Transmission Motor Section - Toro Groundsmaster 300 Series Service Manual

Transmission Motor Section (Fig. 29, 30)
1. Separate the motor housing from the center section;
refer to "Separating Transmission Into Sections".
2. Lift the cylinder block assembly out of the motor
housing. The pistons may come out of the cylinder
block, but do not be concerned; they do not have a
special order in the cylinder block.
NOTE: Since the entire cylinder block assembly must
be replaced if it is defective, do not disassemble the
spring and other parts from center bore of the cylinder
b lo c k . C y l i nd er b lo c k c o m po nent s ar e no t
interchangeable.
3. Remove the thrust plate from the counterbore in the
motor housing.
4. If the motor shaft or bearing must be serviced, remove
the snap ring from the motor housing. Slide the motor
shaft and bearing out of the housing toward the
flange end. If the shaft sticks in the housing, tap it lightly
with a rubber hammer to remove it.
5. Clean and inspect the following parts:
A. Motor Valve Plate - Check for wear, scratches and
scoring.
B. Thrust Plate - Check both sides for damage and
flatness.
C. Cylinder Block Assembly-Check the surfaces for
wear, scratches and scoring. Also, check the slip-
pers for damage and make sure the pistons are free
in the bores of the cylinder block.
D. Ball Bearing - Check for free rotation and any
noticeable damage.
E. Motor Shaft - Check for scratches, scoring or
damaged splines.
NOTE: Replace any defective part. Remember that the
cylinder block assemblies must be replaced as a com-
plete component, not individual parts. Do not inter-
change parts between the motor cylinder block
assembly and the pump cylinder block assembly be-
cause the transmission will not operate at its optimum
capacity.
6. Lubricate the bearing with transmission oil. Press the
bearing onto the motor shaft. Slide the motor shaft and
bearing into the motor housing from the flange side.
Install the snap ring into the groove at the flange end of
the motor housing.
Repairs
NOTE: Make sure the splines at the end of the motor
shaft are toward the flange side of the motor housing.
7. Lubricate the thrust plate with transmission oil. Slide
the thrust plate onto the motor shaft and into the
counterbore of the motor housing.
8. Lubricate the motor cylinder block parts with trans-
mission oil. Assemble the cylinder block parts and slide
the cylinder block assembly onto the motor shaft. The
cylinder block must slide onto the splines near the
center of the shaft.
NOTE: Assure that the thrust plate remains seated in
the counterbore and that the piston slippers contact the
face of the thrust plate.
9. Push against the back of the cylinder block. A slight
spring pressure assures the correct installation of parts.
10. Assemble the transmission sections if no other
service work is required; refer to "Assembling Transmis-
sion Sections" which follows.
Page 5 - 38
Figure 29
Figure 30
®
Groundsmaster 300 Series