TM 55-4920-394-13&P
ad. Thread this entire assembly into tapped hole in end of pump shaft (82), making certain that top of spring
retainer and small tapped hole falls between spline teeth in cylinder barrel (56). Insert, socket head cap screw
(43) and tighten securely.
ae. To set spring, load screw (45) into spring retainer (44) until top of screw is flush with top of spring
retainer and small tapped hole falls between spline teeth in cylinder barrel (56). Insert socket head cap screw
(43) and tighten securely.
af. Press dowel pin (42) into pin (40).
ag. Aligning dowel pin (42) with key way in piston and shoe retainer (41), press pin (40) into hole in retainer.
ah. Press bearing (39) into wear plate (34). Bearing must have widest gap between inner and outer race
toward hanger side of wear plate.
ai. Slip on (40) into bearing bore and set wear plate (34) gently against shoes of piston and shoe retainer
assembly (41). Lubricate wear faces liberally.
aj. Slip lockwasher (38) over threaded end of pin (40) placing tang of lockwasher in key way of pin.
ak. Slip second lockwasher (37) over pin, making tang of washer fit into the second pin key way.
al. Thread lock nut (36) onto pin (40) until nut is snug against lockwashers and bearing. Do not overtighten.
am. Back off lock nut 1/16 to 1/8 turn to give 0.002 to 0.004 clearance between lock nut and bearing. Turn
nut so that slot in nut lines up with tang on washer (37).
an. Check adjustment by rotating each shoe in piston and shoe retainer assembly (41). Slight movement
should be felt. Since shoe sole thickness is not quite uniform, some shoes may be tighter than others but all
should move without requiring excess force.
ao. Bend tang of lockwasher (37) into slot in lock nut (36).
ap. Thread hex socket pipe plug (35) into end of pin (40) and tighten securely. Check locking action of plug
by trying to loosen lock nut with a slight wrench force.
aq. Insert pistons of piston and shoe retainer assembly (41) into bores of cylinder barrel (56), then slide
assembly into barrel. Lubricate all parts liberally.
ar. Press dowel pin (29) into face of hanger (26).
as. Position hanger (26) in hanger housing (91), sliding dowel pin (29) into hole in wear plate. Slip trunnion
pins (23) through
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