Toro Workman 3000 Series, Service Manual

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Rev. D 29.2 Page 9 -- Workman 3000/4000 Series Hydraulic System
IMPORTANT: Make sure to not damage the seal
bores when removing the seal from the front cover
and rear flange.
10.Carefully remove retaining ring and shaft seal from
front cover. Discard seal.
Inspection
1. Remove any nicks and burrs from all parts with
emery cloth.
CAUTION
Use eye protection such as goggles when using
compressed air.
2. Clean all parts with solvent. Dry all parts with com-
pressed air.
3. Inspect drive and idler shafts for the following (Fig.
23.3):
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 wear plates and, thus,
must be replaced.
4. Inspect thrust plates for the following:
A. Bearing areas should not have excessive wear or
scoring.
B. Face of thrust plates that are in contact with gears
should be free of wear, roughness or scoring.
C. Thickness of thrust plates should be equal.
5. Inspect front cover and rear flange for damage or
wear.
Assembly (Fig. 23.1)
NOTE: When assembling the pump, check the marker
line on each part to make sure the pump components
are properly aligned during assembly (Fig. 23.2).
1. Lubricate O--rings, pressure seals, back--up seals
and thrust plate grooves with a thin coat of petroleum jel-
ly. Lubricate all other internal parts freely with clean Dex-
ron III ATF.
1. Gear shaft spline
2. Gear shaft
3. Gear teeth
4. Gear face edge
Figure 23.3
3
4
1
2
2. Press new shaft seal into front cover until it reaches
the bottom of the bore and secure with retaining ring.
3. Install the lubricated pressure and backup seals into
the grooves in the front and rear thrust plates. Install lu-
bricated O--rings to the body.
4. Place front cover, seal side down, on a flat surface.
Apply a light coating of petroleum jelly to the exposed
side of the front cover.
5. Lubricate the drive shaft with clean Dexron III ATF.
Carefully insert the drive end of the drive shaft through
the front thrust plate with the pressure seal side down.
IMPORTANT: When installing drive shaft into front
cover, make sure that shaft seal (item 2) is not dam-
aged.
6. Carefully install shaft with front thrust plate into front
cover taking care to not damage shaft seal.
7. Lubricate the idler shaft with clean Dexron III ATF.
Install idler shaft into the remaining position in the front
thrust plate. Apply a light coating of clean hydraulic oil
to gear faces.
8. Install rear thrust plate with pressure seal side up and
open side of the seals pointing to the inlet side of the
pump.
9. Install two (2) dowel pins into front cover. Align mark-
er line on the body and front cover.
IMPORTANT: Do not dislodge seals during installa-
tion.
10.Gently slide the body onto the assembly. Firm hand
pressure should be sufficient to engage the dowel pins.
11.Align marker line on the body and rear flange.
Hydraulic System