TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 557 of 1275

TM 9-2350-311 -20-1

SECTION 1. FUEL SYSTEM

6-1 HOSES, TUBES, AND FITTNGS

This task covers:

Removal/installation

Tools

Silicone compound (item 19, A

PPX

D)

General mechanic’s tool kit (item 64, A

PPX

H)

. .

Equipment Conditions

Materials/Parts

Powerplant removed (para 4-5)

Gasket (item 120, Appx G)

Fuel tanks drained (TM 9-2350-311-1 O)

Lockwashers (10) (item 95, Appx G)

(de-fueling tanker may be required)

Lockwashers (4) (item 192, Appx G)

Removal/lnstallation

Do not use open flame or smoke when working on the fuel system. An explosion may

occur, causing severe injury or death.

For removal/installation, follow illustration and legend as a guide. During installation, use silicone compound on pipe

threads (only). Secure loop clamp (14) using existing screw on thermostat housing.

LEGEND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

6-2

Upper fuel tank

Upper tank fuel level transmitter

Fuel filler cap gasket*

Fuel tank filler neck and cap

Adapter

Tee

Adapter

Lower fuel tank breather hose

Hose clamp

Upper-to-lower drain tank main drain

Hose flange

Coupling clamp

Elbow

Loop clamp (10)

Engine-to-lower fuel tank hose

(engine model 7083-7396)

Engine-to-lower fuel tank hose

(engine model 7083-7391)

Elbow

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

Adapter

Coupler (male)

Coupler (female)

Adapter

Lower fuel tank return hose

Elbow

Fuel pump

Elbow (2)

Fuel pump

Lower fuel tank

Elbow

Fuel pump discharge check valve

Fuel tank pump hose

Nipple (2)

Personnel heater hose

Screw (1 O)

LockWasher (1 O)*

Screw (4)

LockWasher (4)*

WARNING

INITIAL SETUP