4-79. HYDRAULIC PUMP REPAIR (M832 SN J089-001 THRU 159 AND J017-160 THRU 350
This Task Covers:
b. Cleaning and Inspection
Hydraulic pump removed and placed
Dry cleaning solvent (Item 14, Appendix E)
on workbench (para 4-78).
Hydraulic fluid (Item 6, Appendix E)
Hydraulic parts kit
General mechanics tool kit
This task is for the M832 SN J089-001 thru 159
and SN J017-150 thru 350 only.
Remove four snap rings (11 ) from two link pins (12).
Remove link pins (12) and pump link (10) from hydraulic
Remove two snap rings (2) from link pin (3) at manual
control lever (1). Remove link pin (3) and manual control
lever (1) from pump piston (4).
Remove pump piston (4), pump barrel (5), pump packing
(6), spring (7), sleeve (8), and preformed packing (9) from
hydraulic pump(13). Discard pump packing and preformed
Note position of components in steps 4 and
5 for assembly purposes.
Remove six components of overload valve (27) from pump
(13) body by removing plug screw (26) and plug seal (25).
Remove valve screw (24) from pump (13). Tip pump (13)
forward to remove valve spring (23), valve plunger (22),
and steel ball (21). Discard all six components.
Remove six components of pump valve (20) from pump
(13) body by removing pump valve plug (19) and pump
valve seal (18). Tilt pump (13) to remove small valve
spring (15), large valve spring (17), small steel ball (14),
and large steel ball (16). Discard all six components.