Mi-T-M HMT-4004-0MGV Manual Del Operador página 26

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