Kärcher 1.575-615.0 Operator's Manual page 17

PROBLEM
LOW WATER
TEMPERATURE
WATER
TEMPERATURE
TOO HOT
PUMP NOISY
PRESENCE OF
WATER IN OIL
WATER DRIPPING
FROM UNDER
PUMP
TROUBLESHOOTING
POSSIBLE CAUSE
Improper fuel or water in fuel
Low fuel pressure
Weak fuel pump
Fuel fi lter partially clogged
Soot build-up on coils not allowing
heat transfer
Improper burner nozzle
Incoming water to machine warm
or hot
Fuel pump pressure too high
Fuel pump defective
Detergent line sucking air
Defective temperature switch
Incorrect fuel nozzle size
Insuffi cient water supplied
Restricted water fl ow
Air in suction line
Broken or weak inlet or discharge
valve springs
Excessive matter in valves
Worn bearings
Oil seal worn
High humidity in air
Piston packing worn
O-Ring plunger retainer worn
Cracked piston
Pump protector
9.800-103.0 - M • Karcher HDS 615-617
SOLUTION
Replace with clean and proper fuel.
Increase fuel pressure.
Check fuel pump pressure. Replace pump if
needed.
Replace as needed.
Clean coils.
See nozzle specifi cations. (page 30)
Lower incoming water temperature.
See specifi cations for proper fuel pressure.
Replace fuel pump.
Tighten all clamps. Check detergent lines for
holes.
Replace.
See specifi cations for proper fuel nozzle.
(page 30)
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
17