SECTION 29 - HYDROSTATIC TRANSMISSION
29-70
REASSEMBLY
IMPORTANT: Due to close tolerances and finish of
motor internal surfaces, it is important to maintain
absolute cleanliness during inspection and
reassembly or damage to the components may
occur.
Be sure all parts are clean and air-dried before
reassembly. Prior to assembling the motor, dip all
parts in the oil, SH/CG4 10W-30, that will be used in
the hydraulic reservoir. This motor must be shimmed
during reassembly. The shim kit gauge block used to
determine the shim pack is included in the seal kit for
the motor assembly.
1. Install the key, 1, in the shaft and the round
retaining ring, 2, in the groove.
Slide the piston block on the shaft with the 45°
chamfer, 3, in the inside diameter of the piston
block toward the round retaining ring, 2, on the
shaft.
149
2. Lubricate the solid pistons, 1, with system oil and
install them in the piston block bores from the
tapered end of the block, 2, with the tapered ends
facing outward. Be sure each piston moves freely
in its bore. It is suggested that the assembly be
held with one hand, as shown, so the pistons do
not fall completely through the block.
IMPORTANT: Do not damage the burr around the
piston holes in the block.
3. Slide spacer, 3, and pivot, 4, over the shoulder on
the shaft. Be sure the block assembly is resting
on the snap ring on the opposite end of the shaft.
NOTE: If the spacer and pivot assembly are not
completely down over the shoulder on the shaft as a
result of the block being off the snap ring, the
shimming procedure and motor operation will be
incorrect.
150
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