Shark HPB-2011, HPB-3520, HPB-4020, HPB-3530 manual Problem Possible Cause Solution LOW Operating

PRESSURE WASHER Troubleshooting Guide

16

TROUBLESHOOTING

PROBLEM	POSSIBLE CAUSE	SOLUTION
LOW OPERATING	Faulty pressure gauge	Install new gauge.
PRESSURE
	Insufficient water supply	Use larger garden hose; clean filter washer at water
		inlet.
	Old, worn or incorrect spray nozzle	Match nozzle number to machine and/or replace
		with new nozzle.
	Plumbing or hose leak	Check plumbing system for leaks. Retape leaks with
		teflon tape.
	Faulty or misadjusted unloader	Adjust unloader for proper pressure. Install repair kit
	valve (where applicable)	when needed.
	Worn packing in pump	Install new packing kit.
	Fouled or dirty inlet or discharge	Clean inlet or discharge valves.
	valves in pump
	Worn inlet or discharge valves	Replace with valve kit.
DETERGENT NOT	Air leak	Tighten all clamps. Check detergent lines for holes.
DRAWING
	Valve in the injector head may be	Clean or replace valve in injector.
	blocked, dirty or damaged
	Filler screen on detergent suction	Clean or replace.
	hose plugged
	Dried up detergent plugging	Disassemble and clean thoroughly.
	metering valve
	High viscosity of detergent	Dilute detergent to specifications.
	Hole in detergent line(s)	Repair hole.
	Low detergent level	Add detergent if needed.
	Discharge water temperature	Lower discharge water temperature.
	above 180oF.
PUMP RUNNING	Pump sucking air	Check water supply and possibility of air seepage.
NORMALLY BUT
	Valves sticking	Check and clean or replace if necessary.
PRESSURE LOW ON
	Unloader valve seat faulty	Check and replace if necessary.
INSTALLATION
	Nozzle incorrectly sized	Check and replace if necessary (See serial plate for
		proper size).
	Worn piston packing	Check and replace in necessary.
FLUCTUATING	Valves worn	Check and replace if necessary.
PRESSURE
	Blockage in valve	Check and replace if necessary.
	Pump sucking air	Check water supply and air seepage at joints in
		suction line.
	Worn piston packing	Check and replace if necessary.
PUMP NOISY	Air in suction line	Check water supply and connections on suction line.
	Broken or weak inlet or discharge	Check and replace if necessary.
	valve springs
	Excessive matter in valves	Check and clean if necessary.
	Worn bearings	Check and replace if necessary.

97-6068, 97-6131 • REV. 3/06