TM 9-2320-272-24-4
5-48. FOURTH CLUTCH MAINTENANCE (Contd)
NOTE
Ensure new seal ring lips face toward oil pressure side of piston.
1.
Apply oil-soluble grease to new piston outer seal ring (11) and install new piston outer seal ring (12)
on piston (10).
2.
Apply oil-soluble grease to new piston inner seal ring (12) and install new piston inner seal ring (12)
in fourth clutch housing (5).
3.
Install piston (10) in fourth clutch housing (5).
NOTE
Steps 4 through 9 obtain clutch running clearance.
4.
Starting with clutch plate (9), alternately install five clutch plates (9) and five clutch discs (8) in
fourth clutch housing (5).
5.
Position backplate (7) in fourth clutch housing (5) and install with snapring (6).
6.
Measure clearance between backplate (7) and clutch disc (8). Clearance should be 0.68-0.127 in.
(17.27-3.226 mm).
7.
If clearance exceeds 0.127 in. (3.226 mm), replace clutch discs (8) and clutch plates (9) with new,
thicker clutch discs (8) and plates (9).
8.
If clearance still exceeds 0.127 in. (3.226 mm) after completing step 7, replace piston (10) with new,
thicker piston (10).
9.
If clearance is less than 0.68 in. (17.27 mm), replace piston (10) with new, thinner piston (10).
10.
Remove snapring (6), backplate (7), five clutch discs (8), and five clutch plates (9) from fourth clutch
housing (5).
NOTE
Soak five clutch discs in clean OE/HDO-10 lubricating oil for at least
two minutes before installing in fourth clutch housing.
11.
Starting with clutch plate (9), alternately install five clutch plates (9) and clutch discs (8) in fourth
clutch housing (5).
12.
Place optional spacer (4), piston return spring (3), and spring retainer (2) in fourth clutch housing (5).
13.
Position piston return spring compressor on spring retainer (2) and arbor press, and compress piston
return spring (3).
14.
Install spring retainer (2) in fourth clutch housing (5) with snapring (1).
15.
Remove piston return spring compressor from spring retainer (2).
NOTE
Perform step 1 for transmission with single-piece bearing
assembly.
1.
Placing race section of bearing assembly (14) into transmission housing (15) first, install bearing
assembly (14) in transmission housing (15).
NOTE
Perform step 2 for transmission with two-piece bearing.
Use oil-soluble grease to hold bearing race in place.
2.
Install bearing race (13) and bearing assembly (14) on fourth clutch housing (5). Ensure bearing
race (13) is installed outer lip first.
3.
Install fourth clutch housing (5) in transmission housing (15).
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