TM-9-2320-272-23-3

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

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 3 OF 5

SEPTEMBER 2012
TM-9-2320-272-23-3

  TM-9-2320-272-23-3 - Page 895 of 1469

REMOVAL
WARNING
Do not disconnect air lines or hoses before draining air reservoirs. Small parts under pressure
may shoot out with high velocity. Failure to comply may result in injury or death to personnel.
CAUTION
When disconnecting air lines and hoses, plug all openings to prevent dirt from entering and
causing damage to internal parts. Remove all plugs prior to installation.
NOTE
•
Tag lines and fittings for installation.
•
Mark fitting direction for installation.
1.
Unlock and open harness support clip (Figure 1, Item 10) on ECU mounting bracket (Figure 1, Item 1).
2.
Unlock spring clip (Figure 1, Item 5) and move to side, press down on two locking tabs (Figure 1, Item 4) and
remove ABS wiring harness connector (Figure 1, Item 7) from ECU connector (Figure 1, Item 6).
3.
Loosen nut (Figure 1, Item 17) and disconnect blue channel connector (Figure 1, Item 18) from forward ABS
relay valve (Figure 1, Item 31).
4.
Loosen nut (Figure 1, Item 20) and remove air line (Figure 1, Item 19) from elbow (Figure 1, Item 21) on control
port (Figure 1, Item 26).
5.
Loosen nut (Figure 1, Item 23) and remove air line (Figure 1, Item 24) from elbow (Figure 1, Item 22) on supply
port (Figure 1, Item 25).
6.
Loosen nut (Figure 1, Item 14) and remove air line (Figure 1, Item 15) from elbow (Figure 1, Item 13) on delivery
port (Figure 1, Item 16).
7.
Loosen nut (Figure 1, Item 28) and remove air line (Figure 1, Item 29) from adapter (Figure 1, Item 27) on
delivery port (Figure 1, Item 30).
8.
Remove two locknuts (Figure 1, Item 34), washers (Figure 1, Item 33), and forward ABS relay valve
(Figure
1,
Item
31) from bracket (Figure 1, Item 32). Discard locknuts.
9.
Remove adapter (Figure 1, Item 27) from delivery port (Figure 1, Item 30) on forward ABS relay valve
(Figure
1,
Item
31).
10.
Remove elbow (Figure 1, Item 13) from delivery port (Figure 1, Item 16) on forward ABS relay valve
(Figure
1,
Item
31).
11.
Remove elbow (Figure 1, Item 22) from supply port (Figure 1, Item 25) on forward ABS relay valve
(Figure
1,
Item
31).
12.
Remove elbow (Figure 1, Item 21) from control port (Figure 1, Item 26) on forward ABS relay valve
(Figure
1,
Item
31).
13.
Remove three screws (Figure 1, Item 3) and ECU (Figure 1, Item 2) from ECU mounting bracket
(Figure
1,
Item
1) on forward ABS relay valve (Figure 1, Item 31).
TM 9-2320-272-23-3
0458
0458-2


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