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Bleeding the hydraulic brake system:-
1 Charge the air system to operating pressure and adjust the wheelbrakes.
2 Remove the filler caps from the hydraulic master cylinder, and, if necessary, top up the fluid levels.
3 Clean each bleeder screw and attach a length of rubber tube to one of the rear brake bleeder screws. Place the other end of the tube in a glass jar filled with sufficient brake fluid to immerse the end of the tube.
4 Unscrew the bleeder screw two or three turns and employ an assistant to operate the brake pedal until all of the air bubbles cease to appear from the end of the rubber tube.
The fluid level must be maintained above the minimum level indicated on the reservoirs during the bleeding operation.
5 Tighten the bleeder screw, remove the rubber tube and repeat the operation on the remaining brakes.
6 Top up the fluid level to the maximum indicated on the reservors, ensure that the vent hole in the caps is unobstructed and replace the caps.
7 Push the air actuator indicator rod until it contacts the piston.
8 apply heavy pressure to the brake pedal and check that the indicator rod does not emerge to reveal the red band, as this indicates the presence of air, leakage in the system or incorrect brake shoe adjustment.This must be corrected by further bleeding and/or adjustment after examination of the hydraulic system.
The fluid bled from the system must be discarded as it contains air (and must not be used for topping up the reservoirs).
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