Kärcher G 4000 OH Manual page 15

Symptom
No detergent.
Garden hose
connection
leaks.
Spray wand
leaks.
Pump is noisy.
Water leaks from
pump (up to 10
drops per minute
is permissible).
Oil Drip.
Cause
Detergent suction tube not
properly connected to the
machine.
Detergent is too thick.
Filter on detergent suction
tube is clogged.
Detergent filter valve is at
lowest setting.
Damaged or clogged deter-
gent suction tube.
A high pressure nozzle is
attached.
Spray nozzle is obstructed. Blow out or remove debris with fine
Loose fittings.
Missing/worn rubber wash-
er.
Spray wand not properly at-
tached.
Broken o-ring or plastic in-
sert.
Pump is sucking air.
Loose fittings.
Water seals are damaged
or worn.
Thermal protection device
is activated.
Oil seals are damaged or
worn.
Solution
Check connection.
Dilute detergent, for best results
use Kärcher
®
Run warm water through filter to re-
move debris.
Set detergent filter valve to a higher
setting.
Remove obstruction or replace de-
tergent suction tube.
Replace with black detergent noz-
zle.
needle.
Tighten fittings.
Insert new washer.
Turn the swivel nut of the gun clock-
wise until connection is tight.
Call Customer Support
Check that hoses and fittings are air
tight. Turn off machine and purge
pump by squeezing trigger gun until
a steady flow of water emerges
through the nozzle.
Tighten fittings.
Call Customer Support
Thermal protection device will auto
reset. Do not run pump for more
than 5 minutes without spraying.
Call Customer Support
15
detergent.