Toro Groundmaster Series Service Manual page 167

Assembling the Gear Pump (continued)
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
3. Place the front flange, seal side down, on a flat surface.
4. Assemble the gear pump as follows:
A. Install the pressure seals, flat side outward, into the grooves in the
thrust plates. Follow by carefully placing the uni-rings, flat side outward,
between the pressure seals and the grooves in the thrust plate.
B. Apply a light coating of petroleum jelly to the exposed side of the front
flange.
C. Lubricate the drive shaft/gear with clean hydraulic oil. Insert the drive end
of the drive shaft through the thrust plate with the pressure seal side
down and the open side of the pressure seal pointing to the inlet side of
the pump. Fit the drive shaft/gear into the front cover.
D. Lubricate the idler shaft/gear with clean hydraulic oil. Align the gear teeth
position markings made during disassembly and install the idler gear
shaft into the front thrust plate and front cover. Apply a light coating of
clean hydraulic oil to the gear faces.
E. Install the rear thrust plate with the pressure seal side up and the open
side of the pressure seal pointing to the inlet side of the pump.
F. Install the dowel pins in the body.
G. Apply a light coating of petroleum jelly to the new body seals and body
seal grooves in the body. Install the new body seals into the body.
Do not dislodge the seals during installation.
H. Align the marker lines and slide the body over the gear assembly.
5. Install the dowel pins in the flange.
6. Align the marker lines and install the flange over the shaft ends.
7. Install dowel pins in rear cover.
8. Align the marker lines and slide the rear cover over the shaft ends.
9. Install the 4 cap screws with washers and hand tighten.
10. Place the front cover of the pump into a vise with soft jaws and alternately
tighten the cap screws to 45 N∙m (33 ft-lb).
11. Place a small amount of clean hydraulic oil in the pump inlet and rotate the
drive shaft clockwise one revolution. If any binding is noted, disassemble the
pump and check for assembly problems.
IMPORTANT
Page 5–81 Hydraulic System: Service and Repairs