Land Cruiser, Pickup & Van
- Load sensing proportioning and by-pass valve (LSP & BV or LSPV) is designed to control fluid pressures at rear brakes depending upon rear axle load. Specified weight, which includes vehicle weight, is placed on the rear axle for testing and adjusting pressures. See Figure.
- Test weight for rear axle load, including vehicle weight, is set at 1543 lbs. (700 kg) for Van and 1-ton 2WD Pickup models. On 1/2-ton 2WD Pickup test weight is 1764 lbs. (800 kg). Test weight for 4WD Pickup models is 1984 lbs. (900 kg). Test weight for Land Cruiser models is 2646 lbs. (1200 kg). On Camry, test weight is 200 lbs. (100 kg) above rear axle unladen weight.
- Install Pressure Gauge Set (09709-29017) on vehicle. Connect one gauge to front caliper and one gauge to rear wheel cylinder. Bleed system. Depress brake pedal until pressure reading at front wheel is 1138 psi, (80 kg/cm2 ) on Camry, or 711 psi (50 kg/cm2 ) on all other models. DO NOT depress brake pedal more than once or release pedal when setting test pressure on front gauge.
- Wait 2 seconds from setting of test pressure before recording pressure reading from rear gauge. Raise pressure on front gauge to 1422 psi (100 kg/cm2
) and record pressure reading from rear gauge after 2 seconds. Compare recorded pressures with specified rear brake pressures. See BRAKE PRESSURES table for correct pressure ranges.BRAKE PRESSURES
Application Front Gauge psi (kg/cm2 ) Rear Gauge psi (kg/cm2 ) Land Cruiser 1st Reading 711 (50) 498-640 (29-39) 2nd Reading 1422 (100) 725-925 (51-65) Pickup 2WD 1-Ton/C & C 1st Reading 711 (50) 455-597 (32-42) 2nd Reading 1422 (100) 696-896 (49-63) 1/2-Ton 1st Reading 711 (50) 413-555 (29-39) 2nd Reading 1422 (100) 526-726 (37-51) 4WD 1st Reading 711 (50) 384-526 (27-37) 2nd Reading 1422 (100) 540-740 (38-52) Van 1st Reading 711 (50) 341-483 (24-34) 2nd Reading 1422 (100) 384-584 (27-41) - Adjust fluid pressure if rear pressure readings do not meet specification. Change length of No. 2 shackle to adjust pressures. See Fig 1. If rear pressure readings are low, distance "A" must be increased. If rear pressure readings are high, distance "A" must be decreased. Turn No. 2 shackle 360 degrees for pressure change of 8.5 psi (.6 kg/cm2 ).
- Repeat pressure tests after adjusting shackle length. If rear pressures do not meet specification after adjusting No. 2 shackle, reposition valve body. If rear pressures are too high, raise valve body. If rear pressures are too low, move valve body lower.
- Adjust length of No. 2 shackle to standard length. Standard length of No. 2 shackle for 4WD Pickup models is 4.72" (120 mm) with adjusting range of 4.49-4.96" (114-126 mm). Standard length of No. 2 shackle on all other models is 3.07" (78 mm) with adjusting range of 2.83-3.31" (72-84 mm).
- If pressures cannot be adjusted, check valve housing. Position valve body in uppermost position. Apply brakes and record rear brake pressures. See VALVE BODY ADJUSTMENT table for specified range. If measured value does not meet specification, replace valve assembly.
VALVE BODY ADJUSTMENT
| Application | Front Gauge psi (kg/cm2 ) | Rear Gauge psi (kg/cm2 ) | ||
|---|---|---|---|---|
| Land Cruiser | ||||
| 1st Reading | 71 (5) | 71 (5) | ||
| 2nd Reading | 356 (25) | 148-205 (10.4-14.4) | ||
| 3rd Reading | 853 (60) | 311-411 (21.9-28.9) | ||
| Pickups | ||||
| 2WD 1-Ton & C & C | ||||
| 1st Reading | 71 (5) | 71 (5) | ||
| 2nd Reading | 711 (50) | 280-337 (19.7-23.7) | ||
| 3rd Reading | 1138 (80) | 424-509 (29.8-35.8) | ||
| 2WD 1/2-Ton | ||||
| 1st Reading | 71 (5) | 71 (5) | ||
| 2nd Reading | 711 (50) | 228-284 (16.0-20.0) | ||
| 3rd Reading | 1138 (80) | 299-384 (21.0-27.0) | ||
| 4WD | ||||
| 1st Reading | 71 (5) | 71 (5) | ||
| 2nd Reading | 711 (50) | 203-260 (14.3-18.3) | ||
| 3rd Reading | 1138 (80) | 296-381 (20.8-26.8) | ||
| Van | ||||
| 1st Reading | 71 (5) | 71 (5) | ||
| 2nd Reading | 356 (25) | 71-128 (5-9) | ||
| 3rd Reading | 853 (60) | 100-199 (7-14) | ||