Toro Groundsmaster 360 Service Manual page 199

4-wheel drive models with yanmar engine
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Disassembling the Gear Pump (continued)
Inspecting the Gear Pump
Groundsmaster 360
16225SL Rev C
6. Remove the front plate from the body and then remove the back plate.
7. Locate and remove the 2 dowel pins (item 13 in
Mark the relative positions of the gear teeth and bearing blocks so
that you can assemble them in the same position. Do not touch the
gear surfaces as residue on hands may be corrosive to gear finish.
8. Place the pump on its side and push on the rear bearing block to remove the
bearing blocks and gear set from the pump body.
Note: The pressure seals and back-up seals fit in the grooves machined into
the bearing blocks. The O-rings fit in the grooves machined in the pump body.
9. Carefully remove and discard the O-rings, pressure seals, and back-up seals
from the pump body and bearing blocks.
Note: Do not damage the machined grooves during the removal process.
10. Turn the front plate over, with seal side up, and remove the retaining ring.
Ensure that you do not damage the counterbore when removing the
shaft seal from the front plate.
11. Carefully remove the shaft seal from the front plate
orientation of seal lips during removal. Discard the seal.
12. If necessary, remove the implement relief valve from the back plate. Remove
and discard the sealing washers.
Use eye protection such as goggles when using compressed air.
1. Clean all the pump parts with solvent and dry them with compressed air.
2. Inspect the drive gear, idler gear, and bearing blocks for the following. If
damage is found, replacement of the gear pump is necessary.
A. Gear shafts must be free of rough surfaces and excessive wear at the
bushing points and sealing areas. Replace the gear pump if you find any
scoring, rough surfaces, or wear on the gear shafts.
B. Gear teeth must be free from excessive scoring and wear. Replace the
gear pump if you find broken or nicked gear teeth.
IMPORTANT
IMPORTANT
CAUTION
Page 4–141
Figure
137) from the body.
(Figure
139). Note the
Hydraulic System: Service and Repairs

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