1996 TOYOTA LAND CRUISER Master cylinder

BR1CD−01
BR−2
−
BRAKE TROUBLESHOOTING
984
Author: Date:
1996 LAND CRUISER (RM451U)
TROUBLESHOOTING
PROBLEM SYMPTOMS 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.
SymptomSuspect AreaSee page
Low pedal or spongy pedal
4. Fluid leaks for brake system
5. Air in brake system
6. Piston seals: worn or damaged
7. Master cylinder: faulty
8. Booster push rod: out of adjustment−
−
BR−33
BR−33 BR−9
BR−20
Brake drag
1. Brake pedal freeplay: minimal
2. Parking brake lever travel: out of adjustment
3. Parking brake wire: sticking
4. Pad: cracked or distorted
5. Piston: stuck
6. Piston: frozen
7. Tension or return spring: faulty
8. Booster push rod: out of adjustment
9. . Vacuum leaks for booster system
10.. Master cylinder: faultyBR−6
BR−8 −
BR−21
BR−30
BR−33
BR−33
BR−33
BR−33
BR−39
BR−20
BR−18 BR−9
Brake pull
1. Piston: stuck
2. Pad: oily
3. Piston: frozen
4. Disc: Scored
5. Pad: cracked or distortedBR−33
BR−33
BR−21
BR−30
BR−33
BR−33
BR−33
BR−33
BR−21
BR−30
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BR1CE−01
R13494
R00252
BR−4
−
BRAKE BRAKE FLUID
986
Author: Date:
1996 LAND CRUISER (RM451U)
BRAKE FLUID
BLEEDING
HINT:
If any work is done on the brake system or if air is suspected in
the brake lines, bleed the system of air.
NOTICE:
Do not let brake fluid remain on a painted surface. Wash it
off immediately.
1. FILL BRAKE RESERVOIR WITH BRAKE FLUID
Check the fluid level in the reservoir after bleeding each wheel.
Add fluid, if necessary. Fluid: SAE J1703 or FMVSS No.116 DOT3
2. BLEED MASTER CYLINDER
HINT:
If the master cylinder has been disassembled or if the reservoir
becomes empty, bleed the air from the master cylinder.
(a) Disconnect the brake lines from the master cylinder.
(b) Slowly depress the brake pedal and hold it.
(c) Block off the outlet plugs with your fingers, and release the brake pedal.
(d) Repeat (b) and (c) 3 or 4 times.
3. CONNECT VINYL TUBE TO BRA KE CALIPER BLEED-
ER PLUG
Insert other end of the tube in a half −full container of brake fluid.
NOTICE:
Begin bleeding air from the brake caliper with the longest
hydraulic line.
4. BLEED BRAKE LINE
(a) Slowly depress the brake pedal several times.
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BR1CH-01
-
BRAKE BRAKE MASTER CYLINDER
BR-9
1996 LAND CRUISER (RM451U)
BRAKE MASTER CYLINDER
COMPONENTS
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BR1CI-01
R13497
R13591
BR-10
-
BRAKE BRAKE MASTER CYLINDER
1996 LAND CRUISER (RM451U)
REMOVAL
1. DISCONNECT LEVEL WARNING SWITCH CONNEC- TOR
2. TAKE OUT FLUID WITH SYRINGE
NOTICE:
Do not let brake fluid remain on a painted surface. Wash it
off immediately.
3. DISCONNECT BRAKE LINES
Using SST, disconnect the 4 brake lines from the master cylin-
der and 3-way. SST 09023-00100
Torque: 15 N´m (155 kgf´cm, 11 ft´lbf)
4. REMOVE MASTER CYLINDER
(a) Remove the 4 nuts. Torque: 13 N´m (130 kgf´cm, 9 ft´lbf)
(b) Remove the 3-way, check valve bracket, wire harness clamp and bracket.
(c) Pull out the master cylinder and gasket.
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BR1CJ-01
R12236
A
-
BRAKE BRAKE MASTER CYLINDER
BR-1 1
1996 LAND CRUISER (RM451U)
DISASSEMBLY
1. REMOVE RESERVOIR
(a) Remove the set screw and pull out the reservoir.
Torque: 1.7 N´m (17.5 kgf´cm, 15.2 in.´lbf)
(b) Remove the cap and strainer from the reservoir.
2. REMOVE 2 GROMMETS
3. REMOVE BOLT AND CLAMP FROM CYLINDER BODY
4. PLACE CYLINDER IN VISE
5. REMOVE PISTON STOPPER BOLT
Using a screwdriver, push the pistons in all the way and remove
the piston stopper bolt and gasket.
HINT:
Tape the screwdriver tip before use. Torque: 10 N´m (100 kgf´cm, 7 ft´lbf)
6. REMOVE 2 PISTONS AND SPRINGS
(a) Push in the piston with a screwdriver and remove the snap ring with snap ring pliers.
HINT:
Tape the screwdriver tip before use.
(b) Remove the No.1 piston and spring by hand, pulling straight out, not at an angle.
NOTICE:
If pulled out and installed at an angle, there is a possibly
that the cylinder bore could be damaged.
NOTICE:
Be careful not to damage the rubber lips on the pistons.
(c) Place a rag and 2 wooden blocks on the work table, and lightly tap the cylinder flange against the block edges until
the No.2 piston drops out of the cylinder.
HINT:
Make sure that the distance (A) from the rag to the top of the
blocks is at least 100 mm (3.94 in.).
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BR1CK-01
BR-12
-
BRAKE BRAKE MASTER CYLINDER
1996 LAND CRUISER (RM451U)
INSPECTION
HINT:
Clean the disassembled parts with compressed air.
1. INSPECT CYLINDER BORE FOR RUST OR SCORING
2. INSPECT CYLINDER FOR WEAR OR DAMAGE
If necessary, clean or replace the cylinder.
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BR1CL-01
-
BRAKE BRAKE MASTER CYLINDER
BR-13
1996 LAND CRUISER (RM451U)
REASSEMBLY
Reassembly is in the reverse order of disassembly.
NOTICE:
Apply lithium soap base glycol grease to the rubber parts indicated by t\
he arrows
(See page BR-9 ).
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BR1CM-01
BR-14
-
BRAKE BRAKE MASTER CYLINDER
1996 LAND CRUISER (RM451U)
INSTALLATION
Installation is in the reverse order of removal (See page BR-9).
HINT:

Before installation, adjust length of brake booster push rod (See page \
BR-18).

After installation, fill brake reservoir with brake fluid, bleed brake s\
ystem (See page BR-4).

Check for leaks, check and adjust brake pedal (See page BR-6).
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