Hydraulic Power Steering Components Acura ZDX I

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Symptom Troubleshooting Index

Find the symptom in the chart below, and do the related procedures in the order listed until you find the cause.

Hard steering

Note. Compare to a known-good vehicle that is the same trim level. Check for suspension damage. Check the steering alignment. Check the tire condition and pressure.

1. Check the power assist (see «STEERING WHEEL ROTATIONAL PLAY CHECK»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#power-steering-system) ). Is the initial turning load more than 29 N (3.0 kgf, 6.6 lbf)? YES -Do the pump pressure test with T/N 07406-0010001 (see «PUMP PRESSURE TEST WITH T/N 07406-0010001»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__pump-pressure-test-with-tn-07406-0010001) ), T/N 07406-001000A or T/N 07406-001A101 (see «PUMP PRESSURE TEST WITH T/N 07406-001000A OR T/N 07406-001A101»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__pump-pressure-test-with-tn-07406-001000a) ). If the pressure test is within specification, go to step 2. NO -Power assist is OK at this time. Compare to a known-good vehicle.
2. Using a spring scale, measure the power assist in both directions, to the left and to the right. Are the two measurements within 5.0 N (0.51 kgf, 1.12 lbf) of each other? YES -Go to step 3. NO -Go to step 5 .
3. Measure the fluid pressure with both pressure gauge valves open (if so equipped), while turning the steering wheel fully to the left and fully to the right. Is the pressure 9, 250-9, 750 kPa (94.32-99.42 kgf/cm 2 , 1, 341.6-1, 414.1 psi) or more in both directions? YES -Go to step 4. NO -Faulty steering gearbox. Overhaul the steering gearbox (see «STEERING GEARBOX OVERHAUL»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ).
4. Adjust the rack guide (see «RACK GUIDE ADJUSTMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#power-steering-system__rack-guide-adjustment) ), and retest. Is the steering OK? YES -Repair is completed. NO -Faulty steering gearbox. Overhaul the steering gearbox (see «STEERING GEARBOX OVERHAUL»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ).
5. Check the cylinder lines for deformation (see «POWER STEERING HOSE, LINE, AND PRESSURE SWITCH REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__power-steering-hose-line-and-pressure) ). Are any of the line(s) deformed? YES -Replace the deformed line(s). NO -Go to step 6.
6. Check for a bent rack shaft or misadjusted rack guide (too tight). Is the rack shaft bent or the rack guide adjusted too tight? YES -Replace the rack shaft, or readjust the rack guide preload (see «RACK GUIDE ADJUSTMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#power-steering-system__rack-guide-adjustment) ). NO -Faulty valve body unit. Replace the valve body unit (see step 15 on STEERING GEARBOX OVERHAUL ).

Pump Pressure Test with T/N 07406-0010001

Special Tools Required

1. Hose Joint Adapter 07RAK-S040122
2. P/S Joint Adapter (Pump) 07VAK-P8A011A
3. P/S Joint Adapter Plate (Pump) 07VAK-P8A012B
4. P/S Pressure Gauge 07406-0010001

Check the fluid pressure as follows to determine whether the trouble is in the pump or steering gearbox.

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1. Check the power steering fluid level (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
2. Disconnect the pump outlet hose (A) from the pump outlet with care so as not to spill the power steering fluid on the frame and other parts, then install the P/S joint adapter (pump) on the pump outlet (B) with the P/S joint outlet plate (pump).
3. Connect the hose joint adapter to the P/S pressure gauge, then connect the pump outlet hose to the hose joint adapter.
4. Install the P/S pressure gauge to the P/S joint adapter (pump).
5. Open the shut-off valve (A) fully.
6. Open the pressure control valve (B) fully.
7. Start the engine, and let it idle.
8. Turn the steering wheel from lock to lock several times to warm the fluid to operating temperature at 158°F (70°C).
9. Measure steady-state fluid pressure while the engine is idling. The gauge should read no more than 1, 470 kPa (14.99 kgf/cm 2 , 213.2 psi). If the reading is high, check for: Clogged or deformed inlet or return line between the pump and the steering gearbox. Clogged valve body unit.
10. Close the shut-off valve, then close the pressure control valve gradually until the pressure gauge needle is stable. Read the pressure. NOTE: Do not keep the shut-off valve closed more than 5 seconds or the pump could be damaged by over-heating.
11. Immediately open the shut-off valve fully. If the pump is in good condition, the gauge should read at least 9, 250-9, 750 kPa (94.32-99.42 kgf/cm 2 , 1, 341.6-1, 414.1 psi). A low reading means the pump output is too low for full assist. Repair or replace the pump.

Pump Pressure Test with T/N 07406-001000A or T/N 07406-001A101

Special Tools Required

1. Hose Joint Adapter 07RAK-S040122
2. P/S Joint Adapter (Pump) 07VAK-P8A011A
3. P/S Joint Adapter Plate (Pump) 07VAK-P8A012B
4. P/S Pressure Gauge 07406-001000A or 07406-001A101

Check the fluid pressure as follows to determine whether the trouble is in the pump or steering gearbox.

