ARMY TM 5-5420-212-23
MARINE CORPS TM 08676A-23/3
NOTE
Replace all seals when jack is stripped and overhauled.
(1)
Remove all grease, oil and dirt from jack surfaces.
(2)
Loosen release valve screw (1) 1 1/2 turns and press down ram as far as it will go.
(3)
Remove filler cap/dipstick (2).
(4)
Drain oil into suitable container, approximately 2 5/8 pints (1 1/2 liters).
(5)
Remove keeper plate (3), cap pin (4), lock washer (5), swivel cradle (6) and swivel cradle seat (7).
(6)
Remove six base screws (8).
(7)
Using a plastic mallet, tap the toe of the base (9) until free from seal, then drain off remaining oil into
container.
(8)
Continue tapping base with plastic mallet until it separates from body (10).
(9)
Remove pump plunger (11) from pump barrel (12).
(10)
Remove gasket (13) and filter (14).
(11)
Unscrew ram liner (15) from base by holding liner, possibly in a soft-jawed vice, and tapping base with
plastic mallet.
NOTE
Examine condition of oil remaining in base to give an indication of wear.
(12)
Remove pump barrel (12) by holding base in soft-jawed vice, and using box wrench or socket on barrel.
(13)
Remove sealing ring (16) from base.
(14)
Unscrew and remove screws (17) from release valve instruction plate (18), then remove plate.
(15)
Remove release valve screw (1), release valve (19) and spring (20).
(16)
Remove delivery valve screw (21), spring (22) and ball bearing (23).
(17)
Remove suction valve screw (24), spring (25) and ball bearing (26).
(18)
Remove grub screw (27) and ball bearing (28).
(19)
Push ram (29) out of bottom of liner (15) do not use excessive force and keep hand over bottom of ram so
that trigger guide (30) and compression spring (31) do not jump out.
(20)
Unscrew trip valve cage (32), remove spring (33), ball bearing (34) and lifter pin (35).
(21)
Remove ram packing (36) comprising seal and anti-extrusion (A.E) ring (37).
(22)
Remove valve head (38) and retaining spring (39).
(23)
Remove the retaining ring (40) and wiper ring (41) from inside the ram liner.
3-30
