9.800-087.0 • Rev. 10/09PRESSURE WASHER Troubleshooting Guide12TROUbLESHOOTINgPRObLEM POSSIbLE CAUSE SOLUTIONLOW OPERATINgPRESSUREFaulty pressure gauge Install new gauge.Insufficient water supply Use larger garden hose; clean filter washerat water inlet.Old, worn or incorrect spray nozzle Match nozzle number to machine and/orreplace with new nozzle.Plumbing or hose leak Check plumbing system for leaks. Retapeleaks with teflon tape.Faulty or misadjusted unloader valve(where applicable)Adjust unloader for proper pressure. Installrepair kit when needed. Note: Tamperingwith the factory setting may cause personalinjury and/or property damage, and will voidthe manufacturer's warranty.Worn packing in pump Install new packing kit.Fouled or dirty inlet or dischargevalves in pumpClean inlet and discharge valves.Worn inlet or discharge valves Replace with valve kit.Slow engine RPM Set engine speed per specifications (approxi-mately 2800 RPM - 3400 RPM)fLUCTUATINgPRESSUREValves worn Check and replace if necessary.Blockage in valve Check and clean out if necessary.Pump sucking air Check water supply and suction line for airseepage at joints.Worn piston packing Check and replace if necessary.PRESSURE LOWAfTER PERIODOf NORMAL USENozzle worn Check and replace if necessary.Inlet or discharge valves blocked orwornCheck and clean or replace if necessary.Unloader valve seat worn Check and replace if necessary.PUMP NOISE Air suction line Check water supply and connections on suc-tion line.Broken or weak inlet or dischargevalve springsCheck and replace if necessary.Foreign matter in valves Check and clean if necessary.Worn bearings Check and replace if necessary.Excessive temperature of liquid Reduce to below 180°F (75°C)