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1. Check the power steering fluid level (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
2. Disconnect the pump outlet hose (A) from the pump outlet with care so as not to spill the power steering fluid on the frame and other parts, then install the P/S joint adapter (pump) on the pump outlet (B) with the P/S joint outlet plate (pump).
3. Connect the hose joint adapter to the P/S pressure gauge, then connect the pump outlet hose to the hose joint adapter.
4. Install the P/S pressure gauge to the P/S joint adapter (pump).
5. Open the shut-off valve (A) fully.
6. Start the engine, and let it idle.
7. Turn the steering wheel from lock to lock several times to warm the fluid to operating temperature at 158°F (70°C).
8. Measure steady-state fluid pressure while the engine is idling. The gauge should read no more than 1, 470 kPa (14.99 kgf/cm 2 , 213.2 psi). If the reading is high, check for: Clogged or deformed inlet or return line between the pump and the steering gearbox. Clogged valve body unit.
9. Let the engine idle, and gradually close the shut-off valve and immediately read the pressure. NOTE: Do not keep the shut-off valve closed more than 5 seconds or the pump could be damaged by over-heating.
10. Immediately open the shut-off valve fully. If the pump is in good condition, the gauge should read at least 9, 250-9, 750 kPa (94.32-99.42 kgf/cm 2 , 1, 341.6-1, 414.1 psi). A low reading means the pump output is too low for full assist. Repair or replace the pump.

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Fluid Check/Replacement

Check

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1. Check the reservoir (A) at regular intervals, and add the recommended fluid as necessary. Always use Acura Power Steering Fluid. Using any other type of power steering fluid or automatic transmission fluid can cause increased wear, fluid leaks, and poor steering in cold weather. NOTE: If the fluid is contaminated, the screen in the reservoir may be partially blocked. Inspect the reservoir screen for any debris. If the reservoir screen is clogged, replace the reservoir, and check for the source of the contamination. System capacity: 1.1 L (1.2 US qt) at disassembly Reservoir capacity: 0.36 L (0.38 US qt) Replacement
2. Disconnect the return hose (A) to drain the reservoir. Take care not to spill the fluid on the vehicle. Wipe off any spilled fluid at once. NOTE: Inspect the reservoir screen for any debris. If the reservoir screen is clogged, replace the reservoir, and check for the source of the contamination.
3. Connect a hose (B) of suitable diameter to the disconnected return hose, and put the hose end in a suitable container.
4. Start the engine, let it run at idle, and turn the steering wheel from lock to lock several times. When fluid stops running out of the hose, shut off the engine. Discard the fluid. NOTE: Stop the engine immediately once the fluid stops running out of the hose to prevent pump damage.
5. Reinstall the return hose on the reservoir.
6. Fill the reservoir to the upper level line (C).
7. Start the engine, and run it at idle. Turn the steering from lock to lock several times to bleed air from the system.
8. Recheck the fluid level, and add some if necessary. Do not fill the reservoir beyond the upper level line.
9. If the fluid is contaminated, dark, or discolored, repeat the procedure as necessary until the system is clean.

Power Steering Hose, Line, and Pressure Switch Replacement

Note these items during installation

Scheme 39

1. Connect each hose to the corresponding line securely until it contacts the stop on the line. Install the clamp or adjustable clamp at the specified distance from the hose end as shown in illustration.
2. Check all clamps for deterioration or deformation; replace the clamps with new ones if necessary.
3. Add the recommended power steering fluid to the specified level on the reservoir, and check for leaks.

Pump Outlet Hose/Inlet Line Replacement

Note. Plug the pump outlet hose end and inlet line end after disconnecting them.

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1. Remove the engine cover (see step 7 on «ENGINE REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-removal) ).
2. Raise and support the vehicle (see «LIFT AND SUPPORT POINTS»(/acura/zdx/i-2009-2013/remont/oem-general-information/#general-information__lift-and-support-points) ).
3. Remove the front wheel on the passenger's side.
4. Place a suitable container under the vehicle to catch any spilled fluid.
5. Drain the power steering fluid from the reservoir (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
6. Cover the auto-tensioner, the alternator, and the A/C compressor with several shop towels to protect them from spilled power steering fluid.
7. Disconnect the pump outlet hose (A) and O-ring (B) from the pump. NOTE: Take care not to spill the fluid on the body or parts. Wipe off any spilled fluid at once. Do not turn the steering wheel with the pump outlet hose removed.
8. Cover the opening of the pump to prevent foreign material from entering the pump.
9. Remove the pump outlet hose clamp bolt (C).
10. Loosen the 16 mm flare nut (A), and disconnect the inlet line (B).
11. Remove the inlet line clamp bolt (C).
12. Remove the inlet line clamp bolt (A), and disconnect the power steering pressure switch connector (B).
13. Remove the pump outlet hose/inlet line (A) through the wheelwell opening on the passenger's side.
14. Install the pump outlet hose/inlet line in the reverse order of removal, and note these items: Fill the system with power steering fluid, and bleed air from the system (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ). Do not get power steering fluid or grease on the auto-tensioner, the alternator, the A/C compressor, the drive belt, or the pulley faces. Clean off any fluid or grease before installation. Start the engine, allow it to idle, and turn the steering wheel from lock to lock several times to warm up the fluid. Check the gearbox for leaks (see «FLUID LEAKAGE INSPECTION»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ). Clean the mating surface between the brake disc and the inside of the wheel, then install the front wheel.

