Transmission Pump Section - Toro Groundsmaster 300 Series Service Manual

Transmission Pump Section (Fig. 24, 25, 26, 27)
1. Separate the pump housing from the center section;
refer to "Separating Transmission Into Sections,".
2. Lift the cylinder block assembly out of the pump
housing. Do not be concerned if the pistons come out
of the cylinder block because 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 the center bore of the
cylinder block. Cylinder block components are not inter-
changeable.
3. Remove the thrust plate from the counterbore in the
variable position swash plate.
4. Wrap the port side of the pump housing with a clean
rag to protect the face of the housing. Set the pump
housing on to a clean work bench.
5. Drive the spring pins through the swash plate and out
of the trunnion and control shafts.
NOTE: There are two spring pins on the control shaft
side of the pump housing and one pin on the trunnion
shaft side. The control shaft must have two pins be-
cause of the continuous "applied force" from the traction
pedal during operation.
6. Mark the control shaft and housing so the shaft can
be installed correctly when the parts are reassembled.
Slide a long punch through the hole at the end of the
control shaft and pull the shaft out of the bore in the
swash plate and pump housing.
7. Slide a 3/8 x 7 inch wooden dowel into the bore at the
control shaft side of the housing. Place the dowel
against the end of the trunnion shaft and drive it out of
the housing.
8. Lift the swash plate out of the pump housing and off
of the pump shaft.
9. If the pump shaft or bearing must be serviced, use
the following steps to remove the parts:
A. Remove the snap ring from the housing.
B. Slide the pump shaft and bearing out of the
housing, toward the large open end.
C. Remove the snap ring from the shaft.
D. Press the bearing off of the pump shaft, toward
the keyed end.
®
Groundsmaster 300 Series Page 5 - 35
Figure 24
Figure 25
Repairs