9-12 BRAKES
- Check the level of the fluid in the reservoir. If necessary, fill wit i fluid.
- Disconnect the brake lines from the master cylinder. Plug the nes to
keep dirt from entering. - Place a pan or rags under the cylinder.
- Have an assistant slowly depress the brake pedal and hold it d own.
- Block off the outlet ports with your fingers. Be sure to wear glpves.
Have the assistant release the pedal. Make a tight seal with your fintjsrs; do
not allow the cylinder to ingest air when the pedal is released. - Repeat three or four times.
- Connect the brake lines to the master cylinder and top up the
reservoir.
LINES & WHEEL CIRCUITSluidI See Figures 40, 41, 42 and 43
- Insert a clear vinyl tube onto the bleeder plug at the wheel, lf|llfour
wheels are to be bled, begin with the right rear.
Fig. 40 Remove the rubber cap covering the bleeder plugFig. 41 Place a jar with clear tubing on the plug and begi i the
bleeding process- Insert the other end of the tube into a jar which is half filled with
brake fluid. Make sure the end is submerged in the fluid. - Have an assistant slowly pump the brake pedal several times. On the
last pump, have the assistant hold the pedal fully depressed. While the
pedal is depressed, open the bleeder plug until fluid starts to run out, then
close the plug.
»»lf the brake pedal is pumped too fast, small air bubbles will form
in the brake fluid which will be very difficult to remove. - Repeat this procedure until no air bubbles are visible in the hose.
Close the bleeder port.
"•Constantly replenish the brake fluid in the master cylinder reser-
voir, so that it does not run out during bleeding. - If bleeding the entire system, repeat the procedure at the left rear
wheel, the right front wheel and the left front wheel in that order. - Bleed the load sensing proportioning and bypass valve.
Fig. 42 Remove the bleeder plug on the proportioning valve...Fig. 43 ... then bleed the valve