Toro Greensmaster 3120 Service Manual page 128

Removing the Gear Pump
Installing the Gear Pump
Hydraulic System: Service and Repairs
1. Park the machine on a level surface, engage parking brake, lower cutting
units and stop engine. Remove key from the ignition switch.
2. Read and adhere to the information provided in
Removing and Installing the Hydraulic System Components (page
3. Pinch the pump inlet hose closed with a clamp to prevent draining the
hydraulic tank prematurely.
4. Remove the inlet hose from the gear pump and drain the hydraulic tank into
a suitable container.
5. Disconnect the hydraulic hoses from the gear pump. Allow hoses to drain into
a suitable container. Plug hoses and cap fittings to prevent contamination.
Follow all local codes and regulations when recycling or disposing
the hydraulic fluid and filters.
6. Support the gear pump to prevent it from falling and remove both socket head
screws and flat washers. Separate the gear pump from the piston pump.
7. Remove and discard the O-ring from between the gear pump and piston
pump.
8. If necessary, mark the hydraulic fitting location and orientation to allow for
correct assembly and remove the hydraulic fittings from the gear pump.
Remove and discard all O-rings from the hydraulic fittings.
Note: Inspect threads and sealing surfaces of hydraulic fittings and hydraulic
hose or tube connectors prior to installation. Replace any damaged or worn
fittings, hoses or tubes.
1. Lubricate and fit new O-rings onto gear pump hydraulic fittings. Install fittings
into pump openings making sure that fitting location and orientation is as
noted during removal. Tighten fittings as specified; refer to
Hydraulic Fittings (SAE Straight Thread O-Ring Fittings) (page
2. Make sure traction pump and gear pump mounting and O-ring sealing
surfaces are clean.
3. Lubricate and place new O-ring on the gear pump (item
4. Position gear pump with inlet from hydraulic tank upward, secure with two (2)
socket head screws and flat washers.
5. Remove the plugs and the caps from hydraulic hoses and fittings and using
labels placed during gear pump removal, connect the hydraulic hoses to
the gear pump fittings. Tighten connections as specified; refer to
Hydraulic Hoses and Tubes (O-Ring Face Seal) (page
6. Install pump inlet hose to the gear pump and secure with hose clamp.
7. Prime the gear pump and charge the hydraulic system; refer to
Hydraulic Pumps (page 4–78)
IMPORTANT
Page 4–82
General Precautions for
4–71).
Installing the
4–10).
2 in Figure 52).
Installing
4–8).
Priming the
Greensmaster 3120
17230SL Rev C