TM 9-2815-237-34
c. Bearings. See TM 9-214.
d. Studs. Replace all bent and stretched studs. Repair minor thread damage with a thread restorer file.
Replace studs having stripped or damaged threads as outlined below:
(1) Remove, using a stud remover. Back studs out slowly to avoid heat buildup and seizure which
can cause stud to break off.
(2) If studs break off too short to use with a stud remover, use extractor to remove.
(3) Replacement studs have a special coating and must have a small amount of antiseize compound
(Appendix B, Item 3) applied on threads before stud is installed. Install replacement stud slowly to prevent
heat buildup and snapping off.
e. Gears.
(1) Remove gears using pullers, as required.
(2) Use the same methods described in paragraph 2-11.b.(2) for castings tO remove minor nicks,
burrs, or scratches on gear teeth.
(3) If keyways are worn or enlarged, replace gear.
f. Bushings and BushingType Bearings. When bushings and bushing-type bearings seize to a
shaft and spin in the bore, the associated part must also be inspected and replaced, as required.
g. Oil Seals.
(1) Remove oil seals, being careful not to damage casting or adapter bore.
(2) Always install new seal in bore using proper seal replacing tool.
h. Cylinder Block or Cylinder Head. Repair of cylinder block and cylinder head is limited to
procedures outlined in paragraphs 2-16 and 2-21. Cylinder block or cylinder head must be replaced if
measurements are outside tolerance limits listed in table 2-2 or table 2-3.
2-12. ASSEMBLY
a. Cleanliness is essential in all component assembly operations. Dirt and dust, even in minute
quantities, are abrasive. Parts must be cleaned as specified, and kept clean. Wrap or cover parts and
components when assembly procedures are not immediately completed.
b. Coat all bearings and contact surfaces with engine oil (MIL-L-2104) to ensure lubrication of parts
during initial operation after repair.
c. Use new gaskets and preformed packings during assembly of all components.
2-6
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