Inspection and Repair - TM-55-1905-217-340056

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Figure 3-23. Reaming seat of injector tube in cylinder head

TM-55-1905-217-34 Landing Craft Mechanized; Steel; DED; Overait Length 74 Feet Mod 1 Marl VIII Navy Design LCM-8 Manual

Reassembly

TM 55-1905-217-34

remove the steel locking ball. Then, invert the shaft and gear assembly in the press, and press the shaft from

the gear. Do not misplace the steel ball. Do not press the squared end of the shaft through the gear as slight

marks will damage the oil seal contact surface.

(4) Remove the driven shaft and gear as an assembly from the pump body. Do not remove the gear

from the shaft. The driven gear and shaft are serviced as an assembly only.

(5) Remove the relief valve plug.

(6) Remove the valve spring, pin and relief valve from the valve cavity in the pump body.

(7) To replace the oil seals, remove with tool as shown in figure 3-24 by clamping the pump body in a

bench vise and screwing the threaded end of the tool shaft into the outer oil seal (seal nearest to bolting

flange). Then tap the pilot end of the shaft with a hammer to remove the seal. Repeat this operation to remove

the inner oil seal.

NOTE

Observe the position of the inner oil seal lip before removing the seal to permit

installation of a new seal in the same position.

c. Inspection and Repair.

(1) Clean all of the parts in clean fuel oil, and dry them with compressed air.

(2) Oil seals, once removed from the pump body, must be discarded and replaced with new seals. The

lips of the oil seals must fit snug around the pump shaft and must be free of nicks or cracks.

(3) Check the pump gear teeth for scoring, chipping or wear. Check the ball slot in the drive gear for

wear. If necessary, replace with a new gear.

(4) Inspect the drive and driven shafts for scoring or wear. Replace with new shafts if necessary. The

driven shaft is serviced as a gear and shaft assembly only.

(5) The mating faces of the pump body and cover must be flat and smooth and fit tightly together. Any

scratches or slight damage may result in pressure leaks. Also check for wear at areas contacted by gears and

shafts. Replace the cover or body if necessary.

(6) The relief valve must be free from score marks and burrs and fit its seat in the pump body. If the

relief valve is scored and cannot be cleaned up with fine emery cloth or crocus cloth, the valve must be

replaced.

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