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Groundsmaster 4000--D Hydraulic SystemPage 4 -- 109
8. Remove and discard back--up gaskets and pressure
seals from wear plates.
9. Turn front flange over, with seal side up.
IMPORTANT: Make sure not to damage the front
flange counter bore when removing the seals from
the front flange.
10.Carefully remove dust seal, retaining ring, flange
washer and shaft seal from the front flange (Fig. 75).
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 gears and idler gears for the following
(Fig. 76):
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 wear plates for the following:
A. Bearingareasshouldnothave 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. Dust seal
2. Retaining ring
3. Flange washer
4. Shaft seal
Figure 75
1
2
3
4
1. Gear shaft spline
2. Gear shaft
3. Gear teeth
4. Gear face edge
Figure 76
3
4
1
2
Assembly (Fig. 73)
NOTE: When assembling the motor, check the marker
line on each part to make sure the parts are properly
aligned during assembly.
1. LubricateO--rings, pressureseals, back--up gaskets
and wear plate grooves with a thin coat of petroleum jel-
ly. Lubricate all other internal parts freely with clean hy-
draulic oil.
2. Install new seals into front flange (Fig. 75):
A. Press shaft seal into front flange until it reaches
the bottom of the bore.
B. Install flange washer into front flange and then
install retaining ring into the groove of the front
flange.
C. Install new dust seal into front flange.
3. Place front flange, seal side down, on a flat surface.
Hydraulic
System