APU PRIMARY FUEL FILTER -706880653

TM 5-4210-233-14&P-1

4-210. APU PRIMARY FUEL FILTER

This task covers:

a. Removal

c. Follow-on Maintenance

b. Installation

TOOLS REQUIRED

EQUIPMENT CONDITION

Tool Kit, General Mechanics, Automotive

Main Engine Shutdown (see para 2-12.)

(Appendix B, Section III, Item 1)

APU Shutdown (see para 2-16.)

Batteries Disconnected (see para 4-114.)

MATERIALS/PARTS REQUIRED

Diesel Fuel (Item 41, Appendix E)

Primary Fuel Filter (Figure 212, Appendix F)

a. Removal.

CAUTION

Due to the precise tolerances of di sel injec-

tion systems, it is extremely important the fuel

be kept clean. Dirt or water in the system can

cause severe damage to both the injection

pump and the injection nozzle.

CAUTION

When removing or installing drain plug on fuel

filter, use two wrenches in combination for

breaking plug loose and for final tightening.

(1) Remove drain plug (1) and drain primary filter (2).

(2) Remove bolt (3) and washer (4).

(3) Remove primary fuel filter (2).

b. Installation.

(1) Clean filter mounting area and moisten filter

gasket with diesel fuel (Item 41, Appendix E).

(2) Install new primary fuel filter until gasket touches

mounting base then tighten 1/4 to 1/2 turn.

(3) Install bolt (3) and washer (4).

(4) Install drain plug (1).

c. Follow-on Maintenance.

(1) Connect batteries (see para 4-114).

(2) Prime fuel system and start and operate APU (see

para 2-16) and check for leaking. Tighten filter

in small increments till leaking ceases.

4-524