Toro Groundsmaster 7210 Service Manual page 190

Removing the Polar Trac Lift Cylinder
Installing the Polar Trac Lift Cylinder
Hydraulic System: Service and Repairs
Before disconnecting or doing any work on the hydraulic system,
release all the pressure in the system; refer to
from the Hydraulic System (page
1. Park the machine on a level surface, lower the implement, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Clean the hydraulic hose ends and fittings on the lift cylinder to prevent
contaminants from entering into the hydraulic system.
3. For assembly purposes, label all the hydraulic hoses and fittings.
4. Disconnect the hydraulic hoses that are connected to the hydraulic fittings on
the lift cylinder.
5. Install clean caps or plugs in the hose openings to prevent system
contamination.
6. Remove the locknut (item 32 in
that attach the cylinder head of the lift cylinder to the carrier frame.
7. Remove the locknut (item 32 in
that attach the lift cylinder rod end to the lift arm assembly.
8. Remove the lift cylinder from the machine.
9. If necessary, remove the hydraulic fittings from the lift cylinder. Note the
orientation of the fittings for assembly purposes.
10. Remove and discard the O-rings from fittings.
1. If the hydraulic fittings were removed from the lift cylinder, lubricate and
install new O-rings onto the fittings. Install the fittings into the lift cylinder
ports; refer to Installing the Hydraulic Fittings (SAE Straight Thread O-Ring
Fitting into the Component Port) (page
during removal to orientate the fittings.
2. Position the lift cylinder to the machine.
3. Attach the cylinder head of the cylinder to the carrier frame with the pivot
pin, flange-head screw, and locknut.
4. Attach the cylinder rod end to the lift arm assembly with the pivot pin,
flange-head screw, and locknut.
5. Remove the caps or plugs that were installed to the hydraulic hoses during
the removal process.
6. Use the labels that you attached during the lift cylinder removal to correctly
connect the hydraulic hoses to the lift cylinder fittings; refer to
Hydraulic Hose and Tube (O-Ring Face Seal Fitting) (page
7. Lubricate the grease fittings on the cylinder pivot pins.
8. Ensure that the hydraulic tank is full. Add correct quantity of fluid if necessary;
refer to the Traction Unit Operator's Manual.
WARNING
4–11).
Figure 130), flange-head screw, and pivot pin
Figure 130), flange-head screw, and pivot pin
4–7). Use the notes that you recorded
Page 4–130
Releasing Pressure
Installing the
4–5).
Groundsmaster 7210
16222SL Rev C