Toro Groundsmaster 360 Service Manual page 200

Inspecting the Gear Pump (continued)
Assembling the Gear Pump
Hydraulic System: Service and Repairs
g033481
1. Gear shaft spline
2. Gear shaft
C. Gear face edge must be free from sharpness. The sharp edges of gears
will mill into the bearing blocks. Replace the gear pump if you find any
sharp gear face edge.
D. Bearing areas of the bearing blocks must not have excessive wear or
scoring.
E. Face of the bearing blocks that are in contact with the gears must be
free of wear, roughness, or scoring.
3. Inspect the front plate and back plate for damage or wear. If the plates are
damaged or worn, replace the pump.
Note: When assembling the pump, check the V-shaped marker line made during
disassembly to ensure that the components are properly aligned.
1. Lubricate new O-rings, pressure seals, and back-up seals with a thin coat
of petroleum jelly, and lubricate all internal pump parts freely with clean
hydraulic fluid.
2. Install new shaft seal in the front plate. Note the orientation of seal lips during
installation (Figure
Note: The seal should be pressed into place until it reaches the bottom
of the bore.
3. Install the retaining ring into the groove of the front plate.
4. Install the lubricated O-rings into the body.
5. Install the lubricated pressure seals into the machined grooves of the bearing
blocks and carefully place the back-up seals into the grooves.
6. Lubricate the gear faces and bearing surfaces of the drive gear, idler gear,
and bearing blocks with clean hydraulic fluid.
7. Use the identification marks that you made during disassembly and carefully
assemble the bearing blocks and gears.
8. Position the pump body on its side.
9. Use the identification marks that you made during disassembly and carefully
slide the bearing block and gear assembly into the body cavity.
Figure 140
3. Gear teeth
4. Gear face edge
139).
Page 4–142 Groundsmaster 360
16225SL Rev C