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TM 10-3930-632-34
CHAPTER 2
DIRECT SUPPORT AND GENERAL SUPPORT
MAINTENANCE INSTRUCTIONS
Section I. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT
equipment are listed in the Repair Parts and Special
2-1.
General
Tools List for Direct Support, General Support and Depot
Maintenance for this equipment, TM 10-3930-632-34P.
a.  Special Tools. No special tools are required to
perform  the  direct  support  and  general  support
maintenance procedures outlined in this manual.
b.  Repair Parts. Repair parts, special tools, and
Section II. TROUBLESHOOTING
take.
Perform the tests/inspections and corrective
2-2.
General
actions in the order listed.
b.  This manual cannot list all malfunctions that
a.  This
section
contains
troubleshooting
may occur, nor all tests or inspections or corrective
information for locating and correcting most of the
actions. If a malfunction is not listed or is not corrected
troubles which may develop in the fork lift truck. Each
by listed corrective actions, notify your supervisor. See
malfunction for an individual component, unit, or system
is followed by a list of tests or inspections which will help
to determine probable causes and corrective actions to
Table 2-1. Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE
1.
ENGINE STARTER OPERATES, BUT FAILS TO CRANK ENGINE WHEN SWITCH IS ENGAGED.
Step 1.
Test starter motor (TM 10-3930-632-12), and inspect drive gear.
Repair starter motor (para 5-8).
2.
ENGINE CRANKS BUT WILL NOT START.
Step 1.
Check carburetor for sticking float.
Disassemble and clean carburetor (para 6-2).
Step 2.
Test engine compression TM 10-3930-632-12).
Adjust engine valves and replace cylinder head gasket (TM 10-3930-632-12). Replace valve spring (para 9-10).
Replace valves (para 9-10). Replace piston rings (para 9-26).
3.
ENGINE OPERATES, BUT BACKFIRES AND SPITS.
Step 1.
Check carburetor float level.
Disassemble carburetor and set float level (para 6-6d ).
Step 2.
Check Timing (TM 10-3930-632-12).
Step 3.
Check for sticking, improperly seated, burned or pitted valve.
Grind or replace valves (para 9-10).
Step 4.
Inspect cylinders for excessive carbon build-up.
Remove carbon from cylinders (para 9-40).
Step 5.
Test valve springs.
Replace weak or broken springs (para 9-10).
4.
ENGINE MISFIRES ON ONE OR MORE CYLINDERS.
Step 1.
Check for valve sticking open.
Replace defective tappet (para 9-10).
Step 2.
Test engine compression (TM 10-3930-632-12).
Refer to "ENGINE CRANKS BUT WILL NOT START" above.
Step 3.
Inspect for cracked cylinder block or broken valve tappet or tappet screw.
Replace defective parts (para 9-10).
2-1

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