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TM 5-2420-222-34
14-8.
JAW CONTROL VALVE ASSEMBLY REPAIR.
This Task Covers:
a.
Disassembly
c.
Repair
b.
Cleaning and Inspection
d.
Assembly
Equipment Conditions:
Materials/Parts:
NOTE
•
Hydraulic fluid (Item 15, Appendix B)
•
Rags (Item 28, Appendix B)
Perform the following only for loader
•
Dry cleaning solvent (Item 31, Appendix B)
backhoes with serial numbers 235786-235999.
•
Eight preformed packings
•
Jaw control valve assembly removed (see
Tools/Test Equipment:
TM 5-2420-222-20).
•
General mechanic's tool kit
NOTE
•
Field automotive shop set
Perform the following only for loader backhoes
with serial numbers 319995-342573.
General Safety Instructions
•
Jaw direct linear valve removed (see TM 5-2420-
•
Dry cleaning solvent is flammable and must not be
222-20).
used near open flame. Use only in a well-ventilated
area.
a.
DISASSEMBLY
1.
Remove two screws (1) and seal retaining plate (2) from valve body (9).
2.
Remove two capscrews (15) and valve cap (14) from valve body (9).
3.
Hold directional control slide (5) to prevent turning, and remove shouldered screw (16).
4.
Remove two spring seats (17) and spring (18) from valve body (9).
5.
Remove seal retaining plate (19).
6.
Remove directional control slide (5) from other end of valve body (9).
7.
Remove two seats (3) and preformed packings (4). Discard preformed packings.
8.
Place valve body (9) in vise with caps.
9.
Remove plug (10) and preformed packing (11) from valve body (9). Discard preformed packing.
10.
Remove main relief (6) with assembled parts and spring (7) from valve body (9).
11.
Remove preformed packing (8) from main relief (6). Discard preformed packing.
12.
Remove plug (13) and preformed packing (12) from valve body (9). Discard preformed packing.
14-40
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