GPTWR-3 SERIES (2008 Release) - Maxon

4. Verify the pump motor is grounded to vehicle frame.5. Check for leaking hoses and fi ttings. Tighten or replaceas required.6. Check for structural damage and poor lubrication.Replace worn parts.7. Check pump oil fi lter in the reservoir (FIG. 55-1).Clean or replace fi lter, if necessary.8. Check the 2750 PSI relief valve as follows. Withplatform on the ground, remove plug from handpump port (FIG. 55-1). Install 0-3000 PSI pressuregauge in the hand pump port (FIG. 55-1).Remove cover for access to relief valve. Hold thecontrol switch in the UP position. Adjust the reliefvalve until the gauge reads 2750 PSI (FIG. 55-1). Remove guage and reinstall plug in the port.Then, reinstall relief valve cover.ADJUSTMENTCOVERPRESSUREGAUGEHANDPUMPPORT2750PSIRELIEF VALVEADJUST SCREW11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713FIG. 55-155