CHAPTER 2 DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

TM 10-3930-630-34

CHAPTER 2

DIRECT SUPPORT AND GENERAL SUPPORT

MAINTENANCE INSTRUCTIONS

Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT

direct and general support maintenance personnel for

2-1. Tools and Equipment

performing maintenance on fork lift truck.

Tools and equipment necessary for the repair of the fork

2-3. Maintenance Repair Parts

lift truck, are authorized by Tables of Allowances (TA)

and equipment (TOE).

Repair parts and equipment authorized for direct and

general support maintenance is listed in TM 10-3930-

2-2. Special Tools and Equipment

630-34P.

No special tools and equipment are required by

Section II. TROUBLESHOOTING

b. This manual cannot list all malfunctions that

2-4. General

may occur, nor all tests, inspections, or corrective

a. This section contains troubleshooting

actions. If a malfunction is not listed or corrected by

information for locating and correcting most of the

listed corrective actions, notify your supervisor.

troubles which may develop in the fork lift truck. Each

malfunction for an individual component, unit, or system

2-5.

Troubleshooting Table

is followed by a list of tests or inspections which will help

you determine probable causes and the corrective

Refer to table 2-1 for troubleshooting malfunctions, tests

action to take. Perform the tests, inspections, and

or inspections to be completed and the recommended

corrective

actions

the

order

listed.

corrective action.

Table 2-1. Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ENGINE MISSES.

Step 1.

Check valves for warping.

Replace warped valves (para 11-4).

Step 2.

Check for sticking valves.

Clean stem and guide. Grind valve if necessary.

2. ENGINE KNOCKS.

Step 1.

Check for loose connecting rod bearings if it is a sharp knock and oil pressure is low.

Replace bearings (para 11-18).

Step 2. Check for loose main bearings if it is a heavy knock and oil pressure is low.

Replace main bearings (para 11-36).

Step 3. Check for loose piston pins if it is a sharp double knock.

Replace pins or bushings (para 11-18).

Step 4. Check for worn pistons or cylinders.

Replace pistons and rings (para 11-18).

3. ENGINE LOSES POWER.

Step 1. Check for leaking valves and low compression.

Adjust or grind valves (para 11-4).

Step 2. Check for worn or sticking piston rings.

Replace piston rings (para 11-18).

2-1