Brake System -Brake System4-79Chapter 9 Brake SystemSection 1 Brake SystemI. Precaution 1. It's very important to keep the parts and area clean when repairing the brake system.
2. Care must be taken to replace each part properly as it could affect the performance of the brake system and
result in a driving hazard.
3. Do not let brake fluid remain on a painted surface when repairing any parts. Wash it off immediately.
4. If any work is done on the brake system or air in the brake pipelines is suspected, bleed the system of air.
5. Check the brake system for leakage after repairing the brake system.
6. Use specified brake fluid. Do not mix with other brand of brake fluid.II. Symptom table Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.Symptom
Low brake pedal or recoil
Brake StagnationSuspected Area
1 Brake system (fluid leaks)
2 Brake system (air in)
3 Piston Cup in Sub-pump (worn or damaged)
4 Rear brake shoe clearance (out of adjustment)
5 Master cylinder (faulty)
6 Booster push rod (out of adjustment)
7 Brake shoe or lining (oily)
8 Disc/Drum scratched
1. Brake pedal free stroke is too small
2. Parking brake lever stroke (out of adjustment)
3. Parking brake cable (sticking)
4. Rear brake shoe clearance (out of adjustment)
5. Brake pad or lining (cracked or distorted)
6. Wheel cylinder piston (stuck or frozen)
7. Return spring (faulty)
8. Vacuum booster (faulty)
9. Brake master cylinder (faulty)
Brake System -Brake Master Cylinder Assembly4-90 (4) Adjust the length of the vacuum booster push bar with the
special tool till the push bar touches the mandril head.
9. Install the brake master cylinder.
(1) Install the brake master cylinder on the booster with two bolts.
Torque: 13N.m
(2) Connect the two brake oil pipes to the brake master cylinder
with a special tool. (with ABS)
Torque: 15N.m
(3) Connect the three brake oil pipes to the brake master cylinder
with a special tool. (without ABS)
Torque: 15N.m
(4) Connect # 1 clutch storage tank oil pipe with clip. (Manual
transaxle type)
(5) Insert the brake fluid level alarm switch connector.
10. Add the brake fluid to the Brake fluid reservoir.
11. Discharge the air in the brake master cylinder.
12. Discharge the air in the brake pipeline.
13. Check the level height in the Brake fluid reservoir.
14. Check the brake fluid whether there is any leakage.With ABS:
Without ABS
Brake System -Front Brake Disc4-9611. Remove the front brake piston.
(1) Put a piece of cloth or equivalent between the brake cylinder
and the piston.
(2) Blow the piston out of the brake cylinder with compressed air.
Warning:
In the blowing process, the finger shall not be placed before the
piston.
Note:
Don't spray the brake fluid.
12. Remove the piston oil seal.
Take out the oil seal from the brake cylinder with screwdriver.
13. Check the brake cylinder and piston.
Check the cylinder wall and piston whether there is rust or scar.
14. Check the lining thickness of the brake pad.
Measure the lining thickness with ruler.
Standard Thickness: 10.0mm
Minimum Thickness:1.0mm
15. Check the abrasion indicator steel strap of the front brake.
Make sure the abrasion indicator steel strap has adequate flexibility and has no deformation, crack or damage.
All rust, dirt and other impurities shall be cleaned out.
16. Check the thickness of the brake disc.
Measure the thickness of the brake disc with screw micrometer.
Standard Thickness: 20.0mm
Minimum Thickness: 18.0mm
17. Remove the front brake disc.
(1) Make mark on the brake disc and wheel hub.
(2) Remove the brake disc.
18. Install the brake disc.
Tips:
Install the disc at the minimum swing position.
Brake System -Front Brake Disc4-9719. Check the swing of the brake disc.
(1) Fasten the brake disc temporarily.
Torque: 103N.m
(2) Measure the swing of the brake disc at the 10mm from the disc
edge with a dial test indicator.
Maximum Swing: 0.05 mm
(3) If the swing of the brake disc reaches or exceeds the limit,
check the bearing's axial clearance and the wheel hub's swing.
If the bearing and wheel hub run normally, adjust the swing
of the brake disc, or finish it with onboard finishing machine.
20. Tighten the brake discharge bolt temporarily.
Tighten the brake discharge screw plug on the front brake cylinder temporarily.
21. Install the piston oil seal.
(1) Apply the lithium soap-base glycol lube on the new piston oil seal.
(2) Install the new piston oil seal on the brake cylinder.
22. Install the brake piston.
(1) Apply the lithium soap-base glycol lube on the brake piston.
(2) Install the piston on the front disc brake cylinder.
Note:
Don't tighten the piston into the brake cylinder forcefully.
23. Install the dust shield of the brake wheel cylinder.
(1) Apply the lithium soap-base glycol lube on the dust shield of
the new brake wheel cylinder, and install it on the brake
cylinder.
Tips:
Install the dust shield in the groove of the brake wheel cylinder
and piston reliably.
(2) Install the set ring with screwdriver.
Note:
Be careful not to damage to the dust shield of the brake wheel cylinder.
24. Install the left front disc brake wheel cylinder support.
Fasten the front disc brake wheel cylinder support with two blots.
Torque: 88N.m
25. Install the dust shield of the front disc brake bushing.
Apply the lithium soap-base glycol lube on the surface of the two new dust shields.
