TM 5-1940-322-24
0166 00
TRANSMISSION REPAIR (Contd)
CLUTCH PACK ASSEMBLY (Contd)
CAUTION
Take care when installing clutch assemblies not to damage front
piston rings as they enter the rear housing bores. Failure to comply
may result in damage to equipment.
14.
Install forward and rear clutch assemblies (10) and (4) in rear housing (6), ensuring that forward and
reverse pinions (9) and (5) are correctly meshed with output gear (8).
NOTE
Apply a light coat of soluble grease around the outside of bearing
races at installation to prevent races from falling out of front
housing during installation.
Do not install adjusting shims under bearing races at this time.
15.
Install forward clutch, reverse clutch, and output shaft tapered-roller bearing outer races (14), (12),
and (13) in their respective bores in front housing (2).
16.
Install gasket (3) and front housing (2) on rear housing (6) with eleven screws (1). Tighten screws (1)
to 33 lb-ft (45 Nm).
17.
Measure end play of output shaft tapered-roller bearings as follows:
a. Position transmission so it rests on front housing (2).
b. Install dial indicator on rear housing (6) and position finger of dial indicator on face of output
flange (15).
c. Rotate output shaft two to three complete turns while pushing downward to seat front bearing.
Set dial indicator to zero position on gauge.
d. Using two levers, lift output shaft flange (15) to take up play in bearing. Total amount of play
will be shown on dial indicator gauge. Record amount of play registered on gauge.
18.
Measure end play on forward and reverse clutch shafts as follows:
a. Rotate output shaft (16) two to three complete turns while pushing downward to seat front
bearing.
b. Install dial indicator on rear housing (6) and position finger of dial indicator on rear end of
clutch shaft (16). Set dial indicator to zero position on gauge.
c. Using two levers, lift clutch shaft (16) to take up all play in bearing. Total amount of play will be
shown on dial indicator gauge. Record amount of play registered on gauge.
d. Repeat step 18 for second clutch shaft (17).
19.
Set final clearance of tapered-roller bearings as follows:
a. Remove eleven screws (1), front housing (2), and gasket (3) from rear housing (6).
b. Prepare pack of adjusting shims (11) for each bearing. Shim packs should be selected to correct
end play values recorded in steps 17 and 18.
c. Correct end play values for each shaft are:
Forward and reverse clutch shafts (16) and (17): 0.0010.003 in. (0.0250.076 mm).
Output shaft: (7) 0.0010.004 in. (0.0250.1020 mm).
Example:
If end play of 0.52 in. (1.321 mm) was recorded for output shaft (7), required shim pack thickness
should be: 0.520.002 in. (1.3210.051 mm). Nominal end play = 0.050 in. (1.270 mm).
e. Remove bearing outer races (12), (13), and (14) from front housing (2). Install shim packs in their
respective housing (2) bores. Coat outside of bearings with soluble grease to hold
bearings (12), (13), and (14) in housing (2) on top of shim packs.
f. Install gasket (3) and front housing (2) on rear housing (6) with eleven screws (1). Tighten
screws (1) to 33 lb-ft (45 Nm).
20.
Recheck end play on all three shafts to ensure it is within limits. If necessary, repeat
steps 17 through 19.
0166 00-18
