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TM 5-2420-222-34
3-5.
CYLINDER SLEEVE MAINTENANCE.
This Task Covers:
a.
Inspection
c.
Removal
b. Repair
d.
Installation
c.
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Engine assembly removed (see paragraph 3-3).
•
Engine oil (Item 25, Appendix B)
•
Engine oil pan removed (see paragraph 3-20).
•
Rags (item 28, Appendix B)
•
Cylinder head removed (see paragraph 3-6).
•
Dry cleaning solvent (Item 31, Appendix B)
•
Marker tags (Item 32, Appendix B)
•
One repair kit
Tools/Test Equipment
General Safety Instructions:
•
General mechanic's tool kit
•
Dry cleaning solvent is flammable and must not be
•
Field automotive shop set
used near open flame. Use only in a well-ventilated
area.
NOTE
Loader backhoe engine has four cylinder sleeves. All four are maintained the same
way. One Is shown. Repeat procedure for each remaining cylinder sleeve.
a.
INSPECTION
1.
Using thickness gage, measure clearance between piston (2) and cylinder sleeve (1) at bottom of piston skirt.
Clearance must be no greater than 0.006 in. (0.152 mm).
2.
Remove piston and connecting rod (see paragraph 3-11).
3.
Inspect cylinder sleeve (1) for cracks, scoring, glazing, discoloration, and abnormal wear.
4.
Using rod measuring kit, measure inside diameter of cylinder sleeve (1) at right angle to direction of piston pin, 1
in. (2.54 cm) from bottom and top.
5.
Subtract smaller measurement taken in step 1 from larger measurement taken in step 4 to determine taper.
Taper must be no larger than 0.002 in. (0.051 mm). If taper is larger than specification, replace cylinder sleeves
(1).
6.
Using rod measuring kit, measure inside diameter of cylinder sleeve (1) at several locations, 1 in. (2.54 cm) from
bottom and top.
7.
Subtract smallest measurement from largest measurement taken in step 6. Difference is out-of-round. Out-of-
round must be no larger than 0.002 in. (0.051 mm). If out-of-round is larger than specification, replace cylinder
sleeves (1).
b.
REPAIR
1.
If glazing of cylinder sleeve (1) was found, deglaze using vertical honing machine.
3-32
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