Service Manual

Reassembly
57 Before reassembling the Transaxle Series
750,
clean all parts and assemblies with clean solvent
and blow them dry with compressed air. Inspect and
replace all scratched or damaged parts. Replace all
gaskets, shaft seals and O-rings. Lubricate all shaft
seals and O-rings with petroleum jelly (Vaseline) for
retention during assembly. Freely lubricate all
bearings and finished part surfaces with clean
hydraulic fluid to provide lubrication at start-up.
Housing Reassembly
58 Position the housing assembly on its side.
Lubricate and install the brake shaft seal with the
seal lip pointing away from the housing. Press or
drive the seal into the counterbore.
59 Turn the housing assembly over and repeat the
same procedure for the other brake shaft seal.
60 Lubricate and install the O-ring in the groove
located in the dump valve bracket.
61 Install the spring on the dump valve bracket with
the right angle bend of the spring pointing inward.
62 With the housing assembly in an upright
position, install the spring and dump valve bracket in
the housing assembly. The spring is properly
installed when the longest leg points toward the
check valve assembly.
63 Lubricate and install the O-ring around the
dump valve nut.
64 Install the nut over the dump valve bracket, into
the housing assembly, making sure you do not
damage the dump valve O-ring during installation.
Torque the dump valve nut to
150 Ib-in.
65 Reposition the housing assembly. Install the
cam ring assembly in the housing assembly with the
flush side of the cam ring facing outward.
66 Install the cam ring insert on the control shaft
pivot dowel.
67 Install the control shaft assembly, first aligning
the cam ring insert with the cam ring assembly and
then with the housing assembly.
68 Remove the rubber band from the pump rotor
assembly. Lubricate and install the pump rotor
assembly on the pump journal located in the housing
assembly.
69 install the cover gasket on the housing
assembly.
70 Install the drive in the pump rotor assembly.
Cover Reassembly
71 Lubricate and install the control shaft seal with
the seal lip pointing inward. Press or drive the seal
into the seal counterbore.
72 Lubricate and install the input shaft seal with
the seal lip pointing inward. Press or drive the seal
into the counterbore.
73 Press or drive the input shaft assembly into the
cover.
74 Install the retaining ring on the input shaft,
making sure it is firmly seated in the retaining ring
groove.
75 Apply a small amount of petroleum jelly to the
buttons for retention during assembly. Install the
buttons in the cover assembly.
76 Install the cover assembly by carefully aligning
it with the control shaft, cam ring pivot dowel and
pump rotor drive.
77 After engaging the control shaft and pivot dowel
in the cover assembly, carefully rotate the input shaft
to engage the pump rotor drive. When all mating
parts are aligned and engaged, the cover assembly
should fall into position on the housing assembly.
78 Install the hex flange screws in the cover
assembly and torque them to
125 Ib-in.
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