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20
TROUBLESHOOTING GUIDE
NOTE: Probable causes are listed with most likely cause first Repairs should be made by
qualified techniciansonly.
POWER SYSTEM: GASOLINE OR DIESEL DRIVEN
Problem Probable Cause Remedy
Engine will not start or
crank over (see Engine
Owner's Manual for further
engine troubleshooting)
Battery dead Where
applicable
Charge or replace battery,
add electrolyte if battery is
new
Dirty Battery Contacts Clean connections
Battery cables disconnected Connect or replace damaged
cables
Engine, pump, or gearbox is
seized
Identify, Replace or repair
seized part
Key switch, solenoid or
starter on engine defective
Repair or replace faulty
component
Pump is seized Replace pump or bearing
Engine will not start but
will crank over (see Engine
Owner's Manual for further
engine troubleshooting)
Engine power switch is off or
defective
Check engine power switch
Low oil shut down is
activated
Add oil to engine, check
more frequently
Low on fuel Fill with the appropriate
fuel, bleed injector pump on
diesel engines
Fuel filter is clogged Replace or clean fuel filter,
bleed injector pump on
diesel engines
Engine flooded or starved Choke only as required (not
applicable to diesels)
Old or dirty fuel Drain and replace with new
fuel
Engine bogs down under
load, whenever spray gun
is triggered (see Engine
Owner's Manual for further
engine troubleshooting)
Engine needs to be repaired
or replaced
See engine manual or engine
dealer
Operating in high elevation Lower the pressure on the
unit and check for correct
engine speed (RPM)
Incorrect nozzle in lance Replace with correct nozzle
size
Unloader valve improperly
adjusted
Adjust unloader valve
Carbon deposits on cylinder
head
Remove head and clean off
deposits
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