FAQs
TROUBLESHOOT GUIDE
Possible Cause(s) |
Corrective Action |
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POWER WASHER GUN Leak |
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Not use Teflon tape. |
Wrap the male thread of the 1/4" quick socket with Teflon tape, then connect it to the gun, and finally, tighten it securely with a wrench. |
| The O-ring in the 1/4 quick socket is damaged or missing. | Disassemble and replace a new 1/4'' male NPT to 1/4'' socket adapter. |
| The connector and the gun are not tightly connected. | Tighten it with a wrench. |
| Leaks between the hose and adapter. | Wrap the male thread of the M22 to 3/8'' quick socket with Teflon tape. |
| To prevent water leakage, replace old or missing O-rings with new ones. | |
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POWER WASHER GUN Low pressure |
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The nozzle is clogged. |
Detach the quick connect nozzle from the wand. Use a small wire rod (paper clip) to loosen up any particles in the quick connect nozzle and flush with water. |
| The water supply is insufficient. | Check if the water tap is fully open. |
| The pressure washer's PSI is low. | Replace the pressure washer nozzles with smaller orifice sizes. |
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POWER WASHER PUMP Low Pressure |
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| Worn nozzle | Replace nozzle, of proper size |
| Belt slippage | Tighten or replace; use correct belt |
| Air leak in inlet plumbing | Disassemble, reseal and reassemble |
| Relief valve studk, partially plugged or improperly adjusted valve seat worn |
Clean, adjust relief valve; check for worn and dirty valve seats. Kit available |
| Inlet suction strainer clogged or improperly sized |
Clean. Use adequate size. Check more frequently |
| Worn packing. Abrasives in pumped fluid or severe cavitation. Inadequate water |
Install proper filter. Suction at inlet manifold must be limited to lifting less than 20 feet of water or -8.5 PSI vacuum |
| Fouled or dirty inlet or discharge valves | Clean inlet and discharge valve assemblies |
| Worn inlet, discharge valve block or dirty / Leaky discharge hose | Replace worn valves, valve seats and/or discharge hose |
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POWER WASHER PUMP Oil leak between crankcase and pumping section |
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| Worn rod oil seals | Replace crankcase piston rod seals |
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POWER WASHER PUMP Frequent or premature failure of the packing |
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| Cracked, damaged or worn plunger | Replace plungers |
| Overpressure to inlet manifold | Reduce inlet pressure |
| Material in the fluid being pumped | Install proper filtration on pump inlet plumbing |
| Excessive pressure and/or temperature of fluid being pumped | Check pressures and fluid inlet temperature; be sure they are within specified range |
| Running pump dry | Do not run pump without water |
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POWER WASHER PUMP Low pressure at nozzle |
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| Unloader valve is by-passing | Make sure unloader is adjusted property and by-pass seat is not leaking |
| Incorrect or worn nozzle | Make sure nozzle is matched to the flow and pressure of the pump. If the nozzle is worn, replace |
| Worn packing or valves | Replace packing or valves |
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POWER WASHER PUMP Loud knocking noise in pump |
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| Cavitation or sucking air | Check water supply is turned on |
| Pulley loose on crankshaft | Check key and tighten set screw |
| Broken or worn bearing | Replace bearing |