022-00028AE Operation and Maintenance Manual
Inspection, Maintenance and Adjustment 4-45
2,000 HOUR / YEARLY SERVICE
PERFORM ALL 10 HOUR / DAILY, 50, 250, 500 AND 1,000 HOUR SERVICE CHECKS
CHECK STEERING, BRAKE, DRIVE SHAFT, ENGINE AND FUEL SYSTEM
REPLACE PIPES AND HOSES
1.
Replace pipes that carry brake fluid to
wheel brakes i.e., service brake pipe (1,
Figure 82) parking brake pipe (2). Also
replace hoses that carry hydraulic fluid to
steering cylinders.
2.
It is difficult to determine condition of many
pipes and hoses. The best way to ensure
safe operation and to maintain maximum
performance is to replace hoses on a
regular basis. If any brake or steering
pipes and hoses become damaged or
appear defective in any way, replace them
immediately regardless of time interval
since their last replacement.
BLEED BRAKES
When brake hoses or brake tubes are replaced, air can be introduced into brake hydraulic system. Air can
cause brakes to operate intermittently, which is a dangerous condition. Never operate machine with air in
brake hydraulic system. A spongy feel when pressing brake pedal is a sign that air is present in brake
hydraulic system.
To bleed air out of brake hydraulic system,
perform the following steps: (Figure 83)
1.
Start engine and place transmission in
"NEUTRAL."
2.
Remove rubber cap from bleeder screw on
wheel.
3.
Place one end of a plastic hose (2) over
bleeder screw (1). Place other end of hose
in a container (3) filled with brake fluid.
4.
Station one person in operator’s cab, and
one person at bleeder screw on wheel
being bled.
5.
Open bleeder screw (1). Then press down
on brake pedal until it rests on floor of cab.
Hold pedal down on floor of cab. Close bleeder screw while pedal is being held down. After bleeder
screw has been closed, allow brake pedal to return to upright position. Continue to open bleeder
screw and press down pedal as described in this step, until fluid expelled from bleeder hose has no
air bubbles present.
6.
Securely close bleeder screw (1). Install rubber cap on bleeder screw.
Figure 82
1
2
3
HLB3018L
Figure 83