Karcher HD 4-0-40 PB Cage - Manual (Page 13)

8.913-996.0 • 8.914-452.0 • 9.807-624.0 • 8.919-013.0 • Rev. 11/13
11
PRESSURE
W
ASHER
T
roub
leshooting Guide
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
LOW OPERATING
PRESSURE Insuffi cient 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 tefl on tape.
Faulty or mis-adjusted unloader
valve Adjust unloader for proper pressure. Install
repair kit when needed. Contact local dealer.
Worn packing in pump Contact local dealer.
Machine has been stored in
freezing temperatures Thaw out machine completely, including hose,
spray gun and wand.
Slow engine RPM Contact local dealer.
FLUCTUATING
PRESSURE Worn or dirty pump valves Contact local dealer.
Nozzle is obstructed Use nozzle wire in accessory kit.
Pump sucking air, inlet hose
leaking Check all pump lines and connections.
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; fi ll 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, contact local
dealer.
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. Contact local dealer.