Pickup 4WD V6-180.5 2959cc 3.0L SOHC (3VZ-E) (1990)
Brake Proportioning/Combination Valve: Testing and Inspection
LOAD SENSING PROPORTIONING AND BY-PASS VALVE (LSP & BV)
CHECK AND ADJUSTMENT OF FLUID PRESSURE
1. SET REAR AXLE LOAD
Rear axle load (includes vehicle weight):
2WD
1 ton, C & C (SRW): 900 kg (1,984 lb)
1/2 ton: 700 kg (1,543 lb)
C & C (DRW): 1,150 kg (2,535 lb)
4WD: 800 kg (1,764 lb)
HINT: (For C&C)
If the vehicle unladen weight exceeds the specification above, set the rear axle load to the specification shown below.
Rear axle load (includes vehicle weight):
SRW: 1,678 kg (3,699 lb)
DRW: 1,996 kg (4,400 lb)
2. INSTALL LSPV GAUGE (SST 09709-29017) AND BLEED AIR
3. RAISE FRONT BRAKE PRESSURE TO 7,845 kPa (80 kgf/cm2, 1,138 psi) AND CHECK REAR BRAKE PRESSURE
Rear brake pressure:
2WD
1 ton, C & C (SRW): 4,413 ± 490 kPa (45 ± 5 kgf/cm2, 640 ± 71 psi)
1/2 ton: 4,315 ± 490 kPa (44 ± 5 kgf/cm2, 626 ± 71 psi)
C & C (DRS): 4,707 ± 490 kPa (48 ± 5 kgf/cm2, 683 ± 71 psi)
4WD
Regular cab: 3,923 ± 490 kPa (40 ± 5 kgf/cm2, 569 ± 71 psi)
Extra cab: 4,315 ± 490 kPa (43 ± 5 kgf/cm2, 626 ± 71 psi)
HINT: The brake pedal should not be depressed twice and/or returned while setting to the specified pressure. Read the value of rear brake pressure
two seconds after adjusting the specified fluid pressure.
If the brake pressure is incorrect, adjust the fluid pressure.