Toro Groundsmaster 4500-D Series Service Manual page 230

Assembly (Figure 119)
Hydraulic System: Service and Repairs
Note: When assembling the motor, check the marker line on each part to make
sure the parts are properly aligned during assembly.
1. Lubricate O-rings, pressure seals, back-up gaskets and wear plate grooves
with a thin coat of petroleum jelly. Lubricate all other internal parts freely
with clean hydraulic oil.
2. Install new seals into front flange
A. Press shaft seal into front flange until it reaches the bottom of the bore.
B. Install flange washer into front flange and then install retaining ring into
the groove of the front flange.
C. Install new dust seals into front flange.
3. Place front flange, seal side down, on a flat surface.
4. Install the pressure seals, flat side outward, into the grooves in the wear
plates. Follow by carefully placing the backup gaskets, flat side outward,
between the pressure seals and the grooves in the wear plate.
5. Apply a light coating of petroleum jelly to the exposed side of the front flange.
6. Lubricate the drive gear shaft with clean hydraulic oil. Insert the drive end
of the drive shaft through the wear plate with the pressure seal side down
and the open side of the pressure seal pointing to the inlet side of the motor.
Carefully install shaft into front flange.
7. Lubricate the idler gear shaft with clean hydraulic oil. Install idler gear shaft
into the remaining position in the front wear plate. Apply a light coating of
clean hydraulic oil to gear faces.
8. Install rear wear plate with pressure seal side up and open side of the
pressure seal pointing to the inlet side of the motor.
9. Apply a light coating of petroleum jelly to new O-rings and O-ring grooves in
the body. Install new O-rings to the body.
10. Install locating dowels in body. Align marker line on the body and front flange.
Do not dislodge seals during installation.
11. Gently slide the body onto the assembly. Firm hand pressure should be
sufficient to engage the dowels.
12. Check to make sure that the surface of the rear wear plate is slightly below the
face of the body. If the wear plate is not below the body, check assembly for
a shifted pressure seal, backup gasket or O-ring. Correct before proceeding.
13. Apply a light coating of petroleum jelly to the exposed side of the rear cover.
14. Place rear cover on assembly using marker line for proper location. Firm
hand pressure should be sufficient to engage the dowel pins.
(Figure 121):
IMPORTANT
Page 5–128 Groundsmaster ® 4500-D/4700-D
19245SL Rev A