Install the two dust shields on the front disc brake cylinder support.
26. Install the sliding pin of the front dist brake cylinder.
Apply the lithium soap-base glycol lube on the surface of the two sliding pin and oil seal.
Install the two sliding pins on the front disc brake cylinder support.
Brake System -Front Brake Disc4-9827. Install the support piece of the front brake pad.
Remove the two support pieces of the brake pad from the front disc brake cylinder support.
28. Install the brake lining block component.
Note:
When replace the abrasion brake lining block, replace the muffle
pad simultaneously.
(1) Apply the disc brake lube on both sides of all muffle pads
(2) Install muffle pads on all brake lining blocks.
(3) The abrasion indicator face upwards. Install a inner brake
lining block, then install a outer lining block.
Note:
Don't apply the oil or lube on the friction surface of the brake pad and brake disc.
29. Install the front disc brake wheel cylinder.
(1) Install the front disc brake wheel cylinder with two bolts.
Torque: 34N.m
(2) Install the new washer and tube with bolt.
Torque: 30N.m
Tips: Fasten the tube in the lock hole of the brake wheel
cylinder reliably.
30. Add the brake fluid to the storage tank.
31. Discharge the air in the brake cylinder.
32. Discharge the air in the brake pipeline.
33. Check the level height in the storage tank.
34. Check the brake fluid whether there is any leakage.
35. Install the front wheel.
Torque: 103N.m
Brake System -Rear Brake Drum4-10213. Check the brake shoe and the brake shoe lining whether they
touch normally.
Mark the inner surface of the brake drum with chalk, joint and
abrade the brake shoe and the inner surface.
If the drum and the lining touch poorly, abrade the brake shoe or
replace a new one.
14. Remove the left front or top brake wheel cylinder.
(1) Unfix the brake oil pipe with a special tool, and collect the
brake fluid with a container.
(2) Remove the bolt and brake wheel cylinder.
15. Remove the brake cup.
(1) Remove the two dust shields from the brake cylinder.
(2) Remove the two pistons and springs.
(3) Remove the two brake cylinder caps from every piston.
16. Check the brake cylinder.
Check the cylinder wall and piston whether there is any rust or nick.
17. Remove the rear discharge screw plug of the brake drum.
18. Tighten the rear discharge screw plug of the brake drum
temporarily.
19. Install the brake wheel cylinder cup.
(1) Apply the lithium soap-base glycol lube on the two brake
wheel cylinder cups and the piston.
(2) Install two brake cylinder caps on every piston.
(3) Install the compression spring and the two pistons on the
brake wheel cylinder.
(4) Install two new dust shields on the brake wheel cylinder.
20. Install the left front or top brake cylinder.
(1) Install the brake cylinder with bolt.
Torque: 9.8N.m
(2) Connect the brake oil pipe with a special tool.
Torque: 15N.m
21. Apply the heat-resistant lube.
Apply the heat-resistant lube on the touch surface of the brake
backboard and the brake shoe.
Brake System -Rear Brake Drum4-105 (2) Measure the inner diameter of the brake drum and the
diameter of the brake shoe, and check the difference of them
whether it is a proper brake shoe clearance.
Brake Shoe Clearance: 0.3mm
Note:
Don't apply the oil or lube on the friction surface of the brake shoe
lining and brake drum.
30. Adjust the shoe clearance of the brake drum.
(1) Install two wheel hub nuts temporarily.
(2) Turn around eight teeth of the adjustor.
(3) Install the hole plug.
31. Install the rear brake drum sub-assembly.
32. Add the brake fluid to the storage tank.
33. Discharge the air in the master cylinder.
34. Discharge the air in the brake pipeline.
35. Check the level height in the storage tank.
36. Check the brake fluid whether there is any leakage.
37. Install the rear wheel.
Torque: 103N.m
38. Check the stroke of the parking brake extension rod.
39. Adjust he stroke of the parking brake extension rod.Extend
Part V Electric System & AccessoryChapter 1 Starting and Charging SystemSection 1 Starting System (MR479Q MR479QA MR481QA)I. Starter inspectionNote:
These tests must be completed within 5s, so as to prevent coil from burning out.
1. Electromagnetic switch testElectric System & Accessory-Starting and Charging System5-1 (1) As shown in the figure, use wire to connect starter.
(2) As shown in the figure, connect electromagnetic switch with
storage battery.
(3) Disconnect exciting coil from binding post A.
(4) Check whether clutch pinion moves outboard.
If clutch pinion does not move, replace electromagnetic switch.
(5) As shown above, connect battery, disconnect positive
pole (+) of battery from binding post, disengage
clutch pinion.
(6) Check whether clutch pinion returns.
If clutch pinion does not return, replace electromagnetic switch.
2. Starter no-load test
(1)Connect field coil and binding post.
(2) As shown in the figure, connect ammeter and battery
to starter.
(3) When check whether clutch pinion moves outwards, starter
should rotate slowly and smoothly.
(4) Check whether current reading of ammeter is normal or not.
Normal current: less than 90 A at 11. 5 V
If current is abnormal, replace starter.Ammeter Battery
Terminal 50
Terminal 30Disconnect
BatteryBatteryTerminal C
Terminal 50