TM 9-2320-272-24-4
5-47. FORWARD CLUTCH MAINTENANCE (Contd)
NOTE
If new centrifugal valve is being installed, all components must
have same color code as old valve.
Install centrifugal valve (3) and valve spring (2) in forward clutch housing (16). Ensure pointed end
1.
of centrifugal valve (3) is installed first.
Push valve plug (1) into forward clutch housing (16) and install with retainer pin (17). Retainer pin (17)
2.
must protrude 0.080-0.100 in. (2.03-2.54 mm) above front surface of forward clutch housing (16).
Apply oil-soluble grease to new piston outer seal ring (12) and install new piston outer seal ring (12)
3.
on piston (10). Ensure piston outer seal ring (12) lips face toward oil pressure side of piston (10).
Apply oil-soluble grease to new piston inner seal ring (15) and install new piston inner seal ring (15)
4.
on forward clutch housing (16) hub. Ensure piston inner seal ring (15) lips face toward oil pressure
side of piston (10).
Install piston (10) in forward clutch housing (16).
5.
NOTE
Steps 6 through 12 obtain clutch running clearance.
Starting with clutch plate (5), alternately install six clutch plates (5) and six clutch discs (4) in
6.
forward clutch housing (16).
Position fourth clutch drive hub (6) in forward clutch housing (16) and install with snapring (7).
7.
Measure clearance between fourth clutch drive hub (6) and clutch disc (4) with forward clutch
8.
clearance gauge.
Clutch running clearance should be 0.094-0.148 in. (2.387-3.759 mm).
9.
NOTE
Perform steps 10 through 12 only if clutch running clearance is
incorrect.
If clearance exceeds 0.148 in. (3.759 mm), replace clutch plates (5) and clutch discs (4) with new,
10.
thicker clutch plates (5) and clutch discs (4).
If clearance still exceeds 0.148 in. (3.759 mm) after completing step 10, replace piston (10) with new,
11.
thicker piston (10).
If clearance is less than 0.094 in. (2.387 mm), replace piston (10) with a new, thinner piston (10).
12.
Remove snapring (7), fourth clutch drive hub (6), six clutch discs (4), and six clutch plates (5) from
13.
forward clutch housing (16).
Place piston return spring (14) and spring retainer (13) in forward clutch housing (16).
14.
Place compressor tool on spring retainer (13) and arbor press.
15.
Compress piston return spring (14) with compressor tool and arbor press and install spring
16.
retainer (13) with snapring (11).
Remove compressor tool from spring retainer (13).
17.
NOTE
Use oil-soluble grease to hold bearing race and bearing in place.
Soak six clutch discs in clean OE/HDO-10 lubricating
transmission oil for at least two minutes before installing in
forward clutch housing.
Perform step 18 for transmissions with single-piece bearing
assembly.
Install bearing assembly (9) in forward clutch housing (16). Ensure lube scallops of bearing
18.
assembly (9) face down.
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