TROUBLESHOOTING 2250 SERVICE/MAINTENANCE MANUAL
10-54
Published 11-06-15, Control # 040-13
Test 19 — Adjusting Pump Charge Pressure Relief
The pump charge pressure must be measured to accurately
adjust the charge pressure relief valve. To adjust pump
charge pressure:
• Install a 0 – 600 psi (0 – 42 bar) gauge at pressure
gauge ports M1, M2 or M3 if not used.
• See Test 9 — Location of Pump Ports
for location of
pump test ports.
• Charge pressure can also be measured at the pressure
transducer manifold (see Test 17 — Checking Pump
Charge Pressure and Electrical Test).
• Start engine with all brakes and locks engaged.
• Check gauge for approximately 350 psi (24 bar).
• To adjust relief valve, loosen and hold the adjusting lock
nut, then turn adjusting screw until 350 psi (24 bar) is
obtained.
• Torque adjusting lock nut 34 to 41 ft lbs. (46 to 56 Nm).
• Remove the gauge and replace the port plug.
Item Description
1 Adjusting screw
2 Adjusting lock nut
3Port M3
4Port M1
5Port M2
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