Toro Multi Pro 1750 Service Manual page 79

6. Remove front cover from the body, then remove rear
cover. Locate and remove dowel pins from body.
IMPORTANT: Mark the relative positions of the gear
teeth and thrust plates so they can be assembled in
the same position. Do not touch the gear surfaces
as residue on hands may be corrosive to gear finish.
7. Place pump on its side and carefully push on the rear
thrust plate to remove thrust plates and gear set from the
pump body.
NOTE: Pressure seals and back−up seals fit in grooves
machined into thrust plates. O−rings fit in grooves ma-
chined in the pump body.
8. Carefully remove and discard O−rings, pressure
seals and back−up seals from pump body and thrust
plates. Do not cause any damage to the machined
grooves during the removal process.
IMPORTANT: Make sure to not damage the counter
bore when removing the shaft seals and retaining
ring from the front cover.
9. Carefully remove shaft seals and retaining ring from
the front cover (Fig. 25). Note orientation of seal lips dur-
ing removal. Discard removed seals.
10.If necessary, remove implement relief valve from
rear cover. Remove and discard sealing washers from
relief valve.
Inspecting the Hydraulic Pump (Fig. 26)
CAUTION
Use eye protection such as goggles when using
compressed air.
1. Clean all pump parts with solvent. Dry all parts with
compressed air.
2. Inspect drive shaft, driven gear and thrust plates for
the following. If damage is found, pump replacement is
necessary.
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.
Multi Pro 1750
C. Inspect gear face edge for sharpness. Sharp
edges of gears will mill into thrust plates and, thus,
must be replaced.
D. Bearing areas of thrust plates should not have ex-
cessive wear or scoring.
E. Face of thrust plates that are in contact with gears
should be free of wear, roughness or scoring.
3. Inspect front and rear covers for damage or wear.
Replace pump if covers are damaged or worn.
1
1. Drive gear shaft
2. Outer shaft seal
1
1. Drive shaft
2. Gear shaft
3. Gear teeth
Page 4 − 31
3
2
4
Figure 25
3. Retaining ring
4. Inner shaft seal
3
2
4
Figure 26
4. Gear face edge
5. Thrust plate
Hydraulic System
5