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TM 5-4210-220-12
4-21. EXHAUST SYSTEM.
4-21.1 Muffler and Tail Pipe.
This task covers
a.
Removal
b.
Inspection
c.
Installation
TOOLS
MATERIALS/PARTS
Tool Kit, General Mechanic,
86147 Muffler
NSN 5180-00-177-7033
891564 Tall Pipe
EQUIPMENT CONDITION
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
Pump Body, and Hose Body Heat Shields Removed
(see para. 4-11)
WARNING
Exhaust parts can be hot enough to cause severe burns. Allow exhaust system to cool before
servicing.
The muffler is heavy. To prevent personal injury, use a floor jack to support muffler during removal
or installation.
REMOVAL
(1)
Remove remote handles from foam tank drain valve and turret pipe drain valve. Pull them clear of the
underside of the truck.
(2)
Remove nuts and washers (1).
(3)
Loosen pipe clamp (2) on front of muffler. Do not remove clamp U-bolt.
(4)
While supporting the muffler, tap out the bolts (3). Twist muffler and tall pipe until it is free of exhaust
pipe. Lower to the floor.
(5)
When on the floor, remove both pipe clamps (2 and 6), and remove tall pipe (4) from muffler.
INSPECTION
(1)
Inspect all parts for corrosion. Excessive corrosion resulting in holes or flaking is cause for rejection.
(2)
Inspect rubber shocks (7). They should not be brittle or cracked. Replace as required.
(3)
Replace any part failing inspection.
4-334
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