3. HYDRAULIC BRAKE BLEEDING PROCEDURE 3. HYDRAULIC BRAKE BLEEDING PROCEDURE Escaping fluid under pressure can Escaping fluid under pressure can penetrate the skin causing serious injury. penetrate the skin causing serious injury. Avoid the hazard by relieving pressure Avoid the hazard by relieving pressure before disconnecting hydraulic or other before disconnecting hydraulic or other lines. Tighten all connections before lines. Tighten all connections before applying pressure. applying pressure. Search for leaks with a piece of cardboard. Search for leaks with a piece of cardboard. Protect hands and body from high Protect hands and body from high pressure fluids. pressure fluids.
ц If an accident occurs, see a doctor immediately. Any fluid injected into the skin must be surgically removed within a few hours or gangrene may result. Doctors unfamiliar with this type of injury should reference a knowledgeable medical source. Two people are required to bleed brake system oil, one to operate brake valve and other to open and close bleed screws. Air breather Breather vent Breather vent A 1) Install frame locking bar. Engage parking brake. 2) Put a clear plastic tube on bleed screw to route low to hydraulic oil tank filler tube or container (A). 3) Start engine and run at low idle. 4) Push and hold brake pedal down until brake bleeding procedure is complete.
If bubbles continue for more than 2 minutes, stop bleeding procedure. Check for and correct problem, then continue. ц Safety lock bar 5) Open on bleed screw on differential and axle assembly until hydraulic oil starts to flow. Close bleed screw when oil is free of air. Release brake pedal. 6) Repeat steps 1)~5) for each bleed screw. 7) Push either brake pedal and hold down. 8) Check hydraulic oil level. 760F4BS19 4-40