brakes ISUZU TFS SERIES 1997 User Guide

5-6 BRAKES
PIPING DIAGRAM (MODEL WITH BLEND PROPORTIONING VALVE)
PIPING DIAGRAM (MODEL WITH LSPV)

BRAKES 5-7
VACUUM SERVO WITH MASTER CYLINDER (Except Australia)
VACUUM SERVO WITH MASTER CYLINDER (For Australia)

5-8 BRAKES
MAIN DATA AND SPECIFICATIONS
FRONT DISC BRAKE mm(in.)
Caliper type Pin slide
Disc outside diameter 257 (10.118)
Disc thickness 22 (0.866)
Piston diameter 60.33 (2.375)
Adjustment method Self-adjusting
REAR DRUM BRAKE mm(in.) 4 2 4 4
Type Leading and Trailing
Drum inside diameter 254(10.008) 295 (11.614)
Brake lining dimension 221 50 5 283 45 4
(Length Width Thickness) (8.71 1.97 0.20) (11.14 1.77 0.16)
Adjustment method Self-adjusting
WHEEL CYLINDER mm(in.)
Inside diameter : rear
Europe and South Africa 25.40 (1.000)
Others 22.22 (0.875)
MASTER CYLINDER mm(in.)
TypeSplit
Bore diameter 23.81 (0.938)
Piston stroke (Primary + Secondary) 19 + 12 (0.75 + 0.47)
VACUUM SERVO mm(in.)
Diaphragm diameter
Except Australia 230 (9.055)
For Australia 180 (7.087) + 205 (8.077)
Power cylinder stroke 32.5 (1.281)
PEDAL RATIO 4.04
BALANCE
Type Blend proportioning valve/Load sensing proportioning
valve

BRAKES 5-9
SPECIAL PARTS FIXING NUT AND BOLT
FRONT WHEEL BRAKENm(kgfm/lbft)
27-37 (2.8-3.8/20-27)
139-171 (14.2-17.4/103-126) 139-171 (14.2-17.4/103-126)
5.9-8.8 (0.6-0.9/4.3-6.5)
REAR WHEEL DRUM BRAKENm(kgfm/lbft)
11-15
(1.1-1.5/8-11) 13-19 (1.3-1.9/9-14) 6.9-11.8 (0.7-1.2/5.1-8.7)

5-10 BRAKES
VACUUM SERVO WITH MASTER CYLINDER AND BRAKE PEDAL
(Except Australia)
Nm(kgfm/lbft)
6.9-8.8
(0.7-0.9 / 5.1-6.5)15-25 (1.5-2.5 / 11-18)
13-19 (1.3-1.9 / 9.4-14)9.8-16 (1.0-1.6 / 7-12) 18-24 (1.8-2.4 / 13-17) 15-25 (1.5-2.5 / 11-18)
20-25 (2.0-2.5 / 14-18)
9-15
(0.9-1.5 / 6.5-11)
VACUUM SERVO WITH MASTER CYLINDER AND BRAKE PEDAL
(For Australia only)
Nm(kgfm/lbft)
6.9-8.8
(0.7-0.9 / 5.1-6.5)9-15
(0.9-1.5 / 6.5-11)
13-19 (1.3-1.9 / 9.4-14) 9.8-16 (1.0-1.6 / 7-12) 18-24 (1.8-2.4 / 13-17)15-25 (1.5-2.5 / 11-18) 15-25 (1.5-2.5 / 11-18)

BRAKES 5-11
LOAD SENSING PROPORTIONING VALVE Nm(kgfm/lbft)
Primary Master Cylinder Secondary Master Cylinder
19-30 (1.9-3.1/14-22)
14-24 (1.4-2.4/10-17)10-16 (1.0-1.6/7-12)7-10 (0.7-1.0/5-7)15-22 (1.5-2.2/11-16) 13-19 (1.3-1.9/9.4-14)
15-22 (1.5-2.2/11-16)14-24 (1.4-2.4/10-17)
BLEND PROPORTIONING VALVENm(kgfm/lbft)
14-24 (1.4-2.4/10-17)13-19 (1.3-1.9/9.4-14) 13-19 (1.3-1.9/9.4-14)
Secondary master cylinder

5-12 BRAKES
BRAKE PEDAL ASSEMBLYNm(kgfm/lbft)
This illustration is besed on the LHD model 11-20 (1.1-2.0/8-1429-39 (3.0-4.0/22-29)
PARKING BRAKE STEM ASSEMBLY
(STEM TYPE, LEFT HAND DRIVE MODEL)
Nm(kgfm/lbft)
21-34 (2.1-3.5/15-25) 11-20 (1.1-2.0/8-14)14-25 (1.4-2.5/10-18)

BRAKES 5-13
PARKING BRAKE STEM ASSEMBLY
(STEM TYPE, RIGHT HAND DRIVE MODEL)
Nm(kgfm/lbft)
18-24 (1.8-2.4/13-17)11-20 (1.1-2.0/8-14) 14-25 (1.4-2.5/10-18)
BRAKE LINES (HOSES AND PIPES)
(MODEL WITH BLEND PROPORTIONING VALVE)
Nm(kgfm/lbft)
29-39
(3.0-4.0/22-29)13-19 (1.3-1.9/9.4-14)11-20 (1.1-2.2/8-14)
7.8-18 (0.8-1.8/5.8-13)13-19 (1.3-1.9/9.4-14)

5-14 BRAKES
BRAKE LINES (HOSES AND PIPES) (MODEL WITH LSPV)Nm(kgfm/lbft)
29-39 (3.0-4.0/22-29)13-19 (1.3-1.9/9.4-14)11-20 (1.1-2.0/8-14) 13-19 (1.3-1.9/9.4-14)7.8-18 (0.8-1.8/5.8-13)13-19 (1.3-1.9/9.4-14)
PARKING BRAKE LEVER ASSEMBLY (FLOOR MOUNT TYPE)Nm(kgfm/lbft)

BRAKES 5-15
SERVICING
LOAD SENSING PROPORTIONING VALVE (LSPV)
Location of LSPV
Structure and Operation
The following is an explanation of the structure and operation
of the linkage type load sensing device.
This device controls the fluid pressure to the rear brakes in
accordance with changes in rear axle load (vertical
displacements of the rear axle springs).
Structure
This device consists of a load sensing spring (bending bar)
and a valve.
The valve is mounted through a bracket to the frame.
One end of the load sensing spring is fixed to the valve at
the frame and the other end to the rear axle housing
through a shackle.