8/05/08
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Section 12: Troubleshooting
4220ST & 4420ST Light Utility Vehicles 700-504M
Table of Contents
Engine stops running
Gas tank is empty.
Refill gas tank.
Spark Plug wiring is defective.
Replace spark plug wiring.
Ignition switch is defective.
Replace ignition switch.
Battery is worn out or defective.
Replace battery.
Crankshaft is broke.
Replace broken crankshaft.
Shift Selector is malfunctioning
Foot feed throttle spring is loose or
broken.
Reattach disconnected foot feed
spring. Replace defective spring.
Throttle cable is sticking.
Clean and oil throttle cable. Replace
worn or damaged cable.
Engine idle return spring is loose or
broken.
Reattach disconnected engine idle
spring. Replace defective spring.
Engine idle set too high.
Readjust engine idle.
(1250 to 1350 RPM)
Governor spring is loose or broken.
Reattach disconnected governor
spring. Replace defective spring.
Drive Clutch does not disengaged.
Clean drive clutch by blowing air
through it.
Shift selector jumps out of gear.
With shift selector in neutral, adjust
shifter link at engine to be in neutral
position.
Park brake doesn’t work
Park brake cable is not adjusted
correctly.
Adjust park brake cable at the caliper.
Park brake cable is broken.
Replace park brake cable.
Park brake cable is jammed with debris.
Clean debris from park brake cable.
Starter cranks slowly
Battery power is low.
Recharge battery.
Battery connections are loose or
corroded.
Clean and tighten battery connections.
Battery is worn out or defective.
Replace battery.
Harness connections are loose.
Reconnect harness connections.
Harness pin connections are bent.
Straighten harness pins.
Harness is defective.
Replace harness.
Ignition switch is defective.
Replace ignition switch.
Starter is defective.
Replace starter.
Engine oil is too heavy.
Replace with SAE 10W30 oil.
Symptoms
Probable Causes
Suggested Remedies
