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TM 5-2420-222-34
14-16.
LOADER BUCKET RELIEF VALVES MAINTENANCE.
This Task Covers:
a.
Removal
e.
Assembly
b.
Disassembly
f.
Installation
c.
Cleaning and Inspection
g.
Adjustment
d.
Repair
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Loader control valve assembly removed (see
•
Hydraulic fluid (Item 15, Appendix B)
TM 5-2420-222-20).
•
Rags (Item 28, Appendix B)
Tools/Test Equipment:
•
Dry cleaning solvent (Item 31, Appendix B)
•
General mechanic's tool kit
•
One repair kit
•
Field automotive shop set
•
Two preformed packings
References:
•
TM 5-2420-222-20
General Safety Instructions:
•
Dry cleaning solvent is flammable and must not be used near open flame. Use only in a well-ventilated area.
•
Compressed air used for cleaning purposes should never exceed 30 psi (207 kPa).
a.
REMOVAL
Remove relief valve (1) with assembled parts and preformed packing (3) from valve body (2). Discard preformed
packing.
b.
DISASSEMBLY
1.
Using retaining ring pliers, remove retaining ring (7) from relief valve (1).
2.
Remove retainer (8) from relief valve (1).
3.
Wrap relief valve (1) with a clean rag and place in vise with caps. Push down on valve seat (13) and compress
4.
Remove vent plug (9) and preformed packing (10) from relief valve (1). Discard preformed packing.
5.
Remove relief valve (1) from vise.
6.
Remove valve seat (13), preformed packing (11), washer (12), spring (6), and spring holder (4) with assembled
shims (5) from relief valve (1). Discard preformed packing.
NOTE
Note size and number of shims to ensure proper assembly.
7.
Remove shims (5) from spring holder (4).
14-80
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