E 320 Wagon (124.092) L6-3.2L (104.992) (1994)
Power Brake Assist: Testing and Inspection
Fig. 1 Fabricated Brake Unit Adapter
1. Use fabricated adapter, Fig. 1, connect special vacuum gauge tool No. 201 589 13 21 00, or equivalent, to vacuum line between brake booster and
check valve.
2. Connect special Teves pressure tester tool No. 3 9305-1020.4, or equivalent, to brake caliper at vent screw, then bleed pressure tester.
3. Connect special Bosch pedal force meter tool No. 0 681 148 EFSV 57 B, or equivalent, to brake pedal.
4. Start and operate engine until 10.7-11.4 psi vacuum is present by accelerating, then quickly releasing accelerator pedal.
5. If low vacuum or decreasing vacuum is indicated, check following:
a. Vacuum line leak.
b. Faulty check valve.
c. Faulty seal between booster and master cylinder.
d. Faulty brake unit control housing seal, if seal is faulty brake unit must be replaced.
6. Measure line pressure at specified brake pedal force.
Brake Pedal Force, Ft. Lbs. ................................................................................................................................................................................................ 37
Girling LSC 50, psi ..................................................................................................................................................................................................... 71-156
Girling LSC 80, psi ................................................................................................................................................................................................... 142-228
Teves T52/225T, psi ................................................................................................................................................................................................... 28-171
Teves 52/4A/225-210, psi ................................................................................................................................................................................................ 142
Brake Pedal Force, Ft. Lbs. ................................................................................................................................................................................................ 74
Girling LSC 50, psi ................................................................................................................................................................................................... 284-441
Girling LSC 80, psi ................................................................................................................................................................................................... 370-498
Teves T52/225T, psi ................................................................................................................................................................................................. 398-569
Teves 52/4A/225-210, psi ................................................................................................................................................................................................ 356
Brake Pedal Force, Ft. Lbs. .............................................................................................................................................................................................. 111
Girling LSC 50, psi ................................................................................................................................................................................................... 498-711
Girling LSC 80, psi ................................................................................................................................................................................................... 611-768
Teves T52/225T, psi ................................................................................................................................................................................................. 768-967
Teves 52/4A/225-210, psi ................................................................................................................................................................................................ 597
Brake Pedal Force, Ft. Lbs. .............................................................................................................................................................................................. 148
Girling LSC 50, psi ................................................................................................................................................................................................... 768-924
Girling LSC 80, psi ................................................................................................................................................................................................... 839-995