Kärcher K 3.78 Operator's Manual page 12

TROUBLESHOOTING – continued
Symptom
No detergent.
Garden hose
connection leaks.
12
Spray wand leaks.
Pump is noisy.
Water leaks from pump (up
to 10 drops per minute is
permissible).
Oil Drip.
In USA Call:
or visit our website: www.karcher-usa.com
Cause
Detergent suction tube not properly
connected to the machine.
Detergent is too thick.
Filter on detergent suction tube is
clogged.
Damaged or clogged detergent
suction tube.
Spray wand is in high pressure
position.
Discharge nozzle is obstructed.
Loose fittings.
Missing/worn rubber washer.
Spray wand not properly attached.
Broken o-ring or plastic insert.
Pump is sucking air.
Loose fittings.
Water seals are damaged or worn.
Oil seals are damaged or worn.
1-800-537-4129
Solution
Check connection.
Dilute detergent, for best results
use Kärcher detergent.
Run warm water through filter to
remove debris.
Remove obstruction or replace
detergent suction tube.
Turn spray wand tip to low
pressure position.
Blow out or remove debris with
fine needle.
Tighten fittings.
Insert new washer.
Insert the spray wand into the trig-
ger gun. Carefully press in against
the spring tension and twist into
the locked position.
Call Kärcher customer service
"hotline and order repair kit "(part
no. 2.883-111.0).
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.
Check that all fittings are tight.
Call service center.
Call service center.
If you encounter any additional
difficulties not listed, please call our
service center for help.
Karcher Customer Support USA