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1. Remove the engine cover (see step 7 on «ENGINE REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-removal) ).
2. Place a suitable container under the vehicle to catch any spilled fluid.
3. Drain the power steering fluid from the reservoir (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
4. Remove the drive belt (A) from the pump pulley (see «DRIVE BELT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/charging-system/#charging-system__drive-belt-replacement) ).
5. Cover the auto-tensioner, the alternator, and A/C compressor with several shop towels to protect them from spilled power steering fluid. Disconnect the pump inlet hose (B) and pump outlet hose (C) from the pump (D), and plug them. Take care not to spill the fluid on the vehicle. Wipe off any spilled fluid at once. Do not turn the steering wheel with the pump removed.
6. Remove the pump mounting bolts (E), then remove the pump.
7. Cover the opening of the pump to prevent foreign material from entering the pump.
8. Transfer the pump inlet hose and the pump outlet hose from the original pump onto the new pump with the new O-ring (F).
9. Loosely install the pump in the pump bracket with the mounting bolts, then tighten the pump fittings to the specified torque.
10. Tighten the pump mounting bolts to the specified torque.
11. Install the drive belt (A) (see «DRIVE BELT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/charging-system/#charging-system__drive-belt-replacement) ). Note these items during drive belt installation: Inspect the belt for wear and cracks. Replace the belt if necessary. Make sure that the belt is properly positioned on the pulleys (B). Do not get power steering fluid or grease on the auto-tensioner, alternator, A/C compressor, and drive belt or pulley faces. Clean off any fluid or grease before installation.
12. Fill the reservoir to the upper level line (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
13. Install the engine cover (see step 57 on «ENGINE INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-installation) ).
14. Start the engine, and check for leaks (see «FLUID LEAKAGE INSPECTION»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ).

Scheme 46

Special Tools Required

1. Pulley Holder 07ZAB-S5A0100
2. Driver Handle, 15 x 135L 07749-0010000
3. Bearing Driver Attachment, 28 x 30 mm 07946-1870100

Note. Refer to the (Scheme 46) as needed during the following procedure.

Disassembly

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1. Remove the power steering pump (see «PUMP REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ).
2. Drain the remaining fluid from the power steering pump.
3. Hold the power steering pump (A) in a vise with soft jaws (B), then hold the pulley (C) with the pulley holder (D), and remove the pulley nut (E) and pulley. Be careful not to damage the pump housing with the jaws of a vise.
4. Remove the inlet joint and 14.8 mm O-ring.
5. Loosen the flow control valve cap, and remove the cap, 18.7 mm O-ring, flow control valve spring, and flow control valve.
6. Remove the pump cover and pump cover seal.
7. Remove the outer side plate, cam ring, rotor/vanes, side plate, 15.2 mm O-ring, and 51.0 mm O-ring.
8. Remove the snap ring, then remove the subvalve from the pump housing.
9. Remove the 40 mm snap ring, then remove the driveshaft by tapping the shaft end with a soft face hammer.
10. Remove the pump seal from the pump housing. Inspection
11. Check the flow control valve for wear, burrs, and other damage to the edges of the grooves in the valve.
12. Inspect the bore of the flow control valve on the pump housing for scratches and wear.
13. Slip the flow control valve (A) back in the pump housing, and check that it moves in and out smoothly. If OK, go to step 14, if not, replace the pump as an assembly. The flow control valve is not available separately.
14. Attach a hose (A) to the end of the flow control valve (B) as shown in illustration. Then submerge the flow control valve in a container of power steering fluid (C), and apply compressed air in the hose. If air bubbles leak through the valve at less than 98 kPa (1.00 kgf/cm 2 , 14.2 psi), replace the pump as an assembly. The flow control valve is not available separately. If the flow control valve is OK, set it aside for reassembly later.
15. Inspect the ball bearing by rotating the outer race slowly. If you feel any play (axial or radial) or roughness, remove the faulty ball bearing (A), and install a new ball bearing (B).
16. Inspect the driveshaft by rotating the inner race slowly. If you feel any play (axial or radial), remove the worn driveshaft (C), and install a new driveshaft (D). Reassembly
17. Align the pin (A) of the subvalve (B) with the oil passage (C) in the pump housing, and push the subvalve into place, then install the snap ring (D).
18. Install the new pump seal (A) (with its grooved side facing in) into the pump housing (B) by hand first, then drive it in using the driver handle (C) and bearing driver attachment (D) until there is no step at the top of the pump seal, and the seal is fully seated in the pump housing.
19. Position the driveshaft (A) in the pump housing, then press it in with the appropriate size socket (B) as shown in illustration.
20. Install the 40 mm snap ring (C) with its beveled edge facing out.
21. Coat the new pump cover seal (A) with power steering fluid, and install it into the groove in the pump cover (B).
22. Install the outer side plate (C) over the two roll pins (D) with its arrow marks stamped (E) facing down.
23. Set the cam ring (A) over the two roll pins with the "•" marks (B) facing down.
24. Install the rotor (A) to the pump cover (B).
25. Set the 10 vanes (C) into the grooves in the rotor. Make sure that the round ends (D) of the vanes are in contact with the sliding surface of the cam ring.
26. Coat the new 15.2 mm O-ring (A) with power steering fluid, and install it into the groove in the side plate (B).
27. Install the side plate on the cam ring (C) by aligning the roll pin set holes (D) in the side plate with the roll pins (E).
28. Coat the new 51.0 mm O-ring (A) with power steering fluid, and position it in the bottom of the pump housing.
29. Install the pump cover assembly (B) in the pump housing. Tighten the bolts to the specified torque alternating in two or more steps.
30. Coat the flow control valve (A) with power steering fluid, then install it and the flow control valve spring (B) in the pump housing.
31. Coat the new 18.7 mm O-ring (C) with power steering fluid, and install it on the flow control valve cap (D), then install the cap on the pump housing. Tighten it to the specified torque.
32. Coat the new 14.8 mm O-ring (A) with power steering fluid, and install it on the inlet joint (B). Install the inlet joint on the pump housing.
33. Install the pulley (A), then loosely install the pulley nut (B). Hold the steering pump in a vise with soft jaws (C). Be careful not to damage the pump housing with the jaws of a vise.
34. Hold the pulley with the pulley holder (D), and tighten the pulley nut to the specified torque.
35. Check that the pump turns smoothly by turning the pulley by hand. If it turns hard, loosen the four flange bolts on the cover, then retighten them in the same manner as in step 29 . Retest. If the pump is still hard to turn, replace the pump.
36. Reinstall the power steering pump (see «PUMP REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ).

