ISUZU TFS SERIES 1997 Workshop Manual

BRAKES 5-43
Important Operations
1. Bode ; Wheel Cylinder
Lubricate the cylinder bore with clean rubber grease.
4. Piston Assembly
Install new piston cups on each piston so that the flared end of
the cups are turned to the inboard side of the pistons.
Attach the return spring and the boot to the piston.
Apply DELCO silicone lube No.5459912 (or equivalent) to the
piston and the inner face of the boots.
6. Bleeder ; Wheel Cylinder
Torque N
m(kgfm/Ibft)
6.9 - 11.8 (0.7 - 1.2 / 5.1 - 8.7)
7. Wheel Cylinder Assembly
Torque N
m(kgfm/Ibft)
11 - 15 (1.1 - 1.5 / 8 - 11)

5-44 BRAKES
18.Brake Line
Torque N
m(kgfm/Ibft)
13 - 19 (1.3 - 1.9 / 9 - 14)
Apply grease lightly to back plate A.

BRAKES 5-45
BRAKE CONTROL
REMOVAL AND INSTALLATION
BRAKE PEDAL ASSEMBLY
This illustration based on the LHD model
Removal Steps
1. Return spring
2. Snap pin
3. Pin ; push rod to pedal
4. Pin ; fulcrum, pedal to bracket
5. Pedal assembly with bush
Installation steps
To install, follow the removal procedure in
reverse order.
Before installation, appyl grease to the entire
circumference of the fulcrum pin (4) and push
rod pin (3).
Refer to "SERVICING" in this section for
adjustment procedure of brake pedal.

5-46 BRAKES
MASTER CYLINDER
REMOVAL AND INSTALLATION
BRAKE PEDAL ASSEMBLY
This illustration based on the LHD model.
Removal Steps
1. Brake line
2. Nut ; master cylinder to vacuum servo
3. Master cylinder assembly
Installation Steps
3. Master cylinder assembly
2. Nut ; master cylinder to vacuum servo
1. Brake line
Important Operation - Removal
1. Brake Line
Be very careful not to spill brake fluid on the painted surface.
Damage to the painted surface will result.
Important Operation - Installation
2. Nut ; Master Cylinder to Vacuum Servo
Torque N
m (kgfm/lbft)
1.0 - 1.6 (7 - 12 / 9.8 - 16)
1. Brake Line
Torque N
m (kgfm/lbft)
0.9 - 1.5 (6.5 - 11 / 8.8 - 15)

BRAKES 5-47
DISASSEMBLY
Disassembly Steps
1. Dust seal
2. Screw
3. Reservoir ; fluid, brake
4. Grommet
5. Ring ; snap
6. Bolt ; stopper7. Gasket
8. Piston assembly ; primary and spring
9. Piston assembly ; secondary and spring
10. Cover ; fluid reservoir
11. Seal
12. Cylinder assembly ; brake, master

5-48 BRAKES
Important Operations
When disassembling, inspecting or reassembling the master
cylinder assembly, take care not to bring the parts into contact
with mineral oil or dust. Wash the piston cups only with brake
fluid. Do not use gasoline or other mineral-base cleaning
solvents.
5. Ring ; Snap
Remove the snap ring from the cylinder body with pushing in
the primary and secondary pistons.
6. Bolt ; Stopper
Push in the primary and secondary pistons and remove the
stopper bolt completery from the cylinder body, then remove
the primary and secondary piston assemblies.
8. Piston Assembly ; Primary and Spring
9. Piston Assembly ; Secondary and Spring
Don’t remove the spring from the piston.

BRAKES 5-49
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear damage or any other abnormal conditions are found
through inspection.
Cylinder inside face
Piston
Piston cap
Piston cap spacer
Return port
Return spring
Visual Check
Inspect the following parts for wear, distortion, cuts, nicks,
corrosion, or other abnormal conditions.
Master Cylinder Bore Diameter
Standard mm(in)
23.81 (0.938)
Clearance between the Master Cylinder
and the Piston
Measure the outer diameter of the piston assembly at the
portions shown in the left figure.
mm(in)
Standard Limit
0.04 - 0.125
(0.00158 - 0.00493)0.15 (0.00591)
Note:
If the clearance deviates from the range shown above,
replace the master cylinder and the piston assembly
together.

5-50 BRAKES
Return Port
Check the return port for obstructions and if necessary, clean
with a tag wire.
Blow away foreign matter with compressed air.
Primary Piston
After reassembly, push in the primary piston to see that returns
smoothly.
Repeat the test two or three times to see that brake fluid is
forced out from the front and rear outlets.

BRAKES 5-51
REASSEMBLY
; Repair Kit
Reassembly Steps
1. Cylinder assembly ; brake, master
2. Piston assembly ; secondary and spring
3. Piston assembly ; primary and spring
4. Ring ; snap
5. Gasket
6. Bolt ; stopper
7. Grommet
8. Reservoir ; fluid, brake
9. Screw
10. Seal
11. Cover ; fluid reservoir
12. Dust seal
Important Operations
1. Cylinder Assembly ; Brake, Master
Lubricate the master cylinder bore with clean rubber
grease.(arrowed portion)

5-52 BRAKES
2. Piston Assembly ; Secondary and Spring
3. Piston Assembly ; Primary and Spring
Lubricate the piston cups on the primary piston assemblies with
rubber grease.
Take care not to scratch the piston cup when installing the
piston assemblies.
Note:
Don't remove the spring from the piston.
6. Bolt ; Stopper
Depress the primary piston and install the piston stopper bolt
with a new gasket.
Torque N
m(kgfm/lbft)
6.9 - 8.8 (0.7 - 0.9 / 5.1 - 6.5)
7. Grommet
Lubricate the new grommets with clean rubber grease.
Insert the grommets, with the flared side up, into the cylinder
body.
Apply rubber grease to the dust seal portion.
(The portion indicated by the arrows in the left diagram.)
9. Screw
Torque N
m(kgfm/lbft)
1.0 - 2.0 (0.01 - 0.20 / 0.7 - 1.5)
12.Dust Seal
Install the dust seal so that its groove faces downward.