Chapter 2. DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE INSTRUCTIONS

CHAPTER 2

DIRECT SUPPORT AND GENERAL SUPPORT

MAINTENANCE INSTRUCTIONS

Section I. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT

in the repair parts and special tools list covering direct

2-1. Special Tools and Equipment

You do not require any special tools or equipment for

support and general support maintenance for this cen-

trifugal pump. Refer to TM 5-4320-272-34P when you

the repair and maintenance of the pumping assembly.

need replacement parts information.

2-2. Maintenance Repair Parts

Repair parts and equipment are listed and illustrated

Section II. TROUBLESHOOTING

listed or is not corrected by listed corrective actions,

2-3. General

notify your supervisor.

a. This section contains troubleshooting informa-

c. Only those functions which are solely within the

tion for locating and correcting most of the operating

scope of direct and general support maintenance are

troubles which may develop in the pumping assembly.

listed. For troubleshooting procedures which are

Each malfunction for an individual component, unit,

within the scope of operator/crew and organizational

or system is followed by a list of tests or inspections

maintenance, you should refer to TM 5-4320-272-12.

which will help you to determine probable causes and

corrective actions to take. Perform the tests/inspec-

2-4. Direct Support and General Support Mainte-

tions and corrective actions in the order listed.

nance Troubleshooting

b. This manual cannot list all malfunctions that

Refer to table 2-1 for troubleshooting which is allo-

may occur, nor all tests or inspections, or corrective

cated to direct support and general support mainte-

actions. If you experience a malfunction which is not

nance levels.

Table 2-1. Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ENGINE

1. ENGINE FAILS TO TURN OVER WHEN STARTER BUTTON IS DEPRESSED.

Step 1. Check to see if impeller is binding involute.

Disassemble the pump and free impeller (para 4-3).

Step 2. Check for seized engine.

Remove engine (para 2-10). Repair engine as necessary (refer to chap.3).

2. ENGINE TURNS OVER BUT DOES NOT START.

Test for low engine compression.

Refer to malfunction 3 for corrective action.

3. LOW OR UNEVEN COMPRESSION.

Step 1. Check for damaged cylinder head gasket or loose cylinder head by listening for hissing noise or

compression stroke.

Replace head gasket and tighten cylinder head bolts to proper torque.

Step 2. Check for sticking or improperly seating valve.

Free stuck valves. Clean, regrind, or replace burned valves as necessary (para 3-17).

2-1