Caprice V8-305 5.0L (1986)
Brake Fluid Pump: Technical Service Bulletins
Powermaster Pump - Repriming During Bleeding
86-12
5
DEC., 1985
Subject:
REPRIMING POWERMASTER PUMP
Model and Year:
1986 CHEVROLET CAPRICE
Booster Tube and Nut Assembly
TO:
ALL CHEVROLET DEALERS
A problem may be encountered in bleeding the Powermaster if for any reason the pump has not been properly filled with brake fluid. If after any service
or new installation the pump does not circulate fluid after the motor has run for 20 seconds, it may be necessary to reprime the pump. In order to reprime
the system, the following steps should be followed.
1.
Turn off the ignition.
2.
Apply the brake pedal with medium pressure 10-15 times with ignition off to discharge pressure from the accumulator.
3.
Clean and remove reservoir cover.
4.
Disconnect the booster tube and nut assembly from the casting boss at pump outlet. Refer to illustration.
5.
Wait for brake fluid to gravity bleed from the disconnected end of the tubing.
6.
When brake fluid begins to flow, reconnect the tube and torque to 17 N.m (13 lb.ft.).
7.
Check the fluid level in the reservoir and add new brake fluid if needed. Reinstall the reservoir cover.
8.
Turn on the ignition. The pump should properly circulate the fluid to the accumulator. The fluid level on the inboard side of the reservoir should
diminish if the pump is working properly.
9.
Continue with service manual bleed and fill procedure.