Steering Gearbox Removal

Special Tools Required

1. Hood Prop Bar 07AAZ-SZNA100
2. Ball Joint Thread Protector, 12 mm 07AAF-SDAA100
3. Subframe Adapter VSB02C000016*
4. Ball Joint Remover, 28 mm 07MAC-SL0A202
5. Engine Hanger Adapter Set VSB02C000031*

*Available through the Acura Tool and Equipment program, 888-424-6857.

Note these items during removal

1. Using clean solvent and a brush, wash any oil and dirt off the valve body unit, it's lines, and the end of the steering gearbox. Blow dry with compressed air.
2. Lower the front subframe from the body, and remove the steering gearbox through the gap produced by lowering the front subframe.

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1. Remove the passenger's side front fender trim (see «FRONT FENDER TRIM REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-fender-trim-replacement) ).
2. Pry the hood support strut clip, and release the hood support strut (see step 1 on «HOOD SUPPORT STRUT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#hood) ), then move the hood to a vertical position and install the hood prop bar (07AAZ-SZNA100) as shown in illustration.
3. Remove the front bulkhead cover (see «FRONT BULKHEAD COVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-bulkhead-cover-replacement) ).
4. Remove the engine cover (see step 7 on «ENGINE REMOVAL»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-removal) ).
5. Drain the power steering fluid (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
6. Do the battery terminal disconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ).
7. Raise and support the vehicle (see «LIFT AND SUPPORT POINTS»(/acura/zdx/i-2009-2013/remont/oem-general-information/#general-information__lift-and-support-points) ).
8. Remove the front wheels.
9. Pull back the carpet (A), then remove the steering joint cover (B).
10. Loosen the steering joint upper bolt (A) and the steering joint lower bolt (B).
11. Center the steering wheel spokes, and install a commercially available steering wheel holder tool (A).
12. Remove the steering joint lower bolt (A). Disconnect the steering joint (B) by sliding the steering joint into the column shaft (C). Tighten the steering joint upper bolt (D) to hold the steering joint in place.
13. Remove the center guide (E) (if equipped) from the top of the pinion shaft.
14. Wrap vinyl tape over the splines on the pinion shaft.
15. With ECPS: Disconnect the ECPS valve motor connector (A).
16. With active damper system: Remove the suspension stroke sensor harness clips (A) on both sides.
17. Loosen the adjustable hose clamp (A), and disconnect the return hose (B).
18. Loosen the 16 mm flare nut (C), and disconnect the inlet line (D).
19. Remove the cotter pin (A) from the tie-rod end ball joint, then remove the nut (B).
20. Disconnect the tie-rod end ball joint from the knuckle using the ball joint thread protector (C) and the ball joint remover (D) on both sides (see «BALL JOINT REMOVAL»(/acura/zdx/i-2009-2013/remont/wheel-alignment/#front-and-rear-suspension-inspection__ball-joint-removal) ).
21. Disconnect the stabilizer link (A) from the stabilizer bar on both sides (see «BUSHING REPLACEMENT»(/acura/zdx/i-2009-2013/remont/suspension-front/#front-suspension) ).
22. Remove the connector bracket (A) from the front cylinder head; use the bracket bolt hole to attach the engine hanger balance bar front arm.
23. Remove the engine mount control solenoid valve bracket (A) from the rear cylinder head; use the bracket bolt hole to attach the engine hanger balance bar rear arm.
24. Remove the service caps (A) for the front damper flange nuts from the cowl cover (B). Position the engine hanger adapter set (C) with the "FRONT" mark facing forward over the damper flange nuts.
25. Support the engine with the engine support hanger, and the engine hanger balance bar (see step 35 on «TRANSMISSION REMOVAL»(/acura/zdx/i-2009-2013/remont/automatic-trans/#automatic-transmission__transmission-removal) ).
26. Remove the front engine mount stop (A) and the front engine mount control solenoid valve line bracket (B), then remove the front engine mount mounting bolt (C).
27. Raise the vehicle.
28. Remove the engine undercover (see «ENGINE UNDERCOVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#fenderwell__engine-undercover-replacement) ) and the front splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) ).
29. Disconnect the front engine mount control solenoid valve tube (A), and remove the clip (B).
30. Remove the front engine mount mounting bolts (C).
31. Remove the front subframe stiffener plate (A).
32. Remove exhaust pipe A (see «EXHAUST PIPE AND MUFFLER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system__exhaust-pipe-and-muffler-replacement) ).
33. Remove the propeller shaft from the transfer shaft flange (see step 6 on «PROPELLER SHAFT REMOVAL»(/acura/zdx/i-2009-2013/remont/axle-shafts/#drivelineaxle) ).
34. Remove the inlet line clamp bolts (A).
35. Remove the rear mount stop (A), heat shield (B), and the rear engine mount mounting bolts (C), then move the rear engine mount aside.
36. Remove the rear engine mount base bracket (A).
37. Remove the steering gearbox mounting bolts (A) from the driver's side of the steering gearbox.
38. Remove the gearbox stiffener bracket (A) from the driver's side of the front subframe.
39. Remove the steering gearbox mounting bolts from the passenger's side of the steering gearbox, then remove the mounting bracket (A) and cushion (B).
40. Attach the subframe adapter (A) to the subframe by looping the strap (B) over the front of the subframe, then secure the strap with its stop (C), then tighten the wing nut (D).
41. Raise the jack, and line up the slots in the subframe adapter arms with the bolt holes on the jack base, then securely attach them with four bolts.
42. Remove the lower transmission mount mounting bolts (A) and the ground cable bolt (B).
43. Remove the front stiffener mounting bolts (A) on both sides.
44. Loosen the subframe mounting bolts (B) so they are about 40 mm (1.57 in) from the mounting surface. Do not loosen the subframe mounting bolts more than necessary.
45. Remove the rear stiffener mounting bolts (A) on both sides.
46. Loosen the subframe mounting bolts (B) so they are about 40 mm (1.57 in) from the mounting surface. Do not loosen the subframe mounting bolts more than necessary.
47. Lower the transmission jack slowly until the front subframe has dropped about 40 mm (1.57 in).
48. Carefully move the steering gearbox (A) toward the driver's side until the pinion shaft clears the wheelwell opening on the frame.
49. Remove the steering gearbox (A) through the wheelwell opening on the driver's side.
50. Remove the pinion shaft grommet (A) from the top of the valve housing.
51. Remove the return line joint (B) if necessary.
52. After removing the steering gearbox, make sure that no power steering fluid gets on the gearbox mount cushions, gearbox housing, surface of the front subframe and stiffener. Wipe off any spilled fluid at once.

