TROUBLESHOOTING 999 SERVICE/MAINTENANCE MANUAL
10-50
Published 05-16-17, Control # 233-03
Test 18 – 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 system
diagnostic gauge coupler (see Test 17).
• Start engine with all brakes and locks engaged.
• Check gauge for approximately 350 psi (24 bar).
• To adjust, loosen and hold 1-1/16 inch adjusting lock nut
for series 045 – 100 units or 1-5/8 inch adjusting lock nut
for series 130 units.
• Turn adjusting screw until 350 psi (24 bar) is obtained.
• Torque adjusting lock nut to 34 to 41 ft-lbs (46 to 56 Nm).
• Remove gauge and replace port plug.
Item Description
1 Adjusting Screw
2 Adjusting Lock Nut
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