Kärcher HD 3.5/35 G, Operator'S Manual

Page: 13 / 21

9.801-759.0 - B - Operator's Manual, Catch Up
13
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
TROUBLESHOOTING
For Models: HD 3.0/27 G, HD 3.5/35 G, HD 4.0/40 G, HD 4.0/40Ge
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE
Insufficient water supply. Closed
faucet. Inlet hose kinked Use larger garden hose; clean inlet water
screen. Open faucet.
Clogged inlet hose strainer Check plumbing system for leaks. Retape
leaks with teflon tape.
Faulty or mis-adjusted unloader
valve Adjust unloader for proper pressure. Install
repair kit when needed. Call local distributor.
Worn packing in pump Call Dealer Customer Support.
Machine has been stored in freez-
ing temperatures Thaw out machine completely, including
hose, spray gun and wand.
Slow engine RPM Call local distributor.
FLUCTUATING
PRESSURE Worn or dirty pump valves Call local distributor.
Nozzle is obstructed Blow out or remove debris with fine needle.
Pump sucking air, inlet hose
leaking Check that all hoses and fittings are airtight.
Turn off machine and trigger spray gun until
a steady flow of water emerges through the
nozzle.
Insufficient water supply Turn water on full force. Check garden hose
for kinks, leaks or blockage.
PRESSURE LOW
AFTER PERIOD OF
NORMAL USE
Nozzle worn Replace nozzle.
Unloader valve worn Replace unloader valve.
ENGINE WILL NOT
START OR STOPS
WHILE OPERATING
Low oil shutdown Fill engine with oil.
Out of gas Fill fuel tank.
Water in gasoline Drain gas tank; fill with clean fuel.
ENGINE IS
OVERLOADED
Nozzle partially blocked Clean nozzle.
Excessive pressure from high
engine RPM Adjust engine throttle to lower RPM.
WATER OR OIL
LEAKING FROM
BOTTOM OF PUMP A small amount of leaking is
normal If excessive leaking occurs, call local
distributor.
PRESENCE OF
WATER IN PUMP OIL Water sprayed at machine Change oil. Direct spray away from machine.
High humidity in air Check and change oil twice as often.
Piston packing worn. Oil seal worn. Call local distributor.