OVERHAUL-INSPECTION (cont) - TM-55-1905-220-14-100278

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OVERHAUL-INSPECTION

TM-55-1905-220-14-10 Landing Craft Utility LCU 1671-1679 NSN 1905-01-009-1056 Manual

OVERHAUL-INSPECTION (cont)

TM 55-1905-220-14-10

5-9. FUEL INJECTOR-MAINTENANCE INSTRUCTIONS (Continued).

LOCATION

ITEM

ACTION

REMARKS

OVERHAUL-INSPECTION (Cont)

g. Check the seal ring area on the

injector body for burrs or scratches.

Also check the surface which

contacts the injector bushing for

scratches, scuff marks or other

damage. If necessary, lap this

surface. A faulty sealing surface

at this point will result in high

fuel consumption and contamination

of the lubricating oil. Replace

any loose injector body plugs or a

loose dowel pin. Install the

proper number tag on a service

replacement injector body.

h. Inspect the injector plunger and

bushing for scoring, erosion,

chipping or wear. Check for sharp

edges on that portion of the

plunger which rides in the gear.

Remove any sharp edges with a 500

grit stone. Wash the plunger after

stoning it. Injector Bushing

Inspectalite can be used to check

the port holes in the inner diameter

of the bushing for cracks or chip-

ping. Slip the plunger into the

bushing and check for free movement.

Replace the plunger and bushing as

an assembly if any of the above

damage is noted, since they are

mated parts. Use new mated factory

parts to assure the best perfor-

mance from the injector.

Injector plungers cannot be reworked

to change the output. Grinding

will destroy the hardened case at

the helix and result in chipping

and seizure or scoring of the

plunger.

Examine the spray tip seating

surface of the injector nut and

spray tip for nicks, burrs, erosion

or brinelling. Reseat the surface

5-273