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 - Page 331 of 1469
MAIN PRESSURE AND GOVERNOR PRESSURE TEST - Continued
17.
Remove pipe plug (Figure 7, Item 5) from auxiliary governor pressure port (Figure 7, Item 4) and install in main
pressure port (Figure 7, Item 6).
18.
Install pressure gauge (Figure 7, Item 2) and hose (Figure 7, Item 3) in auxiliary governor pressure port
(Figure 7, Item 4).
19.
Start engine and check pressure port connection for leaks.
20.
Check transmission oil level.
21.
Place transmission shift lever in 1-5 (drive) position and operate engine at 1,650 rpm. Note reading on
pressure
gauge.
22.
If pressure is not 82 to 91 psi (565 to 627 kPa), repair transmission (Figure 7, Item 1) as necessary.
23.
Stop engine and disconnect pressure gauge (Figure 7, Item 2) and hose (Figure 7, Item 3) from auxiliary
governor pressure port (Figure 7, Item 4).
24.
Remove pipe plug (Figure 7, Item 5) from main pressure port (Figure 7, Item 6).
M10193DAA
3
4
5
6
1
2
Figure 7.
Main Pressure and Governor Pressure Test.
TM 9-2320-272-23-3
0374
0374-12
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