Toro Groundmaster Series Service Manual page 162

Removing the Gear Pump (continued)
Installing the Gear Pump
Hydraulic System: Service and Repairs
A case drain exists in the traction (piston) pump and a suction port is near
the input shaft of the gear pump. When the gear pump is removed from the
traction pump, install plugs into the case drain and suction ports to prevent
the pumps from draining.
g213694
1. Traction pump (P1) case drain
9. If necessary, remove the hydraulic fittings from the pump. Record the
locations and orientations of the fittings for assembly purposes.
10. Remove and discard all the O-rings from the hydraulic hoses, tubes, and
fittings that were disconnected or removed.
Refer to Figure 53 for this procedure.
1. Lubricate new O-rings and place them onto the fittings. If previously removed,
install the fittings into the pump ports; refer to
(SAE Straight Thread O-Ring Fittings) (page
A case drain exists in the piston (traction) pump and a suction port
is near the input shaft of the gear pump
pump is installed, ensure that any plugs placed in either of these
ports are removed. Failure to remove the plugs will cause excessive
pressure in the piston pump and damage the seals. Also, before
securing the gear pump to piston pump, fill the piston pump housing
with clean hydraulic fluid through case drain hole.
2. Apply clean petroleum jelly or light grease to a new O-ring (item 1
and position the O-ring onto the gear pump flange.
3. Align the gear pump shaft and slide the gear pump into the traction pump
coupler.
4. Secure the gear pump to the piston pump with the previously removed
fasteners.
5. Remove the caps and plugs from the hydraulic fittings and hydraulic lines
then install the hydraulic lines to the piston pump and the gear pump; refer to
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal Fitting) (page
Tighten the gear pump suction hose clamp to 10 N∙m (90 in-lb).
6. Prime the hydraulic pump; refer to
Figure 54
2. Gear pump (P2) suction port
IMPORTANT
Priming the Hydraulic Pumps (page
Page 5–76
Installing the Hydraulic Fittings
5–9).
(Figure 54). Before the gear
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
Figure 53)
5–7).
5–60).