Landa SLT/SLX Kubota Diesel Operator Manual • 9.807-540.0 • Rev. 6/13PRESSURE WASHER Troubleshooting Guide12TROUBLESHOOTINGPROBLEM POSSIBLE CAUSE SOLUTIONLOW OPERATINGPRESSUREFaulty pressure gauge Install new gauge.Insufficient water supply Use larger supply hose; clean filter at water inlet.Old, worn or incorrect spraynozzleMatch nozzle number to machine and/or replacewith new nozzle.Belt slippage Tighten or replace; use correct belt.Plumbing or hose leak Check plumbing system for leaks. Re-tape leakswith teflon tape.Faulty or mis-adjustedunloader valveAdjust unloader for proper pressure. Install repair kitwhen needed.Worn packing in pump Install new packing kit.Fouled or dirty inletor discharge valves in pumpClean 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 air seepage.Valves sticking Check and clean or replace if necessary.Unloader valve seat faulty Check and replace if necessary.BURNER WILLNOT LIGHTLittle or no fuel Fill tank with fuel.Improper fuel or water in fuel Drain fuel tank and fill with proper fuel.Clogged fuel line Clean or replace.Plugged fuel filter Replace as needed.Mis-adjusted burner air bands Readjust air bands for clean burn.Little or no fuel pressure fromfuel pumpIncrease fuel pressure to specification and/orreplace fuel pump. Test with pressure gauge.Faulty burner transformer Test transformer for proper arc between contacts.Replace as needed.(continued onnext page)Disconnected or short inelectrical wiringAll wire contacts should be clean and tight.No breaks in wire.