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TROUBLE-SHOOTING - TM-10-3930-622-140067
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TM-10-3930-622-14 Truck Fork Lift; Gasoline Engine Driven; Pneumatic Tires; 6000-lb Capacity; 173-In. Lift Manual
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TROUBLE-SHOOTING - continued - TM-10-3930-622-140069
TROUBLE
PROBABLE CAUSE
REMEDY
9. Lack of oil.
Fill crankcase to proper level.
10. Exhaust pipe restricted.
Clean and remove restriction.
f. Engine temperature too
1. Defective thermostat.
Replace.
low (overcooling)
2. Weather or climatic conditions
Cover radiator sufficiently to
too cold to allow thermostat
bring coolant into proper range
to hold temperature.
or use winter front.
g. Engine overspeeds.
1. Defective governor.
Replace or overhaul governor.
h. Engine noises.
(1) Sharp ping.
1.
Wrong ignition timing.
Adjust ignition timing.
2.
Wrong grade of fuel.
Fill tank with proper grade of fuel.
3.
Excessive carbon deposits.
Overhaul or replace engine.
(2) Sharp hollow slap
1.
Worn pistons.
Overhaul or replace engine.
when starting.
(3) Continuous knock
1. Loose piston pins.
Overhaul or replace engine.
timed with engine RPM
2. Loose connecting rods.
Overhaul or replace engine.
(4) Dull, heavy pounding
1. Worn or burned out main bearings.
Overhaul or replace engine.
timed with engine RPM
(5) Continuous squeal or
1. Lack of lubrication at generator,
Lubricate.
squeak.
water pump or distributor.
(6) Intermittent squeal or
1. Loose drive belt.
Tighten belt.
squeak.
i. Low oil pressure indication.
1. Insufficient oil.
Fill crankcase properly.
2. Oil too thin.
Drain and refill with proper grade
of oil.
3. Oil line leaking.
Tighten connections or replace
oil line.
4.
Pump screen clogged.
Clean or replace pump screen.
5.
Restricted oil line.
Clean or replace line.
6.
Defective pressure gauge.
Replace gauge.
7.
Oil pump defective.
Replace or overhaul oil pump.
j. Excessive oil
1.
Leak in oil lines.
Tighten or replace oil lines.
consumption.
2.
Leaking oil seal.
Replace seal.
3.
Defective gasket.
Replace gasket.
4.
Piston rings worn, broken or
Overhaul or replace engine.
frozen.
5. Cylinder wall worn or scored.
Overhaul or replace engine.
6. Excessively tight crankshaft
Overhaul or replace engine.
5-85. IGNITION SYSTEM.
a. No spark.
1. Defective breaker points.
Adjust or replace points.
2. Defective coil.
Replace coil.
3. Defective ignition wiring.
Test wiring; replace as
necessary.
44

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