Brakes - Restricted Brake Fluid Passage Diagnosis
88Chevy32Number: 89-44-5
Section: 5
Date: DEC., 1988
Subject: BRAKE LEAD DIAGNOSIS
Model and Year: 1982-89 PASSENGER CARS, LIGHT DUTY TRUCKS AND VANS
TO: ALL CHEVROLET DEALERS
When referring to the Service Manual Brake System Diagnosis Chart, "Restricted Brake Fluid Passage", an additional area to inspect is the Banjo Bolt, which attaches the brake hose to the caliper. This bolt has a through hole to allow the flow of brake fluid from the brake hose to the caliper. Should the hole be obstructed or mislocated, not drilled in the non-threaded area, fluid flow could be restricted and not allow the caliper to function properly.
Whenever this bolt is serviced both copper seals must be replaced and the system must be re-bled.