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 TM 55-1905-217-34
valve is scored or pitted and cannot be cleaned up with crocus cloth, it must be replaced. If the dump valve bore in the
flywheel is scored or brinelled and cannot be cleaned up, replace the flywheel.
(9) If the reverse gear drive shaft thrust washers are worn or scored excessively, they must be replaced.
(10) If the reverse gear drive shaft oil seal rings are worn or scored excessively, they must be replaced.
(11) If the inside diameter of the oil transfer sleeve is worn or scored excessively, it must be replaced.
(12) Inspect the drive shaft pilot bearing for indication of corrosion and pitting. Lubricate the bearing with
light engine oil; then, while holding the bearing inner race from turning, revolve the outer race slowly by hand to check for
rough spots in the bearing. Rough spots in the bearing is sufficient cause for rejection.
(13) Inspect the planetary gear assembly. A maximum backlash of .015 inch is permitted between any two
gears within the planetary assembly. Replace assembly if backlash is excessive.
(14) Clean all oil passages in the flywheel, reverse gear housing and drive shaft with compressed air.
(15) When a major overhaul of the torquematic marine gear is being performed, all of the flexible oil tubes
attached to the maring gear oil pump, oil filter, oil strainer, control valve and oil cooler must be removed, cleaned and
blown out with compressed air. Also, remove and clean the marine gear oil cooler element.
e. Reassembly.
(1) Flywheel and forward clutch.
(a) If removed, install the oil passage plugs (16, fig. 3-92) in the flywheel. Proper position of
the plugs is flush with or slightly below the outer surface of the flywheel.
(b) Support the flywheel on wood blocks with the forward (ring gear) side up.
(c) Install the pilot bearing oil seal retaining ring (19) in the ring groove in the flywheel with a
pair of small-nose pliers.
(d) Install the pilot bearing oil seal (20) in the flywheel as follows:
1. Apply a thin coat of sealing compound to the outside diameter of the oil seal casing.
2. Place the oil seal on the pilot oil seal replacer J 4700 with the lip of the seal facing
the flange of the tool.
NOTE
The lip of the oil seal must face the crankshaft side of the flywheel.
3. Start the oil seal straight into the bore of the flywheel, and tap it down against the oil
seal retaining ring.
CAUTION
When installing the oil seal, use care not to drive too hard against oil seal retaining
ring or damage to the thin flange of the retaining ring groove may occur.
(e) Install the emergency engagement bolts (24) with a jam nut on each bolt, in the tapped
holes in the forward face of the flywheel. Tighten the bolts securely against the jam nuts.
NOTE
The jam nuts serve as spacers to prevent the emergency engagement bolts from contacting
the forward piston during normal operation.
(f) If removed, install the forward clutch piston drive pins (9) in the flywheel as follows:
1. Support the flywheel on wood blocks with the forward (ring gear) side down.
2. Note the scribe marks placed on the flywheel at the time the old pins were removed.
Start a drive pin in each of the drive pin holes in the rear face of the flywheel, with the square
head of the drive pin in line with the scribe mark.
3. With a soft (lead) hammer, drive the pins straight into the flywheel until the head of
the pins contact the surface of the flywheel.
NOTE
The sides of the pins must aline with the scribe marks. If a pin has twisted slightly out of
line when installing, line it up with a wrench.
4. Place the forward clutch piston (8) -without seal ring-down over the drive pins to
assure the heads of the pins will engage the slots in the piston without binding. Then, remove
the piston from the flywheel.
(g) Lubricate the pilot bearing (21) with clean engine oil. Start the bearing straight into the bore
of the flywheel with the shielded side of the bearing facing the oil seal. Tap the bearing down in the
flywheel with a clean wood block and hammer.
(h) Place the seal ring expander (7) in the seal ring groove of the flywheel; then, starting at the
approximate center of the expander, feed the thick lip of the seal ring into the groove next to the expander
with the narrow lip of the seal ring pointed down into the flywheel.
(i) Lubricate the outside of the forward clutch dump valve (13) with engine oil. Place the dump
valve spring inside the dump valve. Insert the spring and valve into the valve opening in the flywheel and
install the retaining plug. Tighten the plug until it is flush with the periphery of the flywheel. Then, stake
the plug at two places with a center punch.
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