26
HMT-4004-0MGH Operator's Manual
TROUBLESHOOTING
SYMPTOM
PROBABLE CAUSE
REMEDY
Engine will not start.
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 result-
ing in possible serious injury to the operator or
bystanders.
No discharge at nozzle
when trigger mecha-
nism is squeezed.
Inadequate water supply.
Ensure hose is 3/4" diameter and incoming water
supply is turned on.
Low or fluctuating
pressure.
Kink in water inlet hose.
Remove kink.
Water inlet screen obstructed.
Remove screen, clean or replace.
Pump sucking air. (Prime eliminated)
Tighten all water intake connections. Eliminate
leaks in intake line.
Eliminate leaks in intake line.
Insert high pressure nozzle.
Obstructed or worn spray nozzle.
Move adjustable grip on dual lance counter-
clockwise to high pressure.
Damaged or obstructed valve assy.on
pump.
Remove, clean or replace.
Pump packings worn.
Remove, inspect, clean or replace. Replace
packings.
Unloader/bypass valve not operating
correctly.
Repair or replace.
Pump oil appears
milky or foamy.
Water in oil.
Change pump oil. Fill to proper level.
Oil leaking from unit.
Worn seals or o-rings.
Contact Service Department.
Water is leaking at
safety relief valve.
Unloader malfunction.
Detect and correct unloader problem.
Pressure switch malfunction.
Detect and correct pressure switch problem.
Safety Relief Valve is defective.
Replace safety relief valve. NEVER run unit
without safety relief valve. Doing so can cause
an explosion!
Water flows from the
nozzle when the trigger
gun is locked in the
OFF position.
Trigger gun is malfunctioning.
Repair or replace.
Blower motor will not
run. (Burner will not
ignite without blower
running)
Burner/Blower motor malfunction.
Repair or replace.
Содержание HMT-4004-0MGH
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