Toro Greensmaster 3120 Service Manual page 144

Removing the Mower Manifold
Installing the Mow Control Manifold
Hydraulic System: Service and Repairs
1. Park the machine on a level surface. Lower the cutting units, stop the engine,
engage the parking brake and remove the key from the ignition switch.
2. Read and adhere to the information provided in
Removing and Installing the Hydraulic System Components (page
3. Label all hydraulic connections and electrical connections for proper
assembly.
4. Disconnect the wire harness connectors from the manifold solenoid coils.
For machines with backlap, disconnect the wire harness connector from the
backlap switch.
5. Disconnect the hydraulic hose and tube assemblies from the hydraulic
fittings. Allow the hoses and tubes to drain into a suitable container. Cap and
plug the hydraulic hoses, tubes and fittings to prevent system contaminations.
6. Remove the two (2) cap screws from under the hydraulic manifold and
remove manifold assembly from the machine.
A flow control orifice is located beneath the fitting in manifold
port L1A. If this fitting is removed from the manifold, make sure to
remove orifice and label its position for assembly purposes. When
installing the orifice in the manifold, make sure that the orifice is flat
in the base of the port. Manifold damage is possible if the orifice is
cocked in the port.
7. If necessary, mark the hydraulic fitting location and orientation to allow
for correct assembly and remove the hydraulic fittings from the manifold.
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 the manifold hydraulic fittings. Install the
fittings making sure that the fitting location and orientation is as noted during
removal. Tighten fittings as specified; refer to
(SAE Straight Thread O-Ring Fittings) (page
2. Position the manifold assembly to the machine frame and secure the
manifold to the frame with two (2) cap screws.
3. Remove the plugs and the caps from the hydraulic hoses, tubes and fittings.
Using the labels placed during manifold removal, connect the hydraulic hoses
or tubes to the manifold fittings. Tighten the connections as specified; refer to
Installing Hydraulic Hoses and Tubes (O-Ring Face Seal) (page
4. Connect the wire harness connectors to the manifold solenoid coils. For
machines with backlap, connect the wire harness connector to the backlap
switch.
5. Charge the hydraulic system; refer to
4–79).
IMPORTANT
Charging the Hydraulic System (page
Page 4–98
General Precautions for
4–71).
Installing the Hydraulic Fittings
4–10).
4–8).
Greensmaster 3120
17230SL Rev C