4-79. HYDRAULIC PUMP REPAIR (M332 SN J039-001 THRU 159 AND J017-160 THRU 350
Install components of pump valve (20) by replacing
small steel ball (14), small valve spring (15), large
steel ball (16), and large valve spring (17).
Install new valve seal (18) using inserting tool.
Insert valve seal (18) into female portion of tool lip
first. Use male end of tool to push valve seal (18)
into pump (13). Install new pump valve plug (19) in
Install components of overload valve (27) by
replacing steel ball (21), valve plunger (22), valve
spring (23), valve screw (24), plug seal (25), and
valve plug (26).
Install components of pump assembly by replacing
preformed packing (9), sleeve (8), pump spring (7),
pump packing (6), and pump barrel (5). Open
release valve to allow air to bleed from pump barrel
(5) back into reservoir. Install pump piston (4) by
inserting it into pump barrel (5).
Install manual control lever (1) by placing link pin (3)
through pump piston (4) and lever (1) and attaching
two snap rings (2) to link pin (3).
Install pump link (10) by placinglinkpin(12) through
pump body to base of pump link (10) and attaching
two snap rings (11)toIink pin(12). Install remaining
link pin (12) through upper holes in pump link (10),
through remaining hole in manual control lever (1),
and attach two snap rings (11) to link pin (12).
Install pipe bushing (28) and cap assembly (29) on
The pump must be filled and have overload
release valve set before it can be reinstalled.
Failure to follow this caution can result in
damage to dolly sat hydraulic system.
. Install hydraulic pump (para 4-78).
. Adjust hydraulic pump overload valve (para 4-80).