TM 55-4920-394-13&P
q. Secure barrel to bearing with six socket head screws (55). Tighten screws securely.
r. Slip port plate (57) over shaft (82) and into pilot bore of hanger housing (91), making sure that center hole
in port plate goes over dowel pin (58) in face of port block (59). Check to ensure that port plate is firmly seated
against port block face by trying to rotate port plate radially. Slight movement obtainable indicates that port
plate is properly installed.
s. Liberally lubricate barrel and bearing assembly (53), spline of shaft (82), and port plate (57), and, taking
care not to damage lapped surface of cylinder barrel, slip barrel into shaft spline and seat gently.
t. Install two screws (48) one at top and one at bottom of barrel and bearing assembly (53), along with two
shims (49) and two barrel stops (47). Clearance between barrel stops and inner race of barrel bearing should
be 0. 010 to 0. 015 inch. Shim as required to obtain proper clearance. Tighten screws securely against port
plate.
u. Press needle bearings (30) into hanger (26) and press down pin (29) into hanger face.
v. Press roll pin (31) into hanger. Press stop pin (33) into hanger until hole in stop pin aligns with hole in
hanger then insert roll pin (32) to lock stop (33) in place.
w. Slip O Ring (25) into groove on trunnion pin (23). Do this for both pins.
x. Position hanger (26) in hanger housing (91). Align trunnion bores on hanger with trunnion pin holes in
housing and slip trunnion bearings. Insert one screw (24) into each trunnion pin to hold pin in place.
y. Position hanger spacers (50) on each side of barrel and bearing assembly (53) with one shim (52) under
each spacer. Secure spacers and shims with screws (51).
z. Slide hanger (26) against spacer on one side and measure clearance between hanger and spacer.
Hanger should swing freely and should be centered within 0.010 inch on barrel and bearing assembly. Insert
required combination of shims under each spacer to achieve this clearance, always striving for an equal
number of shims under each
spacer.
aa. Swing hanger up until stop pin (33) contacts machined pad in hanger housing. Maximum hanger angle
measure from horizontal pump centerline should be 15 degrees, 30 minutes.
ab. Remove hanger from pump and continue reassembly.
ac. Slip spring (46) over screw (45) and insert screw into spring retainer (44).
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