TM-9-2320-272-23-2

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 2 OF 5

SEPTEMBER 2012
TM-9-2320-272-23-2

  TM-9-2320-272-23-2 - Page 639 of 1417

REMOVAL
CAUTION
Cover or plug all openings to prevent dirt from entering and damaging engine components.
1.
Loosen nut (Figure 1, Item 27) and disconnect air tube (Figure 1, Item 8) from air compressor
(Figure
1,
Item
28) and elbow (Figure 1, Item 26).
2.
Loosen nut (Figure 1, Item 14) and disconnect air tube (Figure 1, Item 8) from air governor (Figure 1, Item 13)
and adapter (Figure 1, Item 15).
3.
Remove screw (Figure 1, Item 11), washer (Figure 1, Item 10), two clamps (Figure 1, Item 9), and air tube
(Figure 1, Item 8) from engine access cover (Figure 1, Item 12).
4.
Remove screw (Figure 1, Item 23), wire clamp (Figure 1, Item 24), and wiring harness (Figure 1, Item 25) from
lower left side of air intake connector (Figure 1, Item 2) and intake manifold (Figure 1, Item 3).
NOTE
Wire clamp will remain on wiring harness.
5.
Disconnect hose (Figure 1, Item 20) from elbow (Figure 1, Item 21).
6.
Remove elbow (Figure 1, Item 21) and air cleaner indicator filter (Figure 1, Item 22) from intake manifold
(Figure
1, Item 3).
NOTE
Tag cable ground strap for installation.
7.
Remove screw (Figure 1, Item 18), washer (Figure 1, Item 17), lockwasher (Figure 1, Item 16), and cable
ground strap (Figure 1, Item 19) from intake manifold (Figure 1, Item 3). Discard lockwasher.
NOTE
•
Air intake manifold is mounted with screw-assembled washers on late model engines.
Screws, lockwashers, and washers from early model engines will be discarded and
replaced with screw-assembled washers.
•
Perform Step (8) only if clamps are on vehicle.
8.
Remove screw (Figure 1, Item 30), two clamps (Figure 1, Item 29), and fuel tubes (Figure 1, Item 31) from
intake manifold (Figure 1, Item 3).
9.
Remove eight screws (Figure 1, Item 4), lockwashers (Figure 1, Item 5), washers (Figure 1, Item 6), intake
manifold (Figure 1, Item 3), and three gaskets (Figure 1, Item 7) from cylinder heads (Figure 1, Item 1). Discard
lockwashers and gaskets. Discard screws, lockwashers, and washers from early model engines. Clean gasket
remains from intake manifold and cylinder head mating surfaces.
TM 9-2320-272-23-2
0234
0234-2


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