18
Work Pro WCW-Series Operator’s Manual
TROUBLESHOOTING
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine will not start.
Various engine problems.
Refer to the Engine Manual
accompanying your unit.
Unit components are frozen.
Allow to thaw. If any part of the unit
becomes frozen; excessive
pressure may build up in the unit
which could cause the unit to burst
resulting in possible serious injury to
the operator or bystanders.
No discharge at nozzle when
Inadequate water supply.
Ensure hose is 3/4" diameter and
trigger mechanism is squeezed.
incoming water supply is turned on.
Low or fluctuating pressure.
Kink in water inlet hose.
Remove kink.
Kink in high pressure discharge hose.
Replace hose.
Water inlet strainer obstructed.
Remove strainer, clean or replace.
Pump sucking air. (Prime eliminated)
Tighten all water intake connections
Eliminate leaks in intake line.
Not in high pressure mode.
Insert high pressure nozzle.
Obstructed or worn spray nozzle.
Remove, clean or replace.
Damaged or obstructed valve assy.
Remove, inspect, clean or replace.
on pump.
Pump packings worn.
Replace packings.
Unloader valve not operating correctly.
Repair or replace.
Water is leaking from the "Heat
Water temperature is too high.
Do not allow the unit to operate in
Dump Valve"
the bypass mode (with trigger gun
closed) for more than 3 minutes.
Defective valve.
Replace.
Oil appears milky or foamy.
Water in oil.
Change pump oil. Fill to proper
level.
Oil leaking from unit.
DO NOT USE!!!!!
Contact Mi-T-M Customer Service.
Detergent will not siphon into
Detergent strainer is not completely
Check, submerge if necessary.
Low Pressure Detergent mode.
submerged in detergent solution.
Detergent strainer obstructed.
Inspect, clean or replace.
Detergent hose cut, obstructed or
Inspect, clean or replace.
kinked.
Detergent adjusting knob turned to
Open adjusting knob. Refer to
closed position.
"Cleaning with Detergents" pg. 15
Not in low pressure mode.
Insert 6540° (BLACK) nozzle.
Too many high pressure hose
Use one extension maximum.
extensions attached to the water outlet.
Nozzle assembly is plugged.
Clean or replace.
Ball & Spring in Venturi stuck.
Remove, clean or replace.
Water flows back into detergent
Ball & Spring in Venturi reversed,
Remove, clean or replace.
container.
missing or corroded.
Water flows from the nozzle when the
Trigger gun is malfunctioning.
Repair or replace.
trigger gun is locked in the "OFF"
position.
