JX Body
- Road test vehicle to determine which rear wheel indicates a premature wheel skid. Remove suspect proportioning valve from brakeline.
- Remove routing clips for brakelines and fuel lines from floorpan so brakelines will not be bent when installing proportioning valve with adapters back into vehicle. Remove brakelines from routing clips.
- Install pressure test fitting Adapter (8187) into inlet port and Adapter (8187-2) into outlet port of proportioning valve. Install proportioning valve with adapters back into vehicle.
- Install Pressure Gauge (C-4007-A) into each adapter. Bleed air from pressure gauges. Have an assistant hold brake pedal down until pressure on inlet side of proportioning valve is 1000 psi (70 kg/cm2 ) and note pressure on outlet side of proportioning valve. Pressure on outlet side should be 800-900 psi (56-63 kg/cm2 ) on 14" disc/drum brakes, 800-900 psi (56-63 kg/cm2 ) on 14" disc/drum brakes W/ABS and 600-700 psi (42-49 kg/cm2 ) on 14" disc/disc brakes W/ABS. Replace the proportioning valve if pressure is not within specification.
- Remove test equipment. Reinstall brakelines on proportioning valve. Tighten brakeline nuts to 12.5 ft. lbs. (17 N.m). Bleed brake system. See BLEEDING BRAKE SYSTEM . Once brake system is bleed, perform pressure test on remaining proportioning valve.