G 30 Van V8-454 7.4L VIN N TBI (1995)
7. Bleed wheel cylinder and calipers.
8. Turn ignition key to On position, then perform 3 function test with TECH 1 scanner.
9. Check brake pedal feel and braking performance; repeat procedure if required.
General Information
The braking system can be bled manually or with pressure bleeding equipment. If bleeding manually, check fluid level frequently.
Brake fluid should never be reused. Before driving the vehicle, check brake operation to ensure a firm pedal has been obtained.
Brake fluid will damage electrical connections and painted surfaces. Use shop cloths, suitable containers, and fender covers to prevent brake
fluid from contacting these areas. Always seal and wipe off brake fluid containers to prevent spills.
Manual
Fig. 7 Caliper Bleeding Hose Installation
1. If vehicle is equipped with a vacuum or hydraulic booster, relieve system by applying brakes several times with engine off.
2. Fill master cylinder reservoir with DOT 3 brake fluid. Maintain full level during bleeding procedures.
3. If master cylinder is replaced or suspected to have air in the bore, bleed it before calipers.
a. Disconnect forward brake pipe connection at master cylinder and allow brake fluid to flow from connector port, then reconnect pipe but do not
tighten.
b. Slowly apply brake pedal to allow air to bleed from loose fitting, then tighten fitting before releasing brake pedal.
c. Wait 15 seconds, then repeat sequence, including 15 second wait, until all air has been purged from bore.
d. After all air has been removed from forward pipe, repeat procedure for rear pipe.
4. If the vehicle is equipped with four wheel anti-lock brakes (4WAL), the Brake Pressure Modular Valve (BPMV) may need to be bled. If the
BPMV has been replaced or is suspected of having air trapped inside, bleed system as outlined in "Anti-Lock Brakes chapter."
5. Bleed each wheel in the following sequence:
a. Right rear.
b. Left rear.
c. Right front.
d. Left front.
6. Attach a suitable hose to wheel caliper valve and immerse opposite end of hose into a suitable clean container partially filled with clean brake fluid
, Fig. 7.
