IMPORTANT: Note position of the open and closed
side of the wear plates before removing. Also, iden-
tify wear plates (front and rear) for proper re-
assembly. Do not scribe wear plates.
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.
wear.
Inspect front plate and back plate for damage or
8.
gear and front wear plate from the front plate.
Carefully remove rear wear plate, idler gear, drive
9.
Remove and discard back--upgaskets and pressure
seals from wear plates.
3
IMPORTANT: Make sure not to damage the front
plate counter bore when removing the components
from the front plate.
2
10.Turn
front plate over, with seal side up and carefully
remove the seal, retaining ring, washer and shaft seal.
Discard seals.
1
11.
If necessary, remove anti--cavitation and relief
valves from back plate.
4
Inspection
Figure 42
1.
2.
Gear shaft spline
Gear shaft
3.
4.
Gear teeth
Gear face edge
1.
Remove any nicks and burrs from all parts with
emery cloth.
Assembly (Fig. 40)
CAUTION
NOTE: When assembling the motor, check the marker
lineoneachparttomakesurethecomponents areprop-
erly aligned during assembly (Fig. 41).
Use eye protection such as goggles when using
compressed air.
1.
Lubricate new o--rings, pressure seals, back--up
gasketsandwearplategrooves withathincoatofpetro-
leum jelly. Lubricate all other internal parts freely with
clean hydraulic oil.
2.
Clean all parts with solvent. Dry all parts with com-
pressed air.
2.
pressedintoplaceuntilitreachesthebottomofthebore.
Install new shaft seal in front plate. Seal should be
3.
(Fig. 42):
Inspect drive gears and idler gears for the following
3.
of the front plate. Press seal into front plate.
Install washer and then retaining ring into the groove
A. Drivegearshaftsplineshouldbefreeoftwistedor
broken teeth.
4.
5.
wear plates. Follow by carefully placing the pressure
seals to the backup gaskets and wear plate.
Place front plate, seal side down, on a flat surface.
Install the backup gaskets into the grooves in the
B. 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.
C. Gear teeth should be free of excessive scoring
and wear. Any broken or nicked gear teeth must be
replaced.
6.
side of the front plate.
Applyalightcoatingofpetroleumjellytotheexposed
7.
Lubricatethedrivegearshaftwithcleanhydraulicoil.
D. Inspect gear face edge for sharpness. Sharp
edges of gears will mill into wear plates and, thus,
must be replaced.
Insert the drive end of the drive shaft through the front
wear plate with the pressure seal side down and the
open side of the pressure seal pointing to the inlet side
of the motor. Carefully install drive shaft into front plate.
4.
Inspect wear plates for the following:
A. Bearingareasshouldnothaveexcessive wearor
scoring.
Groundsmaster 3505--D
Page 4 -- 65
Hydraulic System
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