HYDRAULIC SYSTEM 16000 SERVICE/MAINTENANCE MANUAL
2-28
Published 05-03-17, Control # 228-03
Low Pressure Accessory Adjustment
See Figure 2-26 for the following procedure.
The pressure reducing valve (1) controls pressure in the low
pressure accessory systemsāswing brake, swing lock (past
production), travel brakes, and the travel 2-speed
If you think that a low pressure accessory system is not
operating properly, use the following procedure:
1. Install an accurate 0 to 69 bar (0 to 1,001 psi) hydraulic
pressure gauge between end of the supply line and the
corresponding port of actuator (brake port, for example).
Fittings are 06 ORS.
2. Release the brake by slowly moving the control handle
in either direction to operate the corresponding
functionāthe pressure should be 28 to 35 bar (406 to
508 psi).
3. Apply the brake by moving the control handle to offā the
pressure should be zero.
4. If the pressure is above 35 bar (508 psi), use the
following procedure:
a. Loosen the lock nut (2).
b. Adjust the adjusting screw (3):
- Turn IN to increase the pressure
- Turn OUT to decrease the pressure
c. Start and run the engine at high idle.
d. Fully retract (stall) a rotating bed jack with the switch
on the setup remote control only long enough to get
a gauge reading.
e. Repeat steps a through d until gauge reads no
higher than 35 bar (508 psi).
f. Hold the adjusting screw in position and securely
tighten the locknut.
5. Stop the engine, remove the gauge, and reconnect the
hydraulic lines.
1
2
Item Description
1 Servo Gauge Ports (SAE 06)
2 Lock Nut
3 Adjusting Screw
Wrench Size
Pump Series
Lock Nut
Hex Size
Internal
Hex Size
Early Series Units 17 mm 5 mm
Current Series Units 10 mm 3 mm
FIGURE 2-26
P1535a
Typical Pump Installation
3