TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-58
Published 07-19-16, Control # 249-01
Test 24—Checking and Adjusting the Auxiliary System Working Pressure
To determine if piston actuation problems are related to
auxiliary system low pressure, check the pressure at the
auxiliary system disable valve (3) at the upper accessory
valve assembly (2).
To check the auxiliary system working pressure, perform the
following procedure.
1. Make sure the engine is off and the power is off, with all
brakes and locks engaged.
2. Remove the cap from the diagnostic gauge coupler at
the auxiliary system disable valve.
3. Connect a 0 to 413 bar (0 to 6,000 psi) gauge to the
diagnostic gauge coupler.
4. Start the engine and retract any hydraulic cylinder
directly driven off the upper accessory valve assembly.
P923
P923
P922
1
2
3
4
5
6
7
FIGURE 10-27
Item Description
1 Proportional Flow Control Valve
2 Upper Accessory Valve Assembly
3 Auxiliary System Disable Valve
4 Auxiliary System Disable Valve Adjusting Screw
5 Disable Valve Gauge Port
6 Accessory Relief Valve
7 Relief Valve Adjusting Screw
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