V 4.0
4.2 GPM @ 4,000 PSI Gas Pressure Washer
8643926
Visit www.princessauto.com for more information
25
Problem(s)
Possible Cause(s)
Suggested Solution(s)
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
authorized dealer.
Water leaking at
spray gun/spray
wand
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. Piston packing is
worn.
3. Worn or broken O-
rings.
4. Pump head or tubes
damaged from
freezing.
1. Tighten connections.
2-4. Have parts cleaned or replaced by
authorized 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
authorized dealer.
2. Tighten drain plug.
3. Inspect and replace O-ring.
4. Inspect and replace O-ring.
5. Check for correct amount.
6. Drain and refill with correct type and
amount of oil.
7. Clean vent plug. Use air hose to free it of
blockage. If problem persists, replace
vent plug.
Pump pulsates. Nozzle obstructed.
See Check Spray Wand and Pressure
Nozzles section.
