Toro 30821 Service Manual page 120

9. Install rear wear plate with pressure seal side up and
open side of the pressure seal pointing to the inlet side
of the motor.
10.Apply a light coating of petroleum jelly to new
O- rings and O- ring grooves in the body. Install new
O- rings to the body.
11. Install locating dowels in body. Align marker line on
the body and front plate.
IMPORTANT: Do not dislodge seals during installa-
tion.
12.Gently slide the body onto the assembly. Firm hand
pressure should be sufficient to engage the dowels.
13.Check to make sure that the surface of the rear wear
plate is slightly below the face of the body. If the wear
plate is not below the body, check assembly for a shifted
pressure seal, backup seal, or O- ring. Correct before
proceeding.
14.Apply a light coating of petroleum jelly to the exposed
side of the back plate.
15.Place back plate on assembly using marker line for
proper location. Firm hand pressure should be sufficient
to engage the dowels.
16.Install the four screws and hand tighten.
IMPORTANT: Avoid using excessive clamping
pressure on the motor housing to prevent distorting
the housing.
17.Place mounting flange of the motor into a vise and al-
ternately torque the screws from 38 to 43 ft- lb (51 to 58
N- m).
18.Remove motor from vise.
19.Place a small amount of clean hydraulic oil in the inlet
of the motor and rotate the drive shaft away from the inlet
one revolution. If any binding is noted, disassemble the
pump and check for assembly problems.
Hydraulic System (Rev. G)
Relief Valve Service
IMPORTANT: Do not remove the relief valve as-
sembly unless testing shows it to be faulty. The re-
lief valve assembly must be replaced as a complete
unit.
1. When removing or installing the relief valve, motor
should be removed from deck and positioned horizon-
tally with the relief valve pointed down (Fig. 89). This
process will prevent relief valve from falling into motor
passages.
2. Remove plug, O- ring, spring, and relief valve from
the backplate. Do not attempt to remove the seat from
the back plate.
3. Clean and inspect removed parts. Visually inspect
relief valve bore and seat in the back plate.
4. Apply hydraulic oil to components. Replace the relief
valve assembly: install relief valve, spring, O- ring, and
plug into the backplate. Tighten plug.
RELIEF VALVE KIT
Page 4 - 80
Figure 89
Groundsmaster 3500- D