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Groundsmaster 4500--D/4700--D Hydraulic SystemPage 4 -- 105
5. Remove motor from the vise. Turn motor so that the
shaft end is facing down. Remove cap screws.
6. Separate rear co ver from body. Lift rear cover from
motor.
7. Carefully remove body. Lift body straight up to re-
move. Make sure the rear wear plate remains on the
drive and idler gear shafts. Remove and discard O--
rings from the body. Locate and retrieve dowel pins.
IMPORTANT: Note position of the open and closed
side of the wear plates before removing. Also, iden-
tify wear plates (front and rear) with a marker for
proper assembly.
IMPORTANT: Mark the relative positions of the gear
teeth and the wear plates so they can be reassem-
bled in the same position. Donot touch the gear sur-
faces as residue on hands may be corrosive to gear
finish.
8. Carefully remove rear wear plate, idler g ear, drive
gear and front wear plate from the front flange.
9. Remove and discard back--up gaskets and pressure
seals from wear plates.
10.Turn front flange over, with seal side up.
IMPORTANT: Make sure to not damage the front
flange counter bore when removing the seals from
the front flange.
11.Carefully remove dust seals, retaining ring, flange
washer and shaft seal from the front flange (Fig. 88).
Discard r emoved seals.
Inspection
1. Remove any nicks and burrs from all parts with
emery cloth.
CAUTION
Use goggles or other appropriate eye protection
when using compressed air for drying p arts.
2. Clean all parts with solvent. Dry all parts with com-
pressed air.
3. Inspect drive gears and idler gears for the following
(Fig. 89):
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
andwear.Anybrokenornickedgearteethmustbe
replaced.
C. Inspect gear face edge for sharpness. Sharp
edges of gears will mill into wear plates and, thus,
must be replaced.
4. Inspect wear plates for the following:
A. Bearing areas should not have excessive wear or
scoring.
B. Face of wear plates that are in contact with gears
should be free of wear, roughness or scoring.
C. Thickness of wear plates should be equal.
5. Inspect front flange and rear cover for damage or
wear.
1. Outer dust seal
2. Inner dust seal
3. Retaining ring
4. Flange washer
5. Shaft seal
Figure 88
1
2
3
4
5
1. Gear shaft spline
2. Gear shaft
3. Gear teeth
4. Gear face edge
Figure 89
3
4
1
2
Hydraulic
System