TM-9-2320-272-23-4

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

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 4 OF 5

SEPTEMBER 2012
TM-9-2320-272-23-4

  TM-9-2320-272-23-4 - Page 1119 of 1393

ASSEMBLY - Continued
NOTE
Steps (15) through (17) check transfer PTO shaft end play.
15.
Force transfer PTO shaft (Figure 16, Item 6) to rear of transfer case PTO (Figure 16, Item 2).
16.
Set dial indicator to zero.
17.
Force transfer PTO shaft (Figure 16, Item 6) to front of transfer case PTO (Figure 16, Item 2) and record reading
shown on dial indicator. End play should be 0.001 to 0.005 in. (0.0254 to 0.127 mm).
18.
Remove four screws (Figure 16, Item 3), washers (Figure 16, Item 4), and bearing cap (Figure 16, Item 5) from
transfer case PTO (Figure 16, Item 2).
CAUTION
Do not apply sealer to mating surfaces.
NOTE
Use reading obtained in Step (17) plus a 0.003 in. (0.0762 mm) shim for starting shim
pack
thickness.
19.
Install starting shim pack (Figure 16, Item 1) and bearing cap (Figure 16, Item 5) on transfer case PTO
(Figure
16,
Item
2) with four washers (Figure 16, Item 4) and screws (Figure 16, Item 3). Tighten screws
18 to 24 lb-ft (24 to 32 N·m).
20.
Position dial indicator plunger against PTO shaft (Figure 16, Item 6).
NOTE
Steps (21) through (23) check transfer PTO shaft end play.
21.
Force transfer PTO shaft (Figure 16, Item 6) to rear of transfer case PTO (Figure 16, Item 2).
22.
Set dial indicator to zero and force transfer PTO shaft (Figure 16, Item 6) to front of transfer case PTO
(Figure
16,
item
2).
23.
Record reading shown on dial indicator. End play should be 0.001 to 0.005 in. (0.0254 to 0.127 mm).
24.
Remove four screws (Figure 16, Item 3), washers (Figure 16, Item 4), and bearing cap
(Figure 16, Item 5) from transfer case PTO (Figure 16, Item 2).
NOTE
Use reading obtained in Step (23) for number or thickness of shims to be removed or added
for transfer case PTO shaft adjustment.
25.
Remove or add shims (Figure 16, Item 1) as necessary.
26.
Remove shim pack (Figure 16, Item 1).
NOTE
Do not apply sealer to shims.
27.
Apply a light coat of sealer to mating surfaces or transfer case PTO (Figure 16, Item 2) and bearing cap
(Figure
16,
Item
5).
28.
Install shim pack (Figure 16, Item 1) and bearing cap (Figure 16, Item 5) on transfer case PTO
(Figure 16, Item 2) with four washers (Figure 16, Item 4) and screws (Figure 16, Item 3). Tighten screws
18 to 24 lb-ft (24 to 32 N·m).
TM 9-2320-272-23-4
0725
0725-16


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