Figure 4-27. Throttle control adjustment dfagram-cont.

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Figure 4-27. Throttle control adjustment dfagram-cont.

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 4-28. Pilot house engine control, hull number 8540 thru 8560 and 8580 thru 8618.

TM 55-1905-217-12

NOTE

age, the pins in the throttle control levers (15) at the

Engine may be brought up to operating temperature by

governor covers of both engines should be within 1/16-

declutching engines and setting throttle to approximately

inch of the same distance from the end of the slot in cam.

1,200 engine rpm. If quick warmup is attempted by

If the levers are not within this limit, the governor gaps or

turning the propeller, ,the ship must be securely tied to

the injector rack adjustments are not identical on the two

the dock with no loose lines or floating obstruction to foul

engines and should be rechecked (para 4-81).

the propeller.

(12) Disengage one engine throttle control (8)

If adjustments are necessary, repeat steps (14) and (15)

from cross shaft (5) by pulling upward on the lever. Set

above after making adjustments.

idle speed of engine to 550 rpm (para 4-31).

b. Reverse Gear Control (fig. 4-28). A single control

(13) Repeat step (12) for other engine.

(14) Set governor no-load top speed.

lever is provided in the pilot house and in the engine

(a) With both engines warmed up, stop engines and

room for reverse gear control of each propulsion unit.

disconnect throttle control rod (4) for outboard engine by

The reverse gear control is interlocked with the throttle

removing bolt (1).

control to prevent engagement or disengagement of the

(b) Start inboard engine, declutch and move pilot

clutch except when propulsion unit is at idle rpm. Control

house throttle control to FULL OPEN position.

of individual engine reverse gears is provided by a

shutoff valve (18) for controlling the flow of oil to each

indicated by tachometer.

engine. The valves are normally in a vertical (ON)

(d) Stop engine and connect throttle control tube for

position. The reverse gear control linkage is adjusted as

outboard engine 'and disconnect inboard engine by

follows (-engine stopped):

removing bolt (13).

(e) Start outboard engine, declutch, and with pilot

CAUTION

house throttle control in FULLOPEN position, note and

If a shutoff valve is placed in an off position,

record speed.

lock it in that position to prevent vibration

(f) If no-load speeds of the two engines are not the

from moving it to a vertical (ON) position.

same, increase the low engine by loosening the lock nut

(11, fig. 4-20) and turning the high speed spring retainer

(1) Disengage pilot house control lever (14 and

(10) in until the engine is operating at the desired no-load

17, fig. 2-3) by pulling out manual disconnect pin (22) and

speed.

turning 90 degrees.

(g) (connect throttle control rod (12) for inboard

engine.

(2) Place engine room control lever (24) into

(15) Synchronize engine speeds at no-load.

forward position. Using turnbuckle, adjust rod (23) to

Speeds of the two engines within one propulsion unit

insure lever (20) is contacting forward stop.

must be synchronized to obtain, as nearly as possible,

the same no-load speeds in the range just below the

(3) Place engine room control lever (24) into

rated load speed by adjusting the linkage to each

reverse position. Insure lever (20) is just contacting

governor. Synchronize as follows:

reverse stop. Adjust turnbuckle and 'rod (23) if required.

(a) With engines warmed up declutch both engines

and move the pilot house throttle control to such position

(4) Place engine room control lever (24) into

that speed of the inboard engine is 1,750 rpm as

neutral position. Insure lever (20) is in neutral position.

indicated by the tachometer. lock the throttle in this

position.

(5) Repeat steps (2), (3), and (4) until lever (20)

(b) Note speed of the outboard engine.

is in correct position in relation to control lever (24).

If the speeds of the two engines are not the same, loosen

the ,locknuts at turnbuckle on the outboard engine, and

(6) Engage pilot house control lever by pulling

by adjusting turnbuckle, shorten throttle rod to decrease

out manual disconnect -pin (22) and turning 90 degrees.

or lengthen to increase engine speed.

(7) Place pilot house control in forward position

FULL-OPEN position. In the full open position, without

and adjust turnbuckles (25) to obtain proper position of

strain on the throttle link

engine room control (21).

(8)

Repeat step (7) for reverse and neutral

positions.

4-32