22
PUMP TROUBLE SHOOTING GUIDE
PROBLEM
CAUSE
CORRECTION
Pump will not draw
Chemicals
1. Low pressure Nozzle (Black)
not fitted.
2. Chemical filter clogged.
3. Chemical
filter
not
in
chemical.
4. Chemical solution too thick.
5. Pressure hose too long.
6. Chemical build-up in chemical
injector.
1. See Nozzle Selection.
2. Clean filter.
3. Ensure end of chemical hose is fully
submerged into chemicals.
4. Dilute chemical. Chemical solutions
should have same consistency as
water.
5. Lengthen water supply instead of
pressure hose.
6. Have parts cleaned or replaced by
authorised dealer.
No or low pressure
(after period of
normal use).
1. Worn seal or packing.
2. Worn or obstructed valves.
3. Worn unloader piston.
4. Worn E-Z start valve.
Have parts cleaned or replaced by
authorised dealer.
Water leaking at
spray gun/lance
connection.
1. Worn or broken O-ring.
2. Loose hose connection.
1. Check and replace O-ring.
2. Tighten hose connection.
Water leaking at
pump.
1. Loose connections.
2. Pistons packing worn.
3. Worn or broken O-rings.
4. Pump
head
or
tubes
damaged from freezing.
1. Check and replace O-rings.
2. Tighten hose connection.
3. Tighten all connections.
4. Have parts cleaned or replaced by
authorised dealer.
Oil leaking at
pump.
1. Oil seals worn.
2. Loose drain plug.
3. Worn drain plug O-ring.
4. Worn fill plug O-ring.
5. Pump overfilled.
6. Incorrect oil used.
7. Vent plug clogged.
1. Have parts cleaned or replaced by
authorised dealer.
2. Tighten drain plug.
3. Inspect and replace O-rings.
4. Check for correct amount of oil.
5. Drain and refill with correct type and
amount of oil.
6. Clean vent plug, use air hose to free if
blocked, if problem persists replace
vent plug.
Pump pulsates.
Nozzle obstructed.
See “ Nozzle Cleaning” section