Scheme 92

Special Tools Required

1. Driver Head 07946-MJ00201
2. Driver Handle, 480 mm 070GD-0010100
3. Piston Seal Ring Guide 07LAG-SM40100
4. Piston Seal Ring Sizing Tool 07LAG-SM4020A
5. Bearing Driver Attachment, 42 x 47 mm 07746-0010300
6. Driver Handle, 15 x 135L 07749-0010000
7. Bearing Driver Attachment, 30 07746-0030300
8. Oil Seal Driver, 65 mm 07JAD-PL9A100
9. Pincers Oetiker 1098, commercially available

Note. Refer to the (Scheme 92) as needed during the following procedure.

Disassembly

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1. Remove the steering gearbox (see «STEERING GEARBOX REMOVAL»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__steering-gearbox-removal) ).
2. Remove both tie-rod ends from the rack ends.
3. Drill a 4.0 mm (0.158 in) diameter hole about 2.5-3.0 mm (0.098-0.118 in) in depth in the staked points (A) on the end plug (B) and the gearbox housing (C).
4. Remove the end plug (A) from the gearbox housing, then remove the nut (B) from the pinion shaft end.
5. Remove the boot band (A) and tie-rod clip (B). Pull the boot away from the end of the steering gearbox. Repeat this step for the other side.
6. Hold the gearbox housing using a C-clamp (A) and wooden blocks (B) to a work bench as shown in illustration. Do not clamp the cylinder part of the gearbox housing in a vise.
7. Unbend the lock washer (A).
8. Hold the flat surface sections (A) of the steering rack (B) with one wrench, and unscrew rack end (C) with another wrench. Be careful not to damage the rack surface with the wrench.
9. Remove the lock washer (D) and rubber stop (E). Repeat steps 7 thru 9 for the other side.
10. Loosen the locknut (A), then remove the rack guide screw (B).
11. Remove the spring (C) and the rack guide (D) from the gearbox housing.
12. Remove the cylinder lines (A) from the steering gearbox housing (B). NOTE: Use a second wrench when loosening the cylinder lines to avoid damage to the fittings on the steering gearbox.
13. Remove the connector A, the connector B, and the O-rings (C) from the steering gearbox.
14. Drain the fluid from the cylinder fittings by slowly moving the steering rack back and forth.
15. With ECPS: Remove the ECPS valve motor (A) and O-rings (B). Without ECPS With ECPS
16. Remove the flange bolts, the valve body unit (C), and gasket (D) from the gearbox housing. Check that the valve turns smoothly by turning the pinion shaft. If any play or roughness is felt, replace the valve body unit with a new part.
17. Wrap vinyl tape (A) over the splines on the pinion shaft.
18. Separate the valve housing (A) from the pinion shaft/sleeve (B) and valve oil seal (C).
19. Turn the rack stop (A) counterclockwise until the end (B) of the circlip (C) sticks out from the hole (D) in the cylinder housing. Then turn it clockwise to remove the circlip.
20. Remove the rack stop (A), rack bushing (B), and steering rack (C) from the steering gearbox.
21. Remove the O-ring (A) and cylinder end seal (B) from the rack bushing (C).
22. Carefully pry the piston seal ring (A) and O-ring (B) off the rack piston. Be careful not to damage the inside of the seal ring groove and piston edges when removing the seal ring.
23. Insert the driver handle (A) and driver head (B), and carefully place them on the cylinder end seal (C) as shown in illustration. Make sure that the driver head is securely positioned on the cylinder end seal.
24. Install the bearing separator (D) on the gearbox housing. Set the steering gearbox in a press so the gearbox housing points upward, then push out the cylinder end seal by pressing on the end of the driver handle and driver head.
25. Remove the steering gearbox from the press, and set a driver extension (A) on the driver handle (B). Place the steering gearbox in a press, then remove the cylinder end seal (C) from the gearbox housing by pressing on the end of the extension. Note these items when pressing the cylinder end seal: Keep the tool straight to avoid damaging the cylinder wall. Check the tool angle, and correct it if necessary, when removing the cylinder end seal. Use a press to remove the cylinder end seal. Do not try to remove the seal by striking the tool; striking the tool would break the cylinder end seal, and the seal would remain in the gearbox housing. Reassembly
26. Coat the piston seal ring guide with power steering fluid, then slide it onto the rack, big end first.
27. Position the new O-ring (A) and new piston seal ring (B) on the piston seal ring guide (C), then slide them down toward the big end of the tool. Note these items during reassembly: Do not over expand the resin seal ring. Install the resin seal ring with care so as not to damage them. After installation, make sure you contract the seal ring using the sizing tool. Replace the piston's O-ring and seal ring as a set.
28. Pull the O-ring off into the piston groove, then pull the piston seal ring off into the piston groove on top of the O-ring.
29. Coat the piston seal ring (A) and the inside of the piston seal ring sizing tool (B) with power steering fluid, then carefully slide the tool onto the rack and over the piston seal ring.
30. Move the piston seal ring sizing tool back and forth several times to make sure the piston seal ring seats snugly in groove of the piston.
31. Wrap vinyl tape around the rack teeth and rack end edges, make sure that the vinyl tape is wrapped carefully so that there is no stepped portion.
32. Coat the inside surface of the new cylinder end seal (A) with power steering fluid/then install it onto the steering rack with its grooved side toward the piston. When installing the cylinder end seal, be careful not to damage the lip of the seal with the edges or teeth of the steering rack.
33. Remove the vinyl tape from the steering rack, then remove any adhesive residue.
34. Apply steering grease to the steering rack teeth, then insert the steering rack into the gearbox housing. Be careful not to damage the inner surface of the cylinder wall with the rack edges.
