TM-5-4310-389-14
5-4. LOWER CRANKCASE AND TENSION PULLEY ASSEMBLY (COMPRESSOR)
DESCRIPTION
This task covers: Repair
INITIAL SETUP
Tools:
Equipment conditions:
General Mechanic Tool Kit
Equipment secured (paragraph 2-11)
Upper crankcase removed
Materials/parts:
(paragraph 5-3).
Alcohol, Isopropyl, item 1 Appendix E
Drain oil from crankcase
Apron, Rubber, item 5 Appendix E
(paragraph 3-16, c).
Bag, Plastic, item 6 Appendix E
4th stage valve head re-
Cloth, Lint-free, item 9 Appendix E
moved (paragraph 4-8, c).
Detergent, Non-ionic, item 13 Appendix E
Gloves, Rubber, item 17 Appendix E
Grease, Halo Carbon, item 19
Shield, Face, item 26 Appendix E
Silicone, RTV Sealant, item 28 Appendix E
Trisodium Phosphate, item 31 Appendix E
Water, Distilled, item 32 Appendix E
REPAIR
NOTE
Disassembly of lower crankcase can be done with the upper crankcase assembled or disassembled.
Usually, the upper and lower crankcase are disassembled at the same time. The only exception would be
for crankshaft, camshaft bearing, or oil pump failure.
a.
Disassembly (disregard, if not needed).
1.
Remove the four allen head bolts (2) from the oil pump timing belt cover (1) (figure 5-3).
2.
Remove timing belt adjusting pulley (7) and the crankshaft pulley (3). Remove oil pump belt (14).
5-9
