TM 9-2330-238-14
4-72. EXHAUST SYSTEM REPLACEMENT (Con’t).
d.
INSTALLATION (M447, M447C, AND M750)
1.
Install exhaust tube (11) in heater.
2.
Position four new preformed packings (17) on spacer (16) and install in bonnet on exhaust tube (11).
3.
Position two plates (15) on bonnet and secure with eight screws (12), new Iockwashers (14), and washers (13).
4.
Position two clamps (22) on exhaust pipe (18).
5.
Install exhaust pipe (18) through plates (15) and aline holes in clamps (22) with holes in bonnet and secure with
eight screws (20) and new Iockwashers (19).
6.
Secure clamps (22) to exhaust pipe (18) with two screws (23) and new self-locking nuts (21).
7.
Close side bonnet doors.
1.
Remove four screws (31) from bracket (25) and bonnet,
2.
Rotate stack assembly (24) counterclockwise and remove stack assembly from mounting ring (30).
3.
Remove screw (32), lockwasher (26), nut (27), and bracket (25) from stack assembly (24). Discard lockwasher.
4.
Remove four screws (28) and mounting ring (30) from nipple (29) and bonnet.
5.
Remove nipple (29) from heater.
f .
INSTALLATION (M749 SOUTHWEST MODEL VRP)
1.
Install nipple (29) in heater.
2.
Position mounting ring (30) on nipple (29) and Install four screws (28).
TA702050
4-178
