4-35 Item Description Service action Brake accumulator precharge check öThe axles and hydraulic oil must be at operating temperature for this check. Start and run engine for 30 seconds. Stop engine and turn start switch to ON and wait 5 seconds. NOTE : Engine oil pressure lamp will be on due to no engine oil pressure. Count the number of times the brake pedal can be fully depressed before the low brake pressure warning lamp comes ON. LOOK : Warning lamp SHOULDNOT COMEON in 1~5 applications. Start engine and operate at low idle. Observe cluster while applying brake pedal with maximum force. LOOK/LISTEN : Brake pressure indicator must not come ON. OK Check completed.
NOT OK Make sure brake pedal is not binding and keeping brakes partially engaged. Bleed brakes in group 3. Check brake system pressure. NOT OK If light comes ON with e n g i n e r u n n i n g , accumulator has lost it's charge. Inspect and recharge accumulator. Brake system leakage check Start engine and wait 30 seconds. Stop engine. Wait 2 minutes. Turn start switch to ON and wait 5 seconds. LOOK : Brake oil pressure warning lamp must not come ON within 2 minutes after stopping engine. OK Check completed. NOT OK I f b r a ke l e a k a g e i s indicated with brakes released, check leakage at accumulator inlet check valve and brake valve.
If brake leakage is indicated with brakes applied, check for leakage at brake valve and brake pistons. Check individual component leakage.