Kärcher 1.103-843.0 Operator's Manual page 22

Maintenance
Troubleshooting
Problem
Incoming water to machine warm or hot
Fuel pump pressure too high
Fuel pump defective
WATER
Detergent line sucking air
TEMPERATURE
TOO HOT
Defective temperature switch
Incorrect fuel nozzle size
Insufficient water supplied
Restricted water flow
Air in suction line
Broken or weak inlet or discharge valve
PUMP NOISY
springs
Excessive matter in valves
Worn bearings
Oil seal worn
PRESENCE OF
WATER IN OIL
High humidity in air
Piston packing worn
O-Ring plunger retainer worn
WATER DRIPPING
Cracked piston
FROM UNDER
PUMP
Pump protector
OIL DRIPPING Oil seal worn
EXCESSIVE
VIBRATION IN Irregular functioning of the valves
DELIVERY LINE
Air leak
Restrictor in float tank is missing
Filter screen on detergent suction hose
DETERGENT NOT
plugged
DRAWING
Dried up detergent plugging metering valve
High viscosity of detergent
Hole in detergent line(s)
Low detergent level
22
Possible Cause
KÄRCHER TRAILER OPERATORS MANUAL • 9.807-794.0-B
Solution
Lower incoming water temperature.
See specifications for proper fuel pressure.
Replace fuel pump.
Tighten all clamps. Check detergent lines for
holes.
Replace.
See specifications for proper fuel nozzle.
Check water G.P.M. to machine.
Check nozzle for obstruction, proper size.
Check water supply and connections on
suction line.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Check and replace if necessary.
Check and change oil twice as often.
Check and replace if necessary.
Check and replace if necessary.
Check and replace if necessary.
Lower water supply pressure. Do not run
with spray gun closed longer than 2 minutes.
Check and replace if necessary.
Check and replace if necessary.
Tighten all clamps. Check detergent lines for
holes.
Replace restrictor. Check for proper orifice
in restrictor.
Clean or replace.
Disassemble and clean thoroughly.
Dilute detergent to specifications.
Repair hole.
Add detergent, if needed.