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TM 55-1905-220-14-10
5-9. FUEL INJECTOR-MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL-LAPPING
4. Injector
Lap the sealing surfaces indicated in
the figure in step 3 k and the chart
as follows:
WARNING
Use eye protection when using compressed air.
a. Clean the lapping blocks J22090
with compressed air. Do not use a
cloth or any other material for
this purpose.
b. Spread a good quality 600 grit dry
lapping powder on one of the lapping
blocks.
c. Place the part to be lapped flat on
the block as shown below and, using
a figure eight motion, move it back
and forth across the block. Do not
press on the part, but use just
enough pressure to keep the part
flat on the block. It is important
that the part be kept flat on the
block at all times.
5-276


 


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