Quantcast Cylinder liner upper counterbore enlarging.

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TM 9-2815-226-34-1
(u) Rotate adjusting nut until feeler gage is just held between nut and drive unit.)
(v) Tighten adjusting nut locking screw. Remove gage.
(w) Apply oil to tool bit.
(x) Rotate handle clockwise while applying pressure to cutter plate.
(y) Stop rotating handle when adjusting nut bottoms out against top of drive unit (handle turns freely).
(z) Lift up on handle and engage lockpin.
WARNING
COMPRESSED AIR USED FOR CLEANING PURPOSES WILL NOT EXCEED 30 PSI
(207 KPA).  USE ONLY WITH EFFECTIVE CHIP GUARDING AND PERSONAL
PROTECTIVE EQUIPMENT (GOGGLES, SHIELD, GLOVES, ETC.).
(aa) Direct shop air onto counterbore ledge to remove metal shavings.
(ab) Remeasure counterbore depth as previously described. If depth ex ceeds 0.412 in.
(10.46 mm),
ledge must be enlarged to accept replacement sleeve (para 3-9c).
(ac) Remove counterbore tool.
(ad) Deburr bore with emery cloth.
(ae) Wipe counterbore clean.
c. Cylinder liner upper counterbore enlarging.
NOTE
Enlarging of an upper counterbore is required to repair a cylinder block if any one
of the following conditions exists:  its upper liner counterbore ledge area is
damaged; its upper liner counterbore ledge has been resurfaced beyond maximum
depth; or its upper liner counterbore ledge diameter has been exceeded.
Counterbore is enlarged to accept a replacement sleeve which forms a new
watertight seal.
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