TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-52
Published 07-19-16, Control # 249-01
Test 18—Adjusting the Pump Charge Pressure Relief
The pump charge pressure must be measured to accurately
adjust the charge pressure relief valve. To adjust the pump
charge pressure, perform the following procedure.
1. Install a 0 to 42 bar (0 to 600 psi) gauge at pressure
gauge ports M1 (4), M2 (5), or M3 (3) if not used.
See Test 8—Location of Pump Ports
for the location of
the pump test ports.
Charge pressure can also be measured at the pressure
transducer manifold (see Test 16—Checking the Pump
Charge Pressure and Electrical Test).
2. Start the engine with all brakes and locks engaged.
3. Check the gauge for approximately 24 bar (350 psi).
4. To adjust the relief valve, loosen and hold the adjusting
lock nut (2), then turn the adjusting screw (1) until 24 bar
(350 psi) is obtained.
5. Tighten the adjusting lock nut to 46 to 56 Nm (34 to 41 ft-
lb).
6. Remove the gauge and replace the port plug.
P1534
1
2
3
4
5
FIGURE 10-21
Item Description
1 Adjusting Screw
2 Adjusting Lock Nut
3Port M3
4Port M1
5Port M2
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