ARMY TM 9-6115-464-34
AIR FORCE TO 35C2-3-445-2
NAVY NAVFAC P-8-624-34
To disassemble transfer pump, lift out transfer pump seal (68), liner (72), blades (71), and springs
Remove the speed droop adjusting cap assembly (73) by pulling it from control rod guide (75).
Remove and discard control spring pin (78).
Discard seals (74 and 77), control rod guide (75) and washer (76).
Use care not to bend control rod. Failure to observe this caution could result in
Disengage governor spring (80) from the governor arm (86), then remove the governor spring and
control rod assembly (79).
Remove the metering valve (93) and arm assembly (91 ) from the hydraulic head.
Remove head locking screws (136 and 137) from the pump housing (152).
Invert pump and holding fixture as a unit and remove head locating screw (1 06), advance screw hole
plug (103). Remove the advance spring and power piston plugs (96 and 108). Using the cam
advance screw removal bushing, part number 15500, and the Bristol socket cam advance screw
wrench, part number 15499, remove the cam advance screw (105).
The sides of the housing just above the advance bears a C denoting clockwise pump
rotation as viewed from the drive end. The power side of the piston is located on the
C side of a clockwise rotation pump.
Invert the holding fixture in the vise. Grasp the hydraulic head firmly in both hands and withdraw with
a slight rotary motion. Use caution not to drop the governor weights (113).
To disassemble the governor, invert the hydraulic head and rotor assembly and let the governor
weights (113), governor thrust sleeve (114) and governor thrust sleeve washer (115) fall into your
Place the hydraulic head assembly on pump holding fixture so that the governor weight retainer (1 19)
engages the bar on the fixture.
Remove pivot shaft nut (81 ) and seal (83) from one side of pivot shaft (85). Slide pivot shaft out one
side of the housing and lift out governor arm (86).
Using a 5/32 inch Allen wrench, loosen the delivery valve retainer screw (130) and remove it.
Lift head and rotor assembly and shake delivery valve stop (131), spring (132), and delivery valve
(133) into the hand. If delivery valve sticks, remove using extractor. Discard delivery stop.
Using a smallbladed screwdriver or a dull scribe, disengage and remove the rotor retainer snap ring
(116). This releases the rotor retainers which should now be moved outward as far as possible to
clear the rotor.
When the rotor retainers are removed, the rotor is no longer retained in the head.
Failure to observe this caution could result in equipment damage.
Gently lift the hydraulic head off the distributor rotor (135). Invert the hydraulic head and shake out
the rotor retainers (117).