Maintenance; Troubleshooting - Kärcher 1.103-843.0 Operator's Manual

Maintenance

Troubleshooting

Problem
Faulty pressure gauge
Insufficient water supply
Old, worn or incorrect spray nozzle
Belt slippage
Plumbing or hose leak
Faulty or mis-adjusted unloader valve
LOW OPERATING
Worn packing in pump
PRESSURE
Fouled or dirty inlet or discharge valves in
pump
Worn inlet or discharge valves
Obstruction in spray nozzle
Leaking pressure control valve
Slow engine RPM
Pump sucking air
Valves sticking
Unloader valve seat faulty
Little or no fuel
Improper fuel or water in fuel
Clogged fuel line
Plugged fuel filter
Mis-adjusted burner air bands
Little or no fuel pressure from fuel pump
Faulty burner transformer
Disconnected or short in electrical wiring
BURNER WILL
Flex coupling slipping on fuel pump shaft or
NOT LIGHT
burner motor shaft
On-Off switch defective
Heavy sooting on coil and burner can cause
interruption of air flow and shorting of elec-
trodes
Improper electrode setting
Fuel not reaching combustion chamber
20
Possible Cause
KÄRCHER TRAILER OPERATORS MANUAL • 9.807-794.0-B
Solution
Install new gauge.
Use larger supply hose; clean filter at water
inlet.
Match nozzle number to machine and/or
replace with new nozzle.
Tighten or replace; use correct belt.
Check plumbing system for leaks. Re-tape
leaks with Teflon tape.
Adjust unloader for proper pressure. Install
repair kit when needed.
Install new packing kit.
Clean inlet and discharge valves.
Replace with valve kit.
Remove obstruction.
Rebuild or replace as needed.
Set engine speed at proper specifications.
Check water supply and possibility of air
seepage.
Check and clean or replace if necessary.
Check and replace if necessary.
Fill tank with fuel.
Drain fuel tank and fill with proper fuel.
Clean or replace.
Replace as needed.
Readjust air bands for clean burn.
Increase fuel pressure to specification and/
or replace fuel pump. Test with pressure
gauge.
Test transformer for proper arc between
contacts. Replace as needed.
All wire contacts should be clean and tight.
No breaks in wire.
Replace if needed.
Check for electrical current reaching burner
assembly with burner switch on.
Clean as required.
Check and reset according to diagram in
Operator's Manual.
Check fuel pump for proper flow. Check
solenoid flow switch on machines with spray
gun control, for proper on-off fuel flow
control.