Publicidad
Troubleshooting
Fault
Engine not starting or hard to
start
Engine not operating properly
or lacking power
Pressure too low and/or pump
running roughly
Water leaking from under
pump manifold
Water in pump oil
Packings failing frequently or
prematurely
Strong surging at inlet, and low
pressure on discharge side
No detergent is being siphoned
into system
Pressure drop
In suction mode
Original instruction
Cause
- No gasoline in fuel tank or carburetor
- Low oil
- Start/Stop switch in STOP position
- Water in fuel, or old fuel
- Engine flooded or improperly choked
- Dirty air cleaner filter
- Dirty spark plug, wrong gap, or wrong type
- Gun not triggered
- Partially plugged air cleaner filter
- Spark plug dirty, wrong gap, or wrong type
- Worn or wrong size nozzle
- Inlet filter clogged
- Worn packings, abrasives in water, or natural
wear
- Inadequate water supply
- Belts slipping
- Fouled or dirty inlet or discharge valves
- Restricted inlet
- Worn inlet or discharge valves
- Leak in high-pressure hose
- Worn packings
- Humid air condensing inside crankcase
- Worn packings
- Oil seals are leaking
- Scored, damaged, or worn plungers
- Abrasive material in the fluid being pumped
- Inlet water temperature too high
- Over pressurized pump
- Excessive pressure due to partially plugged or
damaged nozzle
- Pump running too long without spraying
- Running pump dry
- Foreign particles in the inlet or discharge valve,
or worn inlet and/or discharge valves
- Incorrect nozzle installed
- Pressure too high
- Worn chemical injector valve
- Air in the system.
- High-pressure nozzle blocked/worn.
- Pressure control on the lance is not set correctly.
- Engine speed too low.
- Lack of water because max. permissible suction
height has not been heeded.
- Pump draws in air (only possible in suction
mode).
Remedy
- Fill the tank with gasoline and open fuel shut
off valve.
- Check fuel line to carburetor.
- Add oil to proper level.
- Move switch to START position.
- Drain fuel tank and carburetor. Use new fuel,
and make sure spark plug is dry.
- Open choke, and crank engine several times
to clear out gas. Make sure spark plug is dry.
- Remove and clean.
- Clean spark plug, adjust the gap, or replace.
- Trigger gun while starting engine.
- Remove and clean.
- Clean spark plug, adjust the gap, or replace.
- Replace with nozzle of proper size
- Clean filter. Check more frequently.
- Check filter. Replace packings.
- Check water flow rate to pump.
- Tighten or replace belts; use correct belts, and
replace both at same time.
- Clean inlet and discharge valve assemblies.
Check filter.
- Check if garden hose is collapsed or kinked.
- Replace worn valves.
- Replace high-pressure hose.
- Install new packings.
- Change oil as specified in Maintenance
chapter.
- Install new packings.
- Install new oil seals.
- Install new plungers.
- Install proper filtration on pump inlet plumbing.
- Check water temperature. It should not ex
ceed 140°F (60°C).
- Do not modify any factory-set adjustments.
- Clean or replace nozzle. See Nozzle Connec-
tion in chapter C.
- Never run pump more than 3 minutes without
spraying.
- Do not run pump without water.
- Clean or replace valves.
- Install chemical/detergent nozzle
- Adjust pressure to lowest point
- Install new chemical injector valve
- Vent the system by operating the spray gun
several times at short intervals. If necessary,
dismount the lance (see section C6).
- Clean/replace the high-pressure nozzle.
- Set the required working pressure.
- Contact Nilfisk Service Department.
- Flood the hose - More info see chapter D.
- Check that the suction set is air-tight. Repeat
aeration.
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Publicidad
