Toro Workman HDX Auto Service Manual page 219

6. Remove pump from the vise and position pump so
that the shaft end is facing down. Remove screws.
7. Carefully lift rear flange from body.
8. Carefully remove body. Lift body straight up to re-
move. Make sure the rear thrust plate remains on the
drive and idler gear shafts. Locate and retrieve dowel
pins.
IMPORTANT: Note position of the open and closed
side of the thrust plates before removing. Also, iden-
tify thrust plates (front and rear) with a marker for
proper assembly.
9. Carefully remove rear thrust plate, idler shaft, drive
shaft and front thrust plate from the front cover.
10.Remove and discard O−rings, back−up seals and
pressure seals from pump.
IMPORTANT: Make sure to not damage the seal
bores when removing the seal from the front cover
and rear flange.
11. Carefully remove retaining ring and shaft seal from
both the front cover and rear flange. Discard seals.
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.
30):
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.
Workman HDX Auto
1
3
1. Gear shaft
2. Gear teeth
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. 28)
NOTE: When assembling the pump, check the marker
line on each part to make sure the pump components are
properly aligned during assembly (Fig. 29).
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 hy-
draulic oil.
2. Install new seal into front cover and rear flange:
A. Press shaft seal into seal bore until it reaches the
bottom of the bore.
B. Install retaining ring into the groove of the cover.
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.
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2
Figure 30
3. Gear face edge
Hydraulic System