TM 9-2330-246-14
4-126. HEATER FUEL TANK REPLACEMENT (M373A2D AND M373A5) (Con't).
Loosen two clamps (1) securing filler neck hose (2) and move hose assembly until filler neck hose disengages
5.
from elbow (3). Replace filler neck hose if defective.
Support fuel tank (25). Remove four screws (19) and flatwashers (18) securing mounting supports (17) to
6.
chassis and remove mounting supports.
7.
Lower fuel tank (25) far enough to gain access to tube and wire connections at top of tank.
Remove five screws (6) and lockwashers (7). Remove transmitter (8) and gasket (9) from fuel tank (25). Discard
8.
Iockwashers and gasket.
Remove four screws (10) and Iockwashers (11). Remove flange and tube (12) and gasket (13) from fuel tank
9.
(25). Discard Iockwashers and gasket.
Remove four screws (31) and Iockwashers (30). Remove flange (28) and gasket (29) from fuel tank (25). Discard
10.
Iockwashers and gasket.
Remove three screws (4) and Iockwashers (5). Remove elbow (3) and gasket (32) from fuel tank (25). Discard
11.
Iockwashers and gasket.
12.
Lower fuel tank (25) and remove from under semitrailer.
INSTALLATION
b.
Position fuel tank (25) for installation.
1.
Install elbow (3) and new gasket (32) on fuel tank (25) using three screws (4) and new Iockwashers (5).
2.
Install flange (28) and new gasket (29) on fuel tank (25) using four screws (31) and new Iockwashers (30).
3.
Install flange and tube (12) and new gasket (13) on fuel tank (25) using four screws (10) and new Iockwashers
4.
(11).
Install transmitter (8) and new gasket (9) on fuel tank (25) using five screws (6) and new Iockwashers (7).
5.
Raise fuel tank (25) into mounting position. Install two mounting supports (17) using four screws (19) and
6.
flatwashers (18) to secure fuel tank to chassis.
Install filler neck hose (2) over elbow (3) and tighten two clamps (l).
7.
On early M373A2D semitrailers, install screws and flatwashers to secure center tank support to chassis.
8.
Install tank guard (20) on mounting supports (17) using six screws (1 6), new lockwashers(15), and flatwashers
9.
(14).
Install each bracket (22) on tank guard (20) using eyebolt (21), new Iockwasher (23), and wingnut (24).
10.
Install drain plug (26) and new gasket (27) in fuel tank (25).
11.
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