HYDRAULIC SYSTEM 14000 SERVICE MANUAL
2-30
Published 09-05-14, Control # 226-02
Low Pressure Accessory Adjustment
See Figure 2-29 for following procedure.
Left travel/drum 3 charge pump #3 is the pressure source for
low pressure accessory systems — swing brake, travel
brake, travel 2-speed, back hitch pins, boom hoist pawl, and
left travel/drum 3 diverter.
If you think that a low pressure accessory system is not
operating properly, proceed as follows:
1. Install an accurate 0 to 1,000 psi (0 to 69 bar) hydraulic
pressure gauge between end of supply line and
corresponding port of actuator (brake port, for example).
Fittings are 06 ORS.
2. Release brake by slowly moving control handle in either
direction to operate corresponding function — pressure
should be approximately 350 psi (24 bar).
3. Apply brake by moving control handle to off — pressure
should be zero.
4. If pressure is not between 320 to 370 psi (22 to 25.5
bar), proceed as follows:
a. Loosen lock nut (2).
b. Adjust adjusting screw (3).
- Turn in to increase pressure.
- Turn out to decrease pressure.
c. Start and run engine at high idle.
d. Repeat above steps until gauge reads no higher
than 375 psi (26 bar).
e. Hold adjusting screw in position and securely
tighten locknut.
5. Stop engine, remove gauge, and reconnect hydraulic
lines.
Loop Flushing Valve Adjustment
The loop flushing valves for the hoists – load and boom – are
not adjustable. Do not tamper with settings of valve
cartridges in loop flushing valve manifold.
If you are experiencing excessive leakage do to a faulty loop
flushing valve, replace valve.
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