TM 9-4910-579-14&P
PROCEDURE
CYLINDER BLOCK PREPARATION
Remove all studs.
Clean carbon and oil from surface. File top of block to remove burrs.
Mike all cylinders for largest worn diameter.
SPECIAL ANCHOR BOLTS
Two special short anchor bolts are furnished with the machine and additional sizes are available. These can be
turned into the head bolt holes in the block. Turn bolt down on anchor gage to set height.
INSTALLING ANCHOR BOLT ASSEMBLY
Select proper length clamp and centering screws. See Page - 7 -
Build up anchor bolt to proper length, using combination of bushings and extension as necessary. See Page 10
CENTERING AND CLAMPING
Wipe base of machine clean.
Place machine in position over anchor bolt.
Remove anchor gage.
Select proper centering fingers, then PUT POINTED END of each into the boring head and push all the way in.
Lower sleeve to desired position for centering - using handwheel.
Tighten centering handwheel, at extreme top of bar, until all three fingers are tight against cylinder wall.
Clamp machine to cylinder block, using hex head screw on side of the base.
USE WRENCH FURNISHED - A LONGER WRENCH WILL CLAMP TOO TIGHTLY - See Page - 8 -
Loosen centering handwheel all the way and raise sleeve back to top position.
ROUGH BORE
Lap roughing R tool. See Page - 12 -
Set Micrometer. See Page - 15 -
Set Plunger. See Page - 15 - Figure - 9 -
Insert R tool holder in head.
Set tool with micrometer and lock in place. See Page - 16 -
Lower sleeve carefully until tool is 1/16" above top of block.
Set stop rod according to bore length and engage feed.
Lap finishing F tool while rough boring. See Page - 13 -
When machine stops, rotate head until the index line, below the centering handwheel is forward. Rotating the
head and tool to this position will eliminate any marking of the cylinder by the tool when retracting.
Press retraction release plunger to retract sleeve from cylinder.
FINISH BORE
Remove roughing tool and install finishing F tool.
Set micrometer to desired finished size and proceed as before.
When bore is complete, turn boring head, by grasping vertical drive shaft, until the index line, below the centering
handwheel, is to the front of the machine and raise sleeve from bore.
Unclamp machine and move to next cylinder; then proceed in same manner.
CAUTION
ALWAYS CLOSE MICROMETER COVER AFTER SETTING TOOL.
CLEAN
MICROMETER HOLE IN BORING HEAD WITH BRUSH BEFORE INSTALLING
MICROMETER.
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