CHAPTER 2 DIRECT SUPPORT AND GENERAL SUPPORT

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

Table 2-1

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

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).

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).

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).

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