4-76. HYDRAULIC PUMP REPAIR (M832 EXCEPT SN J089-001 THRU 159 AND J017-160
This Task Covers:
b. Cleaning and Inspection
Hydraulic pump removed and placed on
Hydraulic fluid (Item 6, Appendix E)
workbench (para 4-75).
Rags Item 11, Appendix E)
Dry cleaning solvent (Item 14, Appendix E)
One preformed packing
General mechanics tool kit
One rubber bushing
Remove two link pin assemblies (12) and link (11) from hydraulic pump (20) and lever (3).
Remove link pin assembly (4) and lever (3) from piston (5).
Remove piston (5), barrel (6), packing (7), spring (8), sleeve (9), and preformed packing (10) from hydraulic
pump (20). Discard packing and preformed packing.
Loosen nut (18) and remove stud (17) and nut from release valve (16).
Remove release valve (16), ball (15), and rubber bushing (14). Discard rubber bushing.
Note position of components In steps 6 and 7 for assembly.
Remove six components of overload valve (19).
Remove SIX components of pump valve (13) from hydraulic pump (20).
Remove cap assembly (2) and bushing (1).
b. CLEANING AND lNSPECTION
Dry cleaning solvent, P-D-680, Is toxic and flammable. Always wear protective goggles
l nd gloves, l nd use only in a well-ventilated are.. Avoid contact with akin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or exceesive heat
The solvents flash point Is 100°F-138°F (38°C-59°C). If you become dizzy while
using cleaning solvent, Immediately get fresh air and medical help. If solvent contacts
eyes, immediately wash your eyes and get medical aid.
Clean all metal components with dry cleaning solvent and wipe with clean, dry, lint-free rags.
Clean inside of hydraulic pump and reservoir by flushing with dry cleaning solvent.