Toro Groundsmaster 7210 Service Manual page 120

Flushing the Hydraulic System (continued)
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
2. Park machine on a level surface, lower the cutting deck (or implement), shut
off the engine, set the parking brake, and remove the key from the key switch.
Note: Ensure that you clean all the hydraulic connections that are
disconnected for draining.
3. Drain the hydraulic fluid from the hydraulic tank and transmission.
4. Drain the complete hydraulic system. Drain all the hoses, tubes, and
components while the system is warm.
5. Remove and replace the hydraulic-fluid filter.
6. Inspect and clean the hydraulic-fluid tank; refer to
Tank (page 4–64).
Follow all local codes and regulations when recycling or disposing
the hydraulic fluid and filters.
7. Connect all the hydraulic hoses, tubes, and components that were
disconnected while draining the system; refer to
and Tube (O-Ring Face Seal Fitting) (page
Using other hydraulic fluids could damage the hydraulic system.
Use the hydraulic fluids that are specified in the Traction Unit
Operator's Manual.
8. Fill the hydraulic tank with the correct quantity of new hydraulic fluid.
9. Prime the hydraulic pumps; refer to
4–58).
10. Start the engine and operate it at low-idle speed (1,400 rpm) for a minimum
of 2 minutes. Increase the engine speed to high idle (3,000 rpm) for a
minimum of 1 minute under no load.
11. Raise and lower the cutting deck (or implement) several times.
12. Shut off the engine and check for hydraulic-fluid leaks.
Note: Check the hydraulic-fluid level in the hydraulic tank and add correct
quantity of fluid if necessary; refer to the Traction Unit Operator's Manual.
13. Operate the machine for 2 hours under normal operating conditions.
14. Check the condition of hydraulic fluid. If new fluid shows any signs of
contamination, repeat steps
15. