Section III. GENERAL MAINTENANCE - TM-5-4320-272-340015

Section III. GENERAL MAINTENANCE

d. Protect disassembled parts from blowing sand

2-5. General

This section contains general maintenance procedures

and dust which could later cause rapid wear of the

which are the responsibility of direct support and gen-

gears, bearings, and machined surfaces.

eral support maintenance personnel. The paragraphs

2-7. Care of Bearings

contained herein describe general practices you will

a. You can clean ball and roller bearings by placing

find applicable to several asssermblies or components

them in a wire basket and immersing in a container of

of the pumping assembly which would otherwise have

fresh cleaning solvent. Agitate the bearings in the sol-

to be repeated in each section of the manual assigned

vent to remove all traces of old lubricant.

to those assemblies and components.

b. After the bearings are cleaned, dry them with

clean, filtered compressed air. Take care to prevent

2-6. Cleanliness

a. Take care to assure that your work area is clean

spinning the bearings when you use a compressed air

jet.

before starting to disassemble the engine or pump

c. Dip the cleaned bearings in clean engine oil and

parts.

immediately wrap them in lint-free paper to prevent

b. Clean the exterior of the engine or pump before

starting disassembly to prevent the dirt from entering

the entry of dust and dirt.

the bearings. Clean the exterior of engine components

2-8. Seals and Gaskets

with a cloth dampened with cleaning solvent (fed.

Replace seals and gaskets of all components you disas-

spec. P-D-680).

semble. The use of new gaskets and seals will greatly

c. If you clean the parts with compressed air, make

reduce the possibility of leaking and will help prevent

sure it is free from dirt and contaminants.

the entry of dust and dirt after reassembly.

Section IV. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS AND ASSEMBLIES

(5) Disconnect the fuel lines connecting the

2-9. Centrifugal Pump.

engine to the fuel tank.

a. Removal. Remove the centrifugal pump from

(6) Remove the cap screws (5), flat washers (6),

the engine and trailer as follows:

nuts (3), and lock washers (4) that secure the engine to

(1) Disconnect and remove the instrument

the trailer frame. Use a suitable lift to lift the engine

panel (TM 5-4320-272-12).

from the wedded frame. Take care that you support

(2) Remove the plug (11, fig. 4-1), to drain the

engine under structural members only.

pump.

b. Installation.

(3) Remove suction and discharge pipe assem-

(1) Use a lift to position the engine on the

blies (TM 5-4320-272-12).

welded frame. Take care that you support the engine

(4) Further removal procedure requires that

under structural members only. Secure the engine to

you disassemble the pump completely. Refer to para-

the welded frame with cap screws (5, fig. 3-13), flat

graph 4-3 a.

washers (6), nuts (3), and lock washer (4).

b. Installation. Refer to paragraph 4-3 c.

(2) Install the fuel lines connecting the engine

to the fuel tank.

2-10. Engine.

(3) Install and connect the oil tube (2) from the

a. Removal. Remove the engine from the cen-

engine block to the oil pressure switch and pressure

trifugal pump and welded frame as follows:

gage.

(1) Remove the centrifugal pump (para 4-3 a).

(4) With drain plug in place, you can refill the

(2) Disconnect the battery leads at the battery.

crankcase with oil; refer to TM 5-4320-272-12.

This will prevent your accidental shorting, grounding,

(5) Connect the battery leads.

or reverse-polarizing of the electrical system.

(6) Install the centrifugal pump (para 4-3 c).

(3) Remove drain plug (1, fig. 3-13) and drain

engine oil into suitable container.

2-11. Axle Assembly

a. Removal.

(4) Disconnect and remove oil tube (2, fig. 3-

(1) Hoist each end of the frame and install block-

13) from engine block to oil pressure switch and pres-

ing under it so that the wheels just clear the ground.

sure gage.

2-3