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Troubleshooting - Kärcher HD 2.3/24 P / CD-23243 Operator's Manual

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PRObLEM
LOW OPERATINg
PRESSURE
fLUCTUATINg
PRESSURE
PRESSURE LOW
AfTER PERIOD
Of NORMAL USE
PUMP NOISE
12

TROUbLESHOOTINg

POSSIbLE CAUSE
Faulty pressure gauge
Insufficient water supply
Old, worn or incorrect spray nozzle
Plumbing or hose leak
Faulty or misadjusted unloader valve
(where applicable)
Worn packing in pump
Fouled or dirty inlet or discharge
valves in pump
Worn inlet or discharge valves
Slow engine RPM
Valves worn
Blockage in valve
Pump sucking air
Worn piston packing
Nozzle worn
Inlet or discharge valves blocked or
worn
Unloader valve seat worn
Air suction line
Broken or weak inlet or discharge
valve springs
Foreign matter in valves
Worn bearings
Excessive temperature of liquid
9.800-087.0 • Rev. 10/09
SOLUTION
Install new gauge.
Use larger garden hose; clean filter washer
at water inlet.
Match nozzle number to machine and/or
replace with new nozzle.
Check plumbing system for leaks. Retape
leaks with teflon tape.
Adjust unloader for proper pressure. Install
repair kit when needed. Note: Tampering
with the factory setting may cause personal
injury and/or property damage, and will void
the manufacturer's warranty.
Install new packing kit.
Clean inlet and discharge valves.
Replace with valve kit.
Set engine speed per specifications (approxi-
mately 2800 RPM - 3400 RPM)
Check and replace if necessary.
Check and clean out if necessary.
Check water supply and suction line for air
seepage at joints.
Check and replace if necessary.
Check and replace if necessary.
Check and clean or replace if necessary.
Check and replace if necessary.
Check water supply and connections on suc-
tion line.
Check and replace if necessary.
Check and clean if necessary.
Check and replace if necessary.
Reduce to below 180°F (75°C)

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