Toro 3200, Service Manual

Page: 138 / 274

5. Inspect front plate, back plate, and adapter plate as
follows:
A. Inside diameter of all bushings should not ex-
ceed 0.755 inch (19.2 mm).
B. Bushings in the front plate should extend 0.126
inch (3.20 mm) from the plate surface.
C. Bushings on the wear plate side of the adapter
plate should extend 0.126 inch (3.20 mm) from the
plate surface.
D. Scoring on the face of the back plate or the back
plate side of the adapter plate should not exceed
0.0015 inch (0.038 mm)
E. The oil groove in the bushings of the front plate
should be opposite each other and in line with with
the dowel pin holes. The oil groove in the bushings
of the back plate should be about 37
_
to the pres-
sure port (Fig. 52 and 53).
Reassembly (Fig. 50)
Note: When reassembling the pump, check the scribe
marks on each part to make sure the parts are properly
aligned during reassembly.
1. Lubricate new wear O–rings, pressure seals, back–
up gaskets, and wear plates with a thin coat of petroleum
jelly. Lubricate all other internal parts freely with clean
hydraulic oil.
2. Install O–ring into the groove of the front plate.
3. Lubricate gear pockets of front body with a thin coat
of petroleum jelly. Place front body onto front plate so the
half moon port cavities face away from the front plate.
4. Install new pressure seal and back–up gasket into
both new wear plates. The flat section in the middle of
the back–up gasket must face away from the wear plate
inside the seal.
5. Install wear plate into the gear pocket with the pres-
sure seal and back–up gasket against the front plate.
Make sure mid section cut–away of the wear plate is on
the suction side of the pump.
6. Dip drive gear and front idler gear into clean hydrau-
lic oil. Install gear shafts into the front plate bushings so
that the gears set inside the gear pockets.
7. Install new O–ring into the groove of the adapter
plate on the side with the bushings below the surface.
8. Align scribe marks on the body and adapter plate.
Install adapter plate onto the body and gear shafts.
9. Install second new O–ring to the other side of the
adapter plate.
OIL GROOVE
OIL GROOVE
FRONT PLATE
Figure 52
OIL GROOVE
OIL GROOVE
BACK PLATE
Figure 53
10. Coat key lightly with petroleum jelly to hold it in
place. Install key into the slot in the drive gear shaft.
11. Align scribe marks on back body and adapter plate.
Install body onto adapter plate and drive gear shaft.
IMPORTANT: Do not dislodge seals during installa-
tion.
12. Install wear plate into the gear pocket of back body
with the pressure seal and back–up gasket against the
adapter plate. Make sure mid section cut–away of the
wear plate is on the suction side of the pump.
13. Lubricate back gear with clean hydraulic oil. Install
gear onto the drive gear shaft and key.
14. Lubricate back idler gear with clean hydraulic oil.
Install idler gear into the gear pocket of back body and
the adapter plate.
15. Install new O–ring into the groove of the back plate.
16. Align scribe marks on the back plate and body.
Install back plate onto the body and gear shafts.
17. Secure pump together with cap screws and new
washers on cap screws external of the flange cavity.
Torque cap screws in a criss–cross pattern from 25 to 28
ft–lb (3.5 to 3.9 kg–m).
Hydraulic System Page 5 – 66 Greensmaster 3200/3200–D