TM-9-2320-272-23-5
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 5 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-5 - Page 389 of 623
REMOVAL
1.
Disconnect tachometer drive shaft (Figure 1, Item 4) from tachometer pulse sender unit (Figure 1, Item 11).
2.
Remove screw (Figure 1, Item 12), washer (Figure 1, Item 1), and loop clamp (Figure 1, Item 2) from intake
manifold (Figure 1, Item 10).
3.
Remove rubber grommet (Figure 1, Item 3) from firewall (Figure 1, Item 5). Discard grommet.
4.
Remove eight screws (Figure 1, Item 8) from instrument cluster (Figure 1, Item 7).
5.
Pull instrument cluster (Figure 1, Item 7) away from instrument panel (Figure 1, Item 9).
6.
Disconnect tachometer driveshaft (Figure 1, Item 4) from tachometer (Figure 1, Item 6) on instrument cluster
(Figure 1, Item 7).
7.
Remove tachometer driveshaft (Figure 1, Item 4) from engine side of firewall (Figure 1, Item 5). Replace if bent
or cracked.
1
M0201DAA
2
3
4
5
12
4
11
10
9
8
7
6
Figure 1.
Tachometer Removal.
END OF TASK
TM 9-2320-272-23-5
0817
0817-2
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