TM 10-4320-307-24
4-18
CYLINDER BLOCK INSPECT/REPAIR/REPLACE (CONT)
REPAIR:
1.
Replace cylinder block if:
a.
Cylinder block is cracked, overheated, distorted, or seriously damaged.
b.
Cylinder block machined surfaces are severely rusted or corroded.
c.
New camshaft bushing will not seat properly in crankcase.
d.
Cylinder block bore for camshaft bushing is outside tolerance limits.
e.
Cylinder seats are worn, not flat, or damaged beyond repair.
2.
Remove minor rust, corrosion, nicks, or burrs on crankcase. Use crocus cloth to smooth out surfaces if necessary.
Clean and refinish nonmachined surfaces. Allow finish to dry. Do not finish machined surfaces. Retap screw threads
in cylinder block if necessary.
3.
Repair minor nicks, burrs, rust, or corrosion on cylinder liner seats with crocus cloth. Resurface seats if they cannot
be cleaned up.
ASSEMBLY:
1
Install camshaft bushings as follows:
a.
Make sure oil supply holes are clean in
cam-shaft bushing bore.
b.
Use camshaft bushing tool that was used to
remove bushings.
c.
Slide bushing onto driver and align oil holes
in bushing with oil holes in bore.
d.
Hit slide hammer against shaft until bushing
is in position in bore.
e.
Make sure oil holes in bushing and bore are
in alignment. The alignment notch in bush-
ing for No. 7 bore must align with oil drain in
bore.
4-140
