HYDRAULIC SYSTEM BLEEDING
- Fill reservoir. Note fluid level carefully. Raise and support front of vehicle. With engine off, rotate steering wheel from lock to lock several times. Lower vehicle.
- Start engine. With engine idling, rotate steering wheel to full lock position, either left or right, and hold in position for 2-3 seconds. Then rotate steering wheel to opposite full lock position and hold it there for 2-3 seconds. Repeat several times. Stop engine. Check for foaming or emulsification. Check fluid level. Repeat procedure if necessary.
POWER STEERING PUMP BELT
On ES300 and RX300 models, measure drive belt tension, using Belt Tension Gauge (95506-00020). Adjust belt to obtain 150-185 lbs. (68-84 kg) tension for new belt, or 95-135 lbs. (43-61 kg) tension for any belt that has run longer than 5 minutes. All other vehicles are equipped with an automatic belt tensioner, and do not require adjustment.
CABLE REEL
Note. Cable reel may also be known as spiral cable or clockspring.
- Ensure front wheels are in straight-ahead position. Remove steering wheel and horn pad. See STEERING WHEEL & HORN PAD under REMOVAL & INSTALLATION in STEERING COLUMNS article.
- Rotate cable reel counterclockwise by hand until it becomes hard to turn. Rotate cable reel clockwise 2 1/2-3 turns. Mating marks should align. Reference mark should be visible through inspection hole. Install steering wheel, ensuring mating marks are aligned.
STEERING WHEEL TURNING FORCE
Note. Tire type, inflation pressure, and contact surface will affect turning effort, and must be considered while making diagnosis.
- Center steering wheel. Remove steering wheel horn pad. See STEERING WHEEL & HORN PAD under REMOVAL & INSTALLATION in STEERING COLUMNS article. With engine at idle, attach torque wrench to steering wheel nut. (Scheme 11) Measure turning effort in both directions. Maximum steering effort should not exceed specification. See «STEERING WHEEL TURNING FORCE»(ref-127903-S09267256852001103000000) table.
- If steering effort is excessive, repair system as necessary. Unplug pressure control valve harness connector. Measure turning effort again. If steering effort is excessive, repair system as necessary.
| Application | INCH Lbs. (N.m) |
|---|---|
| ES300 & RX300 | 52 (5.9) |
| GS300, GS430 & LS430 | 61 (6.9) |
| IS300 | 37-48 (4.1-5.4) |
STEERING WHEEL TURNING FORCE
Scheme 11
ES300 & RX300
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Control Valve Housing Set Bolt | 13 (18) | |
| Front & Rear Bracket Bolts | 32 (43) | |
| Front & Rear Housing Bolts (RX300) | 18 (24) | |
| Intermediate Shaft Assembly-To-Control Valve Shaft Bolt | 26 (35) | |
| Oil Pressure Switch Union Bolt | 15 (20) | |
| Power Steering Gear Bolt/Nut | 134 (181) | |
| Pressure Feed Tube | 18 (24) | |
| Pressure Port Union | 61 (83) | |
| Pulley Set Nut | 32 (43) | |
| Pump Assembly Bolt | ||
| Bolt "A" | 32 (43) | |
| Bolt "B" | 32 (43) | |
| Rack End | 61 (83) | |
| Rack Guide Spring Cap Lock Nut | 51 (69) | |
| Rack Housing Cap | 44 (59) | |
| Rear Housing Set Bolt | 18 (24) | |
| Self-Locking Nut | 18 (24) | |
| Stabilizer Bar Set Bolt | 14 (19) | |
| Tie Rod End Lock Nut | 55 (74) | |
| Union Bolt-To-Pressure Feed Tube | 38 (52) | |
| INCH Lbs. (N.m) | ||
| Clamp Plate Set Nut | ||
| Bolt | 69 (7.8) | |
| Nut | 7 (.8) | |
| Pressure Feed Clamp Nut | 89 (10) | |
| Suction Port Union Bolt | 112 (13) | |
| Turn Pressure Tube Union Nut | 106 (12) | |
TORQUE SPECIFICATIONS (ES300 & RX300)
GS300 & GS430
| Application | Ft. Lbs. (N.m) | ||
|---|---|---|---|
| Air Control Valve | 21 (29) | ||
| Bearing Guide Nut | 18 (24) | ||
| Control Valve Bolt | 13 (18) | ||
| Cylinder End Stopper | 44 (59) | ||
| Front & Rear Bracket Bolts (GS430) | 29 (39) | ||
| Front & Rear Housing Bolts/Nuts (GS300) | 18 (24) | ||
| Intermediate Shaft-To-Control Valve Shaft Bolt | 26 (35) | ||
| Oil Reservoir Set Bolt (GS300) | |||
| Front | 10 (13) | ||
| Rear | 18 (24) | ||
| Power Steering Gear Bolt | 48 (65) | ||
| Pressure Feed & Return Tube Union Bolt | 36 (49) | ||
| Pulley Set Nut (GS300) | 32 (43) | ||
| Pump Assembly | |||
| GS300 | |||
| Bolt | 43 (58) | ||
| Nut | N/A | ||
| GS430 | |||
| Bolt | 29 (39) | ||
| Nut | 32 (43) | ||
| Rack End | 56 (76) | ||
| Rack Guide Spring Cap Lock Nut | 51 (69) | ||
| Solenoid Valve-To-Front Housing | 38 (51) | ||
| Union Bolt | 36 (49) | ||
| INCH Lbs. (N.m) | |||
| Suction Port Union Bolt (GS430) | 112 (13) | ||
| Tube Clamp Set Bolt | 48 (5) | ||
TORQUE SPECIFICATIONS (GS300 & GS430)
IS300
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Bearing Guide Nut | 18 (24) | |
| Control Valve Bolt | 13 (18) | |
| Cylinder End Stopper | 44 (59) | |
| Oil Reservoir Set Bolt (GS300) | ||
| Front | 10 (13) | |
| Rear | 18 (24) | |
| Power Steering Bolt | 43 (58) | |
| Pressure Port Union | 61 (83) | |
| Pulley Set Nut | 32 (43) | |
| Pump Assembly Bolt | 43 (58) | |
| Rack End | 56 (76) | |
| Rack Guide Spring Cap Lock Nut | 37 (50) | |
| Rear Housing Bolt/Nut | 18 (24) | |
| Sliding Yoke-To-Control Valve Shaft | 26 (35) | |
| Turn Pressure Tube Union Nut | 18 (24) | |
TORQUE SPECIFICATIONS (IS300)
LS430
| Application | Ft. Lbs. (N.m) | |
|---|---|---|
| Bearing Guide Nut | 18 (24) | |
| Control Valve Bolt | 13 (18) | |
| Cylinder End Stopper | 44 (59) | |
| Front & Rear Housing Bolts | 16 (22) | |
| Power Steering Gear Bolt/Nut | 87 (118) | |
| Pressure Control Valve | 13 (18) | |
| Pressure Feed & Return Tubes | 36 (49) | |
| Pressure Port Union | 51 (69) | |
| Pump Assembly | ||
| Bolt | 29 (39) | |
| Nut | 32 (43) | |
| Pump Bracket | 22 (30) | |
| Rack End | 70 (95) | |
| Rack Guide Spring Cap Lock Nut | 37 (50) | |
| Rack Housing Cap | 51 (69) | |
| Self-Locking Nut | 43 (59) | |
| Sliding Yoke-To-Control Valve Shaft | 26 (35) | |
| Turn Pressure Tube | ||
| Bolt | 25 (34) | |
| Union Nut | 20 (26) | |
| INCH Lbs. (N.m) | ||
| Suction Port Union | 106 (12) | |
TORQUE SPECIFICATIONS (LS430)