Basic Brake System: Other Mitsubishi Eclipse IV рестайлинг

IMPROVED BRAKING PERFORMANCE

1. An 8+9 inch tandem brake booster provides sufficient braking force in sudden braking range.
2. 16-inch front ventilated disc brakes provide stable braking force and improved braking feel.
3. 14-inch rear solid disc brakes are used.< 2.4L engine >
4. 15-inch rear ventilated disc brakes provide stable braking force and improved braking feel. < 3.8L engine >

IMPROVED STABILITY

1. A 4-wheel anti-lock braking system (4ABS) prevents slipping caused by the vehicle wheels locking up, in order to maintain a stable vehicle posture and steering performance.
2. An electronic brake-force distribution (EBD) makes it possible to maintain the maximum amount of braking force even when the vehicle's load is unevenly distributed.
3. Front and rear wheel X-type brake line layout are used.
4. Ventilated discs on the front brakes improve anti-fading performance.
5. Ventilated discs on the rear brakes improve anti-fading performance. < 3.8L engine >

IMPROVED SERVICEABILITY

1. A diagnosis function for the ABS and ABS/TCL systems to make inspection easier.
2. An outer disc separated hub and rotor make removal and installation easier.
3. The master cylinder reservoir tank cap is colored white to make identification easier.
4. The ABS-ECU, ABS/TCL-ECU and hydraulic unit are integrated to make them more compact and lightweight.

Scheme 34

Scheme 35

Hydraulic brakes are composed of the brake pedal, master cylinder, brake booster and disc brakes. Malfunctions such as insufficient braking power or the generation of noise may occur due to wear, damage or incorrect adjustment of these components.

Use these steps to plan your diagnostic strategy. If you follow them carefully, you will be sure that you have exhausted most of the possible ways to find a basic brake system fault.

1. Gather information from the customer.
2. Verify that the condition described by the customer exists.
3. Find the malfunction by following the symptom chart.
4. Verify malfunction is eliminated.

BLEEDING

MASTER CYLINDER BLEEDING

The master cylinder used has no check valve, so if bleeding is carried out by the following procedure, bleeding of air from the brake pipeline will become easier. (When brake fluid is not contained in the master cylinder).

Scheme 36

1. Fill the reserve tank with brake fluid.
2. Keep the brake pedal depressed.
3. Have another person cover the master cylinder outlet with a finger.
4. With the outlet still closed, release the brake pedal.
5. Repeat steps 2 - 4 three or four times to fill the inside of the master cylinder with brake fluid.

BRAKE LINE BLEEDING

Start the engine and bleed the air in the sequence shown in the figure.

Scheme 37

DISC BRAKE ROTOR CHECK

Before turning the brake disc, the following conditions should be checked.

Scheme 38

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Scheme 40

1. Using a micrometer, measure disc thickness at eight positions, approximately 45 degrees apart and 10 mm (0.4 inch) in from the outer edge of the disc. FRONT BRAKE DISC Standard value: 26.0 mm (1.02 inches) Minimum limit: 24.4 mm (0.96 inch) REAR BRAKE DISC Standard value: 10.0 mm (0.39 inch) Minimum limit: 8.4 mm (0.33 inch) NOTE: Thickness variation (at least 8 positions) should not be more than 0.015 mm (0.0006 inch). CAUTION: After a new brake disc is installed, always grind the brake disc with an on-the-car type brake lathe. If this step is not carried out, the brake disc run-out exceeds the specified value, resulting in judder. When the on-the-car type lathe is used, first install a M12 flat washer on the stud bolt in the brake disc side according to the figure, and then install the adapter. If the adapter is installed with M12 flat washer not seated, the brake disc rotor may be deformed, resulting in inaccurate grinding. Grind the brake disc with all wheel nuts diagonally and equally tightened to the specified torque 100 N.m (74 ft-lb). If all of the wheel nuts are not used, or the tightening torque is excessive or not equal, the brake disc rotor or drum may be deformed, resulting in judder.
2. If the disc thickness is less than the limit, replace it with a new one. If thickness variation exceeds the specification, turn rotor with an on-the-car type brake lathe ("Accuturn-8750" or equivalent). If the calculated final thickness after turning the rotor is less than the standard value, replace the disc.

Scheme 41

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Scheme 44

Scheme 45

1. Remove the brake assembly, and then hold it with wire.
2. Temporarily install the disc with the hub nut.
3. Place a dial gauge approximately 5 mm (0.2 inch) from the outer circumference of the brake disc, and measure the run-out of the disc. Limit: < Front brake disc >: 0.10 mm (0.0039 inch) < Rear brake disc >: 0.04 mm (0.0016 inch)
4. If the brake disc run-out exceeds the limit, correct it as follows: Chalk phase marks on the wheel stud and the brake disc as shown. Remove the brake disc. Then place a dial gauge as shown, and measure the end play while moving the hub in the axial direction. Limit: 0.05 mm (0.002 inch) If the end play exceeds the limit, replace the hub assembly. If the end play does not exceed the limit, dephase the brake disc and secure it. Then recheck the brake disc run-out. CAUTION: After a new brake disc is installed, always grind the brake disc with an on-the-car type brake lathe. If this step is not carried out, the brake disc run-out exceeds the specified value, resulting in judder. When the on-the-car type lathe is used, first install a M12 flat washer on the stud bolt in the brake disc side according to the figure, and then install the adapter. If the adapter is installed with M12 flat washer not seated, the brake disc rotor may be deformed, resulting in inaccurate grinding. Grind the brake disc with all wheel nuts diagonally and equally tightened to the specified torque 100 N.m (74 ft-lb). If all of the wheel nuts are not used, or the tightening torque is excessive or not equal, the brake disc rotor or drum may be deformed, resulting in judder.
5. If the run-out cannot be corrected by changing the phase of the brake disc, replace the brake disc or grind it with the on-the-car type brake lathe ("MAD, DL-8700PF" or equivalent).

BRAKE DRAG FORCE CHECK

Required Special Tool

MB990520: Disc Brake Piston Expander

1. In order to measure the brake drag force, measure the hub torque with the pads removed by the following procedure. Use a spring scale to measure the hub torque in the forward direction. Record hub torque with pads removed.
2. After re-installing the caliper support to the knuckle, install the pad clips and the pads to the caliper support.
3. Clean the piston and insert into cylinder with special tool MB990520.
4. Be careful that the piston boot does not become caught, when lowering the caliper assembly and installing the lock pin bolt.
5. Check the brake drag force as follows. Start the engine and hold the brake pedal down for 5 seconds. [Pedal depression force: approximately 200 N (45 pounds)]. Stop the engine. Turn the brake disc forward 10 times. Use a spring scale to measure the hub torque with pads installed in the same direction as earlier. (Scheme 44)or (Scheme 45). Calculate the drag force of the disc brake [difference between hub torque with pads installed and hub torque with pads removed]. Standard value: 64 N (14 pounds) or less 54 N (12 pounds) or less
6. If the brake drag force exceeds the standard value, disassemble and clean the piston. Check for corrosion or worn piston seal, and check the sliding condition of the lock pin and guide pin.

MASTER CYLINDER FUNCTION CHECK

1. Remove the reservoir cap.
2. While watching the open reservoir from a distance of 50 cm (20 inches), have an assistant depress the brake pedal. If there was a stream of brake fluid rising from the reservoir, proceed to Step 3. If there was no stream of brake fluid rising from the reservoir, repair or replace the master cylinder.
3. While watching the open reservoir from a distance of 50 cm (20 inches), have the assistant release the brake pedal. If there was a small amount of air bubbles rising through the brake fluid, master cylinder function is normal. If there were no bubbles rising through the brake fluid, repair or replace the master cylinder.

Scheme 46

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Scheme 48

1. Connect an ohmmeter between the stoplight switch connector terminals.
2. There should be no continuity between the terminals when the plunger is pushed in as shown. There should be continuity when it is released.

Scheme 49

>> A << BRAKE BOOSTER VACUUM HOSE CONNECTION

Insert vacuum hose with its paint mark facing upward.

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Scheme 52

1. Use the vacuum pump to measure dimension "A" applying a negative pressure of 66.7 kPa (19.7 in. Hg) to the brake booster. Standard value (A): 10.28-10.52 mm (0.405-0.414 inch) NOTE: When a negative pressure of 66.7 kPa (19.7 in. Hg) is not applied to the brake booster, the push rod protrusion amount (A) should be 8.78-9.02 mm (0.346-0.355 inch).
2. If the protrusion amount is not within the standard value range, adjust the push rod length by turning the push rod. Use special tool MB991568 to turn the push rod while holding the rod spline with angle-nose pliers.

Scheme 53

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Scheme 58

1. In order to measure the brake drag force, measure the hub torque with the pads removed by the following procedure. Use a spring scale to measure the hub torque in the forward direction. Record hub torque with pads removed. CAUTION: Do not let any oil, grease or other contamination get onto the friction surfaces of the pads and brake discs.
2. After re-installing the caliper support to the knuckle, install the pad clips and the pads to the caliper support.
3. Clean the piston and insert into cylinder with special tool MB990520.
4. Turn the brake disc forward 10 times.
5. Be careful that the piston boot does not become caught, when lowering the caliper assembly and installing the lock pin bolt.
6. Check the brake drag force as follows. Start the engine and hold the brake pedal down for 5 seconds. [Pedal depression force: approximately 200 N (45 pound)] Stop the engine. Use a spring scale to measure the hub torque with pads installed in the same direction as earlier. Calculate the drag force of the disc brake [difference between hub torque with pads installed and hub torque with pads removed]. Standard value: < Front > 64 N (14 pounds) or less < Rear > 54 N (12 pounds) or less
7. If the brake drag force exceeds the standard value, disassemble and clean the piston. Check for corrosion or worn piston seal, and check the sliding condition of the lock pin and guide pin.

BRAKE DISC CHECK

1. Disc wear. Refer to «DISC BRAKE ROTOR CHECK»(ref-308286-S14330364552009020200000) .
2. Disc run-out. Refer to «DISC BRAKE ROTOR CHECK»(ref-308286-S14330364552009020200000) .

Scheme 59

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PAD WEAR CHECK

Scheme 61

1. Measure thickness at the thinnest and most worn area of the pad. Standard value: 10 mm (0.39 inch) Minimum limit: 2.0 mm (0.08 inch)
2. Replace the pad assembly if pad thickness is less than the limit value.

LUBRICANTS

LUBRICANTS SPECIFICATION CHART