Figure 4-71. Helm unit removal

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Figure 4-66. Rudder stops installation, hull numbers 8540 thru 8560 and 8580 thru 8818.

TM-55-1905-217-12 Landing Craft Mechanized; Steel; DED; Overait Length 74 Feet Mod 1 Marl VIII Navy Design LCM-8 Hull Numbers 8500 and 8580 thru 8618 Manual

Figure 4-73. Power take-off assembly, sectional view.

TM 55-1905-217-12

Figure 4-71. Helm unit removal

SECTION XVIII. POWER TAKE-OFF

ing the clutch drive shaft to prevent the clutch from

4-83. General

turning, turn the clutch adjusting ring counterclockwise

The outboard engine of each propulsion unit is equipped

and tighten the clutch until the desired pressure on the

with a front-mounted power take-off (fig. 4-72) to drive the

outer end of the hand lever, or at the clutch release shaft

hydraulic pumps for the ramp hoist system. Each power

is obtained. Then, reinstall the clutch adjusting ring

take-off includes a lever operated clutch. A front end

spring lock, making sure the ends of the lock are in the

power takeoff adapter supports the power take-off

notches in the adjusting ring.

assembly and surrounds the clutch and drive

mechanism. The adapter retains the crankshaft oil seal

e. When the clutch is properly adjusting, the

and is bolted to the engine front end plate and cylinder

approximate pressure required at the outer end of the

block.

hand lever to engage the clutch is 55 lbs.

4-84. Clutch Adjustment

When the clutch is properly adjusted, heavy pressure is

required at the outer end of the hand lever to move the

throw out linkage to the "over-center" or locked position.

Adjust clutch as follows:

a Disengage the clutch.

b Remove the inspection hole cover to expose the

clutch adjusting ring.

c Rotate the clutch, if necessary, to bring the

clutch adjusting ring lock within reach. See figure 4-73.

d Remove the clutch adjusting ring spring lock

screw and lock from the inner clutch pressure plate and

adjusting ring. Then, while hold

Figure 4-72. Power take-off.

4-72