Toro Groundsmaster 7200 Service Manual page 117

6. Remove front plate from the body, then remove back
plate. Locate and remove dowel pins from body.
IMPORTANT: Mark the relative positions of the gear
teeth and bearing blocks so they can be assembled
in the same position. Do not touch the gear surfaces
as residue on hands may be corrosive to gear finish.
7. Place pump on its side and push on the rear bearing
block to remove bearing blocks and gear set from the
pump body.
NOTE: Pressure seals and back–up rings fit in grooves
machined into bearing blocks. O–rings fit in grooves ma-
chined in the pump body.
8. Carefully remove and discard O–rings, pressure
seals and back–up rings from pump body and bearing
blocks. Do not cause any damage to the machined
grooves during the removal process.
9. Turn front plate over, with seal side up and remove
the retaining ring.
IMPORTANT: Make sure to not damage the counter
bore when removing the shaft seal from the front
plate.
10.Carefully remove shaft seal from the front plate.
11. If necessary, remove implement relief valve from
back plate. Remove and discard sealing washers.
Inspection
CAUTION
Use eye protection such as goggles when using
compressed air.
1. Clean all pump parts with solvent. Dry all parts with
compressed air.
2. Inspect drive gear, idler gear and bearing blocks for
the following. If damage is found, pump replacement is
necessary.
A. Gear shafts should be free of rough surfaces and
excessive wear at bushing points and sealing areas.
Scoring, rough surfaces or wear on gear shafts indi-
cates need for replacement.
B. Gear teeth should be free of excessive scoring
and wear. Any broken or nicked gear teeth must be
replaced.
C. Inspect gear face edge for sharpness. Sharp
edges of gears will mill into bearing blocks and, thus,
must be replaced.
Groundsmaster 7200/7210
D. Bearing areas of bearing blocks should not have
excessive wear or scoring.
E. Face of bearing blocks that are in contact with
gears should be free of wear, roughness or scoring.
3. Inspect front plate and back plate for damage or
wear. Replace pump if plates are damaged or worn.
1
1. Gear shaft spline
2. Gear shaft
Assembly (Fig. 96)
NOTE: When assembling the pump, check the V–
shaped marker line made during disassembly to make
sure components are properly aligned.
1. Lubricate new O–rings, pressure seals and back–up
gaskets with a thin coat of petroleum jelly. Lubricate all
internal pump parts freely with clean hydraulic oil.
2. Install new shaft seal in front plate. Seal should be
pressed into place until it reaches the bottom of the bore.
3. Install retaining ring into the groove of the front plate.
4. Install lubricated O–rings to the body.
5. Install lubricated pressure seals into the machined
grooves of the bearing blocks and follow by carefully
placing the back–up rings into the grooves.
6. Lubricate gear faces and bearing surfaces of drive
gear, idler gear and bearing blocks with clean hydraulic
oil. Carefully assemble bearing blocks and gears noting
identification marks made during disassembly.
7. Position the pump body on its side. Carefully slide
bearing block and gear assembly into the body cavity
using identification marks made during disassembly.
8. Remove any excess lubrication from mating sur-
faces of body, back plate and front plate. Make sure that
these surfaces are clean and dry.
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3
2
4
Figure 98
3. Gear teeth
4. Gear face edge
Hydraulic System