CHAPTER 4. ORGANIZATIONAL MAINTENANCE INSTRUCTIONS

CHAPTER 4

ORGANIZATIONAL MAINTENANCE INSTRUCTIONS

Section I. SERVICE UPON RECEIPT OF MATERIEL

e. Make sure all parts are clean. If necessary,

4-1. General

wire-brush the upper and lower diaphragm plates

Inspection and servicing of received equipment is

and rinse with water. Remove any sharp edges with

described in paragraph 2-1. New pumps are

a fine file or stone.

shipped from the factory with the diaphragms

f. The natural configuration of the diaphragm is

removed and packed separately. Organizational

dish-shaped. Install the diaphragm on the upper

maintenance is normally responsible for the

diaphragm plate (18) with the bottom of the dish

assembly of the diaphragms into the pumps prior to

toward the floor. Aline the holes in the diaphragm

installation.

with the holes in the upper diaphragm plate and

4-2. Diaphragm Installation

install the lower diaphragm plate (11). Secure with

Install the diaphragm in a new pump as follows:

four nuts (10). Tighten the nuts evenly and

a. With the ignition switch (2, fig. 2-2) in OFF

alternately to prevent diaphragm distortion.

position, turn over the engine so that the diaphragm

g. Position the diaphragm pot (9) on the pump,

plunger is in the bottom position.

taking care that the edges of the diaphragm are

b. Remove the suction and discharge assemblies

evenly spaced around the periphery of the pot and

(para 4-14).

diaphragm ring (20). Secure with nuts (6) and lock

c. Remove the nuts (6, fig. 4-4) and lock washers

w a s h e r s (7). Tighten the nuts evenly and alter-

(7) that secure the diaphragm pot (9) to the

nately to prevent diaphragm distortion.

diaphragm ring (20); remove the diaphragm pot.

h. Install the suction and discharge assemblies

d. Remove the four nuts ( 10) that secure the

( p a r a 4-16).

l o w e r diaphragm plate (11 ) to the upper

i. Turn over the engine and pump a number of

remove

t h e lower

diaphragm plate

(18);

revolutions to make sure all parts are free.

diaphragm plate.

Section II. REPAIR PARTS, SPECIAL TOOLS, AND EQUIPMENT

4-4. Maintenance Repair Parts

4-3. Special Tools and Equipment

Repair parts and equipment are listed and

No special tools or equipment is required for

illustrated in the repair parts and special tools list

organizational maintenance of the reciprocating

covering organizational maintenance for this pump.

pump.

Refer to TM 5-4320-251-24P.

Section III. PREVENTIVE MAINTENANCE CHECKS

A N D S E R V I C E S (QUARTERLY)

4-6. Preventive

Maintenance Checks and

4 - 5 . General

Services

This section lists the preventive maintenance

Refer to table 4-1 for a listing of the preventive

checks and services which shall be performed on a

maintenance checks and services which are

quarterly basis by organizational maintenance

allocated to organizational maintenance. Service

personnel. It includes and expands upon the

the engine as directed in TM 5-2805-257-14.

preventive maintenance services performed daily

by operator/ crew and includes additional services

which are allocated to organizational maintenance.

4-1