Kärcher HD 3.0/27 G Service Manual

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Kärcher HD 3.0/27 G Service Manual Manual pdf 9 page image

9.801-760.0 • Rev. 03/1625PRESSURE WASHER Troubleshooting GuideTROUBLESHOOTINGFor Models: HD3.0/27 GB, HD 3.3/35 GB, HD 4.0/40 GB, HD 4.0/40 GeBPROBLEM POSSIBLE CAUSE SOLUTIONLOW OPERATINGPRESSURE Faulty pressure gauge Install new gauge.Insuffi cient water supply Use larger supply hose; clean filter at waterinlet.Old, worn or incorrect spray nozzle Match nozzle number to machine and/orreplace with new nozzle.Belt slippage Tighten or replace; use correct belt.Plumbing or hose leak Check plumbing system for leaks. Re-tapeleaks with teflon tape.Faulty or mis-adjusted unloadervalveAdjust unloader for proper pressure. Installrepair kit when needed.Worn packing in pump Install new packing kit.Fouled or dirty inlet or dischargevalves in pump Clean inlet and discharge valves.Worn inlet or discharge valves Replace with valve kit.Obstruction in spray nozzle Remove obstruction.Leaking pressure control valve Rebuild or replace as needed.Slow engine RPM Set engine speed at proper specifications.Pump sucking air Check water supply and possibility of airseepage.Valves sticking Check and clean or replace if necessary.Unloader valve seat faulty Check and replace if necessary.FLUCTUATINGPRESSUREWorn or dirty pump valves Call local distributor.Nozzle is obstructed Blow out or remove debris with fi ne needle.Pump sucking air, inlet hoseleakingCheck that all hoses and fittings are airtight.Turn off machine and trigger spray gun untila steady flow of water emerges through thenozzle.Insuffi cient water supply Turn water on full force. Check garden hosefor kinks, leaks or blockage.PRESSURE LOWAFTER PERIOD OFNORMAL USENozzle worn Replace nozzle.Unloader valve worn Replace unloader valve.ENGINE WILL NOTSTART OR STOPSWHILE OPERATINGLow oil shutdown Fill engine with oil.Out of gas Fill fuel tank.Water in gasoline Drain gas tank; fi ll with clean fuel.ENGINE ISOVERLOADEDNozzle partially blocked Clean nozzle.Excessive pressure from highengine RPMAdjust engine throttle to lower RPM.

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