TM-5-4310-389-14
4-8 VALVE HEAD ASSEMBLY (1ST, 2ND, 3RD, AND 4TH STAGES) (COMPRESSOR).
DESCRIPTION
This task covers:
Inspect.
Replace.
Repair.
INITIAL SETUP
Tools:
Equipment conditions:
General Mechanics Tool Kit
1. Equipment secured
Lapping Plate
(paragraph 2-11).
Torque Wrench
2. Bleed system pressure
(paragraph 2-3, b).
Materials/parts:
Alcohol, Isopropyl, item 1 Appendix E
Apron, Rubber, item 5 Appendix E
Bag, Plastic, item 6 Appendix E
Cloth, Lint-free, item 9 Appendix E
Compound, Lapping and Grinding,
item 10 Appendix E
Detergent, Non-ionic, item 13 Appendix E
Gloves, Rubber, item 17 Appendix E
Grease, Halo Carbon, item 19 Appendix E
Shield, Face, item 27 Appendix E
Trisodium Phosphate, item 31 Appendix E
Water, Distilled, item 32 Appendix E
INSPECT
a.
Changing valves of the 1st stage. Refer to figure 4-4.
1.
Remove acorn nut (1).
2.
Screw out stud (2) a number of turns (until loose).
3.
Remove and discard gasket (3) if necessary.
4.
Remove valve cover nuts (4), washers (5), and valve cover (6).
5.
Remove and discard 0-ring (7).
6.
Take off valve cap (8) and extract the valve (9).
4-27
