Figure 4-18. Removing the governor.

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Figure 4-17. Fuel pump.

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 4-19. Removing the governor, hull number 8540 thru 8560 and 8580 thru 8618.

idle-range rpm, and drive ratio. The maximum engine

(4) If, after making the preceding checks, the

speed, not shown on the identification plate, is stamped

governor fails to control the engine properly, the governor

on the option plate attached to the valve rocker cover.

should be removed and reconditioned.

b. Checking Governor Operation.

Removing the Governor (fig. 4-18, 4-19, and 4-20).

(1) Governor difficulties are -usually indicated

by speed variations of the engine; however, it does not

(1) Disconnect the linkage attached to the

necessarily mean that all such speed fluctuations are

governor control levers.

caused by the governor. Therefore, when improper

(2) Remove the breather tube.

speed variations appear, the engine should be checked.

(3) Remove four screws and lockwashers and

(2) Check the engine to be sure all cylinders

lift the governor cover and gasket from the governor

are firing. If any cylinder is not firing, replace the injector

housing.

(para 4-28).

(4) Refer to figure 4-20 and disconnect the fuel

(3) Check for bind that may exist in the

rod from the differential lever.

governor operating mechanism or in the linkage between

(5) Remove the four bolts and the separate

the governor and the control tube. With the fuel rod

cover from the weight housing.

connected to the injector control tube lever, the

'(6) Remove two governor-to-cylinder head

mechanism should be free from bind throughout the

bolts.

entire travel of the injector racks. If friction exists in the

(7) Move the upper end of the control housing

mechanism, it may be located and corrected as follows:

away from the cylinder head and free the lower end from

(a) If an injector rack sticks or moves too hard, it

the weight housing.

may he due to the injector hold-down clamp being too

(8) Use tool J4242, to remove the six governor

tight or improperly positioned. To correct this condition,

weight housing-to-blower bolts; then withdraw the

loosen the injector clamp, reposition, and tighten to 20-

housing from the blower.

d Installing the Governor.

25 ft-lb torque.

(b) A binding injector may result from internal dirt

(1) Affix anew gasket to the governor weight

accumulation, defective plunger and bushing, or a bent

housing. Start the splined end of the weight shaft in the

injector rack. A defective injector must be replaced.

upper blower rotor and position the housing against the

blower end plate.

improperly positioned rack control lever. Loosen the

control rack adjusting screws.

If this relieves the bind, relocate the lever on the control

tube and position the rack as outlined in paragraph 4-1.

(d) The injector control tube may bind in its support

brackets, thus preventing -free movement of the injector

racks to their no-fuel position due to tension of the return

spring. This condition may be corrected by loosening and

realining the control tube supporting brackets. If the

control tube support brackets were loosened, realined

and tightened, the injector racks must be repositioned as

outlined in paragraph 4-31.

(e) A bent injector control tube return spring may

cause friction in the operation of the injector control tube.

If the spring has been bent or otherwise distorted, install

a new spring. Check for bind at the pin which connects

the fuel rod to the injector control tube lever; replace the

pin if necessary.

Figure 4-18. Removing the governor.

4-23