ARMY TM 5-5420-212-23
MARINE CORPS TM 08676A-23/3
Turn body right way up and insert sealing ring (53) into groove inside top of body.
Replace valve head (38) and retaining spring (39) on ram liner (15). Ensure spring portion of retaining
spring is over valve head-not wire.
Ensure that seal is fitted with wiper edge (sharp edge) uppermost.
Replace wiper ring (41) and retaining ring (40).
Stand ram (29) upside down so that preformed packing (36) and A.E ring (37) can be fitted.
Place A.E ring (37) in position on ram with flat side downward to ram.
Work preformed packing (36) onto ram until it locates correctly under flange.
Insert spring (31 ) and trigger guide (30), ensuring that it is operating correctly. Ensure that slot in trigger
guide is pointing towards ram packing (36).
Assemble lifter pin (35), ball bearing (34), spring (33) and trip valve cage (32) in hole, and screw trip valve
cage into ram until firmly seated. With the ram packing uppermost hold trigger guide assembly (30) in
position, with slot upwards so that lifter pin (35) locates in slot. Test for correct assembly. Trigger guide
(30) should spring backwards and forwards smoothly and trigger must spring downwards when pushed
Smear oil on ram and inside of liner.
Ensure that A.E ring does not damage edge of liner bore.
Hold ram in one hand and retaining trigger guide (30) in hole, use other hand to insert upper part of ram
into liner until trigger guide is just located inside liner bore, then carefully feed A.E ring (37) into bore with
preformed packing (36).
Replace grub screw (27) and ball bearing (28) in base. Tighten to 50 ft lb.
If suction valve washer (50) was found damaged on inspection, replace with new item, then assemble ball
bearing (26), spring (25) and screw (24) and tighten to 50 ft lb.
If delivery valve washer (49) was found damaged on inspection replace with new item, then assemble ball
bearing (23), spring (22) and screw (21 ) and tighten to 50 ft lb.
Replace sealing ring (54) on release valve (19), then assemble spring (20), release valve (19) and release
valve screw (1) and tighten hand tight only.
Fit release valve instruction plate (18) and secure with screws (17).
If pump barrel washer (51) was found damaged on inspection, replace with new item, then screw pump
barrel (12) into base and tighten to 90 ft lb.
Remove pump plunger seal (55) from pump plunger (11) and replace with new.
If retaining clip (56) requires replacing, lock with clip ferrule or locking wire (57).