Toro Groundmaster 31900, Service Manual

Page: 166 / 355

Inspecting the Gear Pump (continued)
CAUTION
Use eye protection such as goggles when using compressed air.
2. Clean all parts with solvent. Dry all parts with compressed air.
3. Inspect the drive gear and driven gear for the following:
A. The gear shafts should be free of rough surfaces and excessive wear at
the thrust plate points and sealing areas.
B. The gear teeth should be free of excessive scoring and wear.
C. Inspect each gear face edge for sharp edges or burrs. Remove sharp
edges or burrs from the gear faces with emery cloth.
g240513
Figure 57
1. Gear shaft spline 3. Gear teeth
2. Gear shaft 4. Gear face edge
4. Inspect the thrust plates for the following:
A. The bearing areas should not have excessive wear or scoring.
B. The face of the thrust plates that are in contact with the gears should be
free of wear, roughness or scoring.
C. The thickness of the thrust plates should be equal.
5. Inspect the front cover and the rear cover for damage or wear.
Assembling the Gear Pump
Refer to Figure 55 for this procedure.
When assembling the pump, check the marker line on each part to make sure
the parts are properly aligned during assembly. When assembling the pump,
check the marker line on each part to make sure the parts are properly aligned
during assembly.
1. Lubricate the body seals, pressure seals, uni-rings and the thrust plate
grooves with a thin coat of petroleum jelly. Lubricate all other internal parts
freely with clean hydraulic oil.
2. Install new seals, the backup washer, and the retaining ring in the front cover.
Hydraulic System: Service and Repairs Page 5–80 Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A