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TM 5-2420-222-34
14-15.
LOADER BOOM AND BUCKET VALVES REPAIR.
This Task Covers:
a.
Disassembly
c.
Repair
b.
Cleaning and Inspection
d.
Assembly
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Loader control valve assembly disassembled (see
•
Abrasive cloth (Item 6, Appendix B)
paragraph 14-14).
•
Thread sealing compound (Item12, Appendix B)
Tools/Test Equipment:
•
Detergent (Item 13, Appendix B)
•
General mechanic's tool kit
•
Hydraulic fluid (item 15, Appendix B)
•
Field automotive shop set
•
Rags (Item 28, Appendix B)
•
Dry cleaning solvent (Item 31, Appendix B)
•
One repair kit
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).
NOTE
Perform this task to repair both loader control valves. Boom valve is shown.
Repeat procedure for bucket valve as required.
a.
DISASSEMBLY
1.
Remove two screws (3), protective dust cap (4), bellows (2), washer (5), and preformed packing (6) from valve
body (32). Discard preformed packing.
2.
Position valve body (32) in vise with caps.
3.
Remove valve cap (20) from valve body (32). Remove valve body from vise.
4.
Hold clevis rod end (23) to prevent turning. Remove spool spring screw (19) from spool plug (14).
NOTE
Perform step 5 only if repairing boom valve. Perform step 6 only if repairing bucket
valve.
5.
Remove sleeve spacer (18), spring (16), and washer (15) from valve body (32).
6.
Remove sleeve spacers (17 and 18), spring (16), and washer (15) from valve body (32).
7.
Remove valve (12) with assembled parts, sleeve bushing (22), and preformed packing (21) from valve body (32).
Discard preformed packing.
8.
Wrap valve (12) in a clean rag and place in vise with caps.
9.
Remove clevis rod end (23), spring (25), fluid flow restrictor (11), and preformed packing (24) from valve (12).
Discard preformed packing.
14-74
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