Toro Greensmaster 3120 Service Manual page 131

Disassembling the Gear Pump (continued)
Inspecting the Gear Pump
Greensmaster 3120
17230SL Rev C
8. Clean all parts. Check all components for burrs, scoring, nicks and other
damage.
9. Replace the entire pump assembly if any pump components are excessively
worn or scored.
1. Remove any nicks and burrs from all parts with emery cloth.
Use goggles or other appropriate eye protection when using
compressed air for drying parts.
2. Clean all parts with solvent. Dry all parts with compressed air.
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1. Gear shaft spline
2. Gear shaft
3. Gear teeth
4. Gear face edge
3. Inspect the drive gears and the idler gears; refer to
A. The gear shafts should be free of rough surfaces and excessive wear at
the bushing points and the sealing areas. Scoring, rough surfaces or
wear on the gear shafts indicates the need for pump replacement.
B. The gear teeth should be free of excessive scoring and wear. Broken or
nicked gear teeth indicates the need for pump replacement.
C. Inspect the gear face edge for sharpness. Sharp edges of the gears
will cut into wear plates, and therefore, indicate the need for pump
replacement.
4. Inspect the thrust plates:
A. The bearing areas should not have excessive wear or scoring.
B. The face of the thrust plate that contacts the gears should be free of
wear, roughness or scoring.
C. The thickness of each set of thrust plates should be equal.
5. Inspect the front cover and the rear cover for damage or wear.
CAUTION
Figure 55
5. Thrust plate
6. Front cover
7. End cover
Page 4–85
Figure 55:
Hydraulic System: Service and Repairs