4-82. HYDRAULIC PUMP REPAIR (M840) (Cont).
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective goggles
and gloves, and use only in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or excessive heat.
The solvent's 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.
Inspect components for damage and wear. Replace damaged or wom parts.
Apply clean hydraulic fluid to surface of all components and interior of pump housing.
Install screen (36) and pipe plug (37) to pump housing (27).
Install ball bearing (19), spring (18), and valve adjusting plug (17) to relief valve (20).
Install new packing (21) and relief valve (20) to pump housing (27).
Install release valve (32) to valve spindle assemby (33) with pin (28).
Install three new packings (35), insert (34), and valve spindle assembly (33) to pump housing (27). Do not fully
Install lever (31) with end of lever facing PUMP position and Install new lockwasher(30) and screw (29). Tighten
Install new ball (26), new ball bearing (25), new spring (24), new packing (23), and valve adjusting screw (22).
Install cylinder (38) to pump housing (27).
Install new packing retainer (12), new packing(11) and piston retaining nut (10) to cover (15).
Loosely install new gasket (16) and cover (15) to pump housing (27) with six bolts (2). Install dipstick (3).
Install new gasket (9) and new piston (1).
install new spring pin (7) to beam (4).
If removed, Install new pin (8) to balm (4).
If removed, install plate (13) to cover (15) with two screws (14).
Install beam (4) to top of hydraulic pump with grooved pin (6) and two retaining rings (5).