z.
Unscrew the servo housings (38) using channellock pliers to grip the flats on top of the housings.
NOTE
At this time the servo springs (50) should be removed if replacement is necessary as the
pump housing will provide a means of leverage when breaking the screws loose. Do not
reuse the screw (51) holding the spring (50) to the servo piston (54) as it has a nylon locking
insert that is not effective when reused. These springs should not be removed unless
necessary.
aa.
To remove springs, remove screw (51), washer (52), retainer (53) and spring (50).
ab.
The trunnions (55) should be marked to insure reassembly to the correct side of the housing. Remove the hex,
head screws (56) and washers (57) from each trunnion (55).
NOTE
Friction caused by the O-ring (58) on the trunnion may make it necessary to use a slide
hammer to pull the trunnion assembly.
ac.
Remove the trunnions (55) from housing. Be certain to keep the plastic shims (59) with the proper trunnion to
insure satisfactory bearing adjustment after reassembly. If bearing (60) is to be removed, it must be pulled from
the shaft of trunnion (55). The race (61) is a press fit in swashplate (46).
ad.
After both trunnion assemblies have been removed, the swashplate assembly can be removed from the pump
housing (70). The piston (54), pins (62,63, 64), snap rings (65, 66, 67) and links (68,69) may remain installed on
swashplate (46) unless parts are being replaced.
4-6.5.2 Assembly
a.
When installing the swashplate assembly (46) into the housing (70), the feedback link (68) must be laid back
along the top of the swashplate so it can be reached through the opening for the control valve. After installing
swashplate be certain feedback link is accessible.
b.
Press bearings (60) onto shafts of trunnions (55). Place shims (59) and O-rings (58) on trunnions.
c.
Install the trunnions (55), checking for proper orientation with the housing (70) and install the cap screws (56) and
washers (57). The swashplate (46) should have no sideplay yet rotate freely. If necessary, alter the plastic
shims (59) to obtain the proper adjustment. Torque screws (56) to 16-21 ft-lbs.
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