Landa SLT/SLX • Gas 8.914-002.0 • Rev. 4/13
PRESSURE
W
ASHER
Tr
oub
leshooting Guide
16
TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
SOLUTION
LOW OPERATING
PRESSURE
Faulty pressure gauge
Install new gauge.
Insufficient water supply
Use larger supply hose; clean filter at water
inlet.
Old, worn or incorrect spray nozzle Match nozzle number to machine and/or
replace with new nozzle.
Belt slippage
Tighten or replace; use correct belt.
Plumbing or hose leak
Check plumbing system for leaks. Retape
leaks with teflon tape.
Faulty or misadjusted unloader
valve
Adjust unloader for proper pressure. Install
repair kit when needed.
Worn packing in pump
Install new packing kit.
Fouled or dirty inlet or discharge
valves in pump
Clean inlet and discharge valves.
Worn inlet or discharge valves
Replace with valve kit.
Leaking pressure control valve
Rebuild or replace as needed.
Slow engine RPM
Set engine speed at proper specifications.
Pump sucking air
Check water supply and possibility of air
seepage.
Gasoline engine altitude
The gasoline engine is preset for operation
at altitudes below 1000 feet above sea level.
If operated at higher altitudes, it may be
necessary to install a high altitude main jet in
the carburetor. Contact your local authorized
engine sales and service center for details.
Valves sticking
Check and clean or replace if necessary.
Unloader valve seat faulty
Check and replace if necessary.
BURNER WILL
NOT LIGHT
(Continued on next
page)
Little or no fuel
Fill tank with fuel.
Improper fuel or water in fuel
Drain fuel tank and fill with proper fuel.
Clogged fuel line
Clean or replace.
Plugged fuel filter
Replace as needed.
Misadjusted burner air bands
Replace air bands for clean burn.
Little or no fuel pressure from fuel
pump
Increase fuel pressure to specifications and/or
replace fuel pump. Test with pressure gauge.
Faulty burner transformer
Test transformer for proper arc between
contacts. Replace as needed.
Disconnected or short in electrical
wiring
All wire contacts should be clean and tight. No
breaks in wires.
Flex coupling slipping on fuel
pump shaft or burner motor shaft
Replace if needed.
On-Off switch defective
Check for electrical current reaching burner
assembly with burner switch on.
Heavy sooting on coil and burner
can cause interruption of air flow
and shorting of electrodes
Clean as required.
Improper electrode setting
Check and reset according to diagram in
Operator’s Manual
