SERVICE
TROUBLESHOOTING
PROBLEM
Low Pressure | Worn nozzle. |
| Belt slippage. |
| Air leak in inlet plumbing. |
| Relief valve stuck, partially |
| plugged or improperly |
| adjusted; valve seat worn. |
| Tank outlet filter clogged. |
| Worn packing. Abrasives in |
| pumped fluid or severe cavita- |
| tion.Inadequate water supply. |
IFouled or dirty inlet or discharge | |
1 | valves. |
Worn inlet or discharge valve. | |
| Leaky discharge hose. |
| Restricted inlet or air entering |
| the inlet plumbing. |
| Inlet restrictions and/or air |
| leaks. Stuck inlet or discharge |
| valve. |
| Leaking high pressure seals. |
Water leabge.from under | Worn packing |
manifold. |
|
Water in pump crankcase. | May be caused byhumid air |
Replace with nozzle of proper size.
Xghten or replace; use correct belts andreplan all three at the same time.
Disassemble, reseal, and reassemble.
Clean, and adjust relief valve; check for worn and dirty valve seats. Kit available.
Clean. Check more frequently.
Install proper filter. Check flow available to
pump.
Clean inlet and dischargevalve assemblies
Replace worn valves, valve seats and/or discharge hose.
Proper size inlet plumbing; check for air tight
seal.
Clean out foreign material, replace worn valves.
Replace seals
Install new packing
Change oil at 3rnonthor500Hour intervalsusing Crankcase Oil (other approved oil every monthor
200hours1 P/N 801-144.
Strong surging at the inlet and owl pressure on the discharge side.
Electric motor stops while Ispraying.
Electric motor labors when starting; blows fuses.
Scored plungers.
Over pressure to inlet manifold. Damaged or worn plungers.
Abrasive material in the fluid being pumped.
Excessive pressure and/or temperature of fluid being pumped.
Over pressure of pumps.
Running pump dry.
Foreign particles in the inlet or discharge valve, or worn inlet and/or discharge valves.
Building circuit fuse blown. Overload switch has opened.
Building circuit fuse blown.
Overload switch has opened.
Tip plugged.
Not wired properly,
Replace plungers.
Reduce inlet pressure.
Replace plungers.
Install proper filtration on pump inlet plumbing.
Check pressures and fluid inlet temperature; be sure they are within specified range. Pump will overheat if run for over 10 minutes without spraying.
Check tip size. Use only proper tip. Do not run Dum0 without water.
Check forsmooth lap surfaces oninlet and . discharge valve seats. Discharge valve seats and inlet valve.seats may be lappedon a veryfine 011 stone.
Check, replace or reset.
Shut unit off, hold gun open, restart.
:heck, replace or reset.
Shut unit off, relieve. ,
qemove and clean.
3eplace capacitor.
See wiring diagram.
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