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TM 5-2420-222-34
14-17.
HYDRAULIC HOSES, LINES, AND FITTINGS REPAIR.
To repair hydraulic hoses, lines, and fittings, refer to General Maintenance instructions (see paragraphs 1-25 and
1-27).
14-18.
JAW CYLINDER ASSEMBLY REPAIR.
This Task Covers:
a.
Disassembly
c.
Repair
b.
Cleaning and Inspection
d.
Assembly
Initial Setup:
Equipment Conditions:
Materials/Parts:
•
Jaw cylinder assembly removed (see TM 5-2420-
•
Abrasive cloth (Item 6, Appendix B)
222-20).
•
Hydraulic fluid (Item 15, Appendix B)
Tools/Test Equipment:
•
Rags (Item 28, Appendix B)
•
Dry cleaning solvent (Item 31, Appendix B)
•
General mechanic's tool kit
•
Seven preformed packings
•
Field automotive shop set
Personnel Required:
Two
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.
DISASSEMBLY
1.
Place hydraulic cylinder block (4) in vise with caps.
2.
Remove lubrication fitting (3) from hydraulic cylinder block (4).
3.
Remove electrical box connector (1) and preformed packing (2) from hydraulic cylinder block (4). Discard
preformed packing.
4.
Using spanner wrench, loosen retainer (13) from hydraulic cylinder block (4). Slide retainer back onto piston rod
(11).
NOTE
Use a drain pan to catch fluid when draining hydraulic cylinder block. Clean up all
spills.
5.
Loosen vise and tilt hydraulic cylinder block (4) to drain hydraulic fluid.
6.
Tighten vise. With the aid of an assistant, remove piston rod (11) with assembled parts from hydraulic cylinder
block (4).
14-84
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