35. Insert an appropriate sized socket (A) onto the steering rack as shown in illustration.
36. Install the new cylinder end seal (B) into the bottom of the cylinder by pressing on the tool with a press. Do not push on the tool with excessive force as it may damage the cylinder end seal.
37. Remove the tool, and center the steering rack.
38. Wrap vinyl tape around the rack end edges, and coat the surface of the tape with power steering fluid. Make sure that the vinyl tape is wrapped carefully so that there is no stepped portion.
39. Coat the inside surface of the new cylinder end seal (A) with power steering fluid, then press it into the rack bushing (B) using the driver handle (C) and bearing driver attachment (D).
40. Coat the new O-ring (E) with power steering fluid, and carefully fit it in the groove of the rack bushing.
41. Install the rack bushing onto the steering rack with the cylinder end seal grooved side toward the piston. Push in the rack bushing with your finger.
42. Remove the vinyl tape from the steering rack, then remove any adhesive residue.
43. Install the rack stop (A) onto the steering rack so the hole (B) is aligned with the slot (C) on the cylinder housing.
44. Insert the end of the new circlip (A) into the hole (B) of the rack stop (C). Turn the rack stop counterclockwise until the circlip is fully seated in the rack stop.
45. Wrap vinyl tape (A) over the pinion shaft/sleeve (B), then coat the vinyl tape with power steering fluid.
46. Insert the pinion shaft/sleeve and a new valve oil seal (C) into the valve housing (D). Be careful not to damage the valve seal rings (E).
47. Remove the vinyl tape from the pinion shaft, then remove any residue from the tape adhesive.
48. Press the new valve oil seal (A) into the valve housing with a hydraulic press, bearing driver attachment, and oil seal driver. Check that the pinion shaft/sleeve turns smoothly by hand after installing it.
49. Apply multipurpose grease to the bearings (A) in the gearbox housing, and install the valve body unit (B) and new gasket (C) by engaging the gears. Note the valve body unit installation position (direction of line connections). Then loosely install the flange bolts and connector bracket (D). Without ECPS With ECPS
50. With ECPS: Coat the new O-rings (E) with power steering fluid, then install the O-rings and the ECPS valve motor (F).
51. Coat the new O-rings (C) with power steering fluid, then install the O-rings to connector A and connector B.
52. Install connector A and connector B to the steering gearbox, and tighten them to the specified torque.
53. Before installing the cylinder lines, coat the new O-rings with power steering fluid, then install the lines. Note these items during reassembly: Thoroughly clean the joints of the cylinder lines. The joints must be free of foreign material. Install the cylinder lines by tightening the flare nuts by hand first, then tighten the flare nuts to the specified torque. Use a second wrench when tightening the cylinder lines to avoid damaging the fittings on the steering gearbox.
54. Apply multipurpose grease to the sliding surface of the rack guide (A), and install it onto the gearbox housing.
55. Remove the old sealant from the rack guide screw (B), and apply new sealant (Loctite 565) to the middle of the threads of the rack guide screw, then install the spring (C), rack guide screw, and locknut (D). NOTE: If more than 5 minutes has passed after applying the sealant, remove the old sealant and residue, and reapply new sealant.
56. Adjust the rack guide screw (see «RACK GUIDE ADJUSTMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#power-steering-system__rack-guide-adjustment) ). After adjusting, check that the rack moves smoothly by sliding it right and left.
57. Hold the gearbox housing using a C-clamp (A) and wooden blocks (B) as shown in illustration. Do not clamp the cylinder part of the gearbox housing in a vise.
58. Install a new rubber stop (A) and a new lock washer (B). Align the lock washer tabs (C) with the slots (D) on the rack end (E) while holding the lock washer in place.
59. Hold the flat surface sections of the steering rack with one wrench, and tighten rack end with another wrench. Be careful not to damage the rack surface with the wrench.
60. Bend the lock washer (A) back against the flat spots on the rack end joint housing. Repeat steps 58 thru 60 for the other side.
61. Install the nut (A) onto the pinion shaft end, and tighten to the specified torque.
62. Tighten the flange bolts on the valve body unit to the specified torque.
63. Remove the old sealant from the end plug (B), and apply new sealant (Loctite 565) all the way around the threads on the end plug, install the end plug onto the gearbox housing, and tighten it to the specified torque. NOTE: If more than 5 minutes has passed after applying the sealant, remove the old sealant and residue, and reapply new sealant.
64. After tightening, use a drift to stake (A) the end plug shoulder against the gearbox housing.
65. Apply a light coat of silicone grease to the boot grooves (A) on the rack ends.
66. Center the steering rack within its stroke.
67. Clean off any grease or contamination from the boot installation groove (A) on the gearbox housing. Install the boot (B) on the rack end with the tie-rod clip (C), and fit the boot end on the housing properly.
68. After installing the boot, wipe the grease off the threaded section (D) of the rack end.
69. Install the new boot band by aligning the tabs (A) with the holes (B) of the band.
70. Close the ear portion (A) of the boot band (B) with commercially available pincers Oetiker 1098 (C) or equivalent.
71. Slide the rack right and left to be certain that the boots are not deformed or twisted. Repeat steps 67 thru 71 for the other side.
72. Install both tie-rod ends to the rack ends.
73. Install the steering gearbox (see «STEERING GEARBOX INSTALLATION»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ).

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1. Before installing the steering gearbox, make sure that no power steering fluid is on the mating surface of the steering gearbox and front subframe. To prevent the gearbox mounting bolts from loosening after the installation, remove any power steering fluid from the mount cushions and bolt holes.
2. Wrap vinyl tape over the splines on the pinion shaft (A). Without ECPS With ECPS
3. Install the return line joint (B) if removed.
4. Without ECPS: Install the pinion shaft grommet (C) on the top of the valve housing.
5. With ECPS: Install the pinion shaft grommet (D). Align the square holes (E) in the pinion shaft grommet with the lug portions (F) on the top of the valve housing. The grommet must not have a gap at the mating surface of the grommet and valve housing.
6. Slide the steering gearbox (A) between the front subframe and body from the driver's side.
7. Carefully move the steering gearbox (A) toward the passenger's side until the pinion shaft clears the wheelwell opening on the body.
8. Continue moving the steering gearbox toward the passenger's side until the steering gearbox is in position.
9. Raise the front subframe up to the body. Loosely install the new subframe mounting bolts (A) and the front stiffener mounting bolts (B), and the new rear stiffener mounting bolts (C).
10. Align the front subframe with the subframe alignment pin (see «FRONT SUBFRAME ALIGNMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#frame) ).
11. Tighten the lower transmission mount mounting bolts (A) and the ground cable bolt (B).
12. Lower the transmission jack supporting the subframe.
13. Position the cutout (A) of the mounting cushion (B) as shown in illustration, and install it on the passenger's side of the steering gearbox.
14. Install the gearbox mounting bracket (C) over the mounting cushion, and loosely install the mounting bolts.
15. Install the gearbox stiffener bracket (A) on the driver's side of the front subframe, and tighten the bolts and nut to the specified torque.
16. Loosely install the new steering gearbox mounting bolts (A) on the driver's side of the steering gearbox.
17. Tighten the steering gearbox mounting bolts on both sides to the specified torque alternately in two or more steps.
18. Install the rear engine mount base bracket (A) with new mounting bolts (B) and the mounting bolts (C).
19. Install the rear engine mount (A) with new mounting bolts (B), and tighten to the specified torque.
20. Install the rear mount stop (C) and the heat shield (D) with new mounting nuts (E), and tighten to the specified torque.
21. Install the inlet line clamp bolts (A), and tighten to the specified torque.
22. Install exhaust pipe A (see «EXHAUST PIPE AND MUFFLER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/mechanical/#intake-manifold-and-exhaust-system__exhaust-pipe-and-muffler-replacement) ).
23. Install the propeller shaft onto the transfer shaft flange (see step 1 on «PROPELLER SHAFT INSTALLATION»(/acura/zdx/i-2009-2013/remont/axle-shafts/#drivelineaxle) ).
24. Install the front subframe stiffener plate (A) with new mounting bolts (B), and tighten to the specified torque.
25. Install the engine undercover (see «ENGINE UNDERCOVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#fenderwell__engine-undercover-replacement) ) and the front splash shield (see «FRONT SPLASH SHIELD REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#fenderwell__front-splash-shield-replacement) ).
26. Install the new front engine mount mounting bolts (A), then connect the front engine mount control solenoid valve tube (B).
27. Lower the vehicle.
28. Install the new front engine mount mounting bolt (A), and install the front engine mount stop (B) and the vacuum hose bracket (C) with new mounting nuts (D).
29. Remove the engine support hanger, the engine hanger balance bar, and engine hanger adapter set, then install service caps to the cowl cover.
30. Install the engine mount control solenoid valve bracket (A) to the rear cylinder head.
31. Install the connector bracket (A) to the front cylinder head.
32. Connect the stabilizer link (A) to the stabilizer bar on both sides (see «BUSHING REPLACEMENT»(/acura/zdx/i-2009-2013/remont/suspension-front/#front-suspension) ).
33. On both sides, wipe off any grease contamination from the ball joint tapered section and threads. Connect the tie-rod end ball joint (A) to the knuckle. Install the new nut (B), and tighten it to the specified torque.
34. Install a new cotter pin (C), and bend it as shown in illustration.
35. Connect the return hose (A) securely, and tighten the adjustable hose clamp (B) (see «POWER STEERING HOSE, LINE, AND PRESSURE SWITCH REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__power-steering-hose-line-and-pressure) ).
36. Connect the inlet line (C), and tighten the 16 mm flare nut (D) to the specified torque.
37. With active damper system: Install the suspension stroke sensor harness clips (A) on both sides.
38. With ECPS: Connect the ECPS valve motor connector (A).
39. Remove the hood prop bar (07AAZ-SZNA100), then reattach the hood support strut on the pivot bolt (see step 2 on «HOOD SUPPORT STRUT REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exterior-body-panels/#hood) ).
40. Install the passenger's side front fender trim (see «FRONT FENDER TRIM REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-fender-trim-replacement) ).
41. Install the front wheels, then set the wheels in the straight ahead position. NOTE: Before installing the wheel, clean the mating surfaces between the brake disc and the inside of the wheel.
42. Center the steering rack within its stroke.
43. Remove the vinyl tape around the splines on the pinion shaft.
44. Loosen the steering joint upper bolt (A), then slip the lower end of the steering joint (B) onto the pinion shaft (C) taking care to align the gap (D) within the angle.
45. Remove the steering wheel holder tool (A).
46. Align the bolt hole (A) on the steering joint with the groove (B) around the pinion shaft, then loosely install the steering joint lower bolt (C).
47. Pull on the steering joint to make sure that the steering joint is fully seated, then tighten the steering joint lower bolt to the specified torque.
48. Tighten the steering joint upper bolt (D) to the specified torque.
49. Install the steering joint cover (A).
50. Set the carpet (B) in place.
51. Do the battery terminal reconnection procedure (see «BATTERY TERMINAL DISCONNECTION AND RECONNECTION»(/acura/zdx/i-2009-2013/remont/body-electrical/#battery) ), and check these items: Make sure the horn and turn signal switches work properly. Make sure the steering wheel switches work properly.
52. Fill the system with power steering fluid, and bleed air from the system (see «FLUID CHECK/REPLACEMENT»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components__fluid-checkreplacement) ).
53. Install the engine cover (see step 57 on «ENGINE INSTALLATION»(/acura/zdx/i-2009-2013/remont/mechanical/#engine-assembly__engine-installation) ).
54. Install the front bulkhead cover (see «FRONT BULKHEAD COVER REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-bulkhead-cover-replacement) ).
55. Remove the hood prop bar (07AAZ-SZNA100), then reattach the hood support strut on the pivot bolt (see step 2 on STEERING GEARBOX REMOVAL ).
56. Install the passenger's side front fender trim (see «FRONT FENDER TRIM REPLACEMENT»(/acura/zdx/i-2009-2013/remont/exteriorinterior-trim/#exterior-trim__front-fender-trim-replacement) ).
57. After installation, check these items: Start the engine, allow it to idle, and turn the steering wheel from lock to lock several times to warm up the fluid. Check the gearbox for leaks (see «FLUID LEAKAGE INSPECTION»(/acura/zdx/i-2009-2013/remont/manual-power-steering/#hydraulic-power-steering-components) ). Check the steering wheel spoke angle. If steering spoke angles to the right and left are not equal (steering wheel and rack are not centered), correct the engagement of the joint/pinion shaft serrations. Set the steering column to the center tilt position and to the center telescopic position, then do the front toe inspection (see «WHEEL ALIGNMENT»(/acura/zdx/i-2009-2013/remont/wheel-alignment/#front-and-rear-suspension-inspection__wheel-alignment) ). Do the VSA sensor neutral position memorization (see «YAW RATE-ACCELERATION SENSOR REPLACEMENT»(/acura/zdx/i-2009-2013/remont/anti-locktraction-control/#vsa-system-components__yaw-rate-acceleration-sensor-replacement) ).

See also:
• SYMPTOM TROUBLESHOOTING INDEX
• RACK GUIDE ADJUSTMENT
• WHEEL ALIGNMENT
• DRIVE BELT INSPECTION
• IDLE SPEED INSPECTION
• STEERING COLUMN REMOVAL AND INSTALLATION
• STEERING WHEEL ROTATIONAL PLAY CHECK
• ENGINE REMOVAL
• LIFT AND SUPPORT POINTS
• DRIVE BELT REPLACEMENT
• ENGINE INSTALLATION
• FRONT FENDER TRIM REPLACEMENT
• HOOD SUPPORT STRUT REPLACEMENT
• FRONT BULKHEAD COVER REPLACEMENT
• BATTERY TERMINAL DISCONNECTION AND RECONNECTION
• BALL JOINT REMOVAL
• BUSHING REPLACEMENT
• TRANSMISSION REMOVAL
• ENGINE UNDERCOVER REPLACEMENT
• FRONT SPLASH SHIELD REPLACEMENT
• EXHAUST PIPE AND MUFFLER REPLACEMENT
• PROPELLER SHAFT REMOVAL
• FRONT SUBFRAME ALIGNMENT
• YAW RATE-ACCELERATION SENSOR REPLACEMENT
• HARD STEERING
• PUMP PRESSURE TEST WITH T/N 07406-0010001
• PUMP PRESSURE TEST WITH T/N 07406-001000A OR T/N 07406-001A101
• POWER STEERING HOSE, LINE, AND PRESSURE SWITCH REPLACEMENT
• STEERING GEARBOX OVERHAUL
• FLUID CHECK/REPLACEMENT
• STEERING GEARBOX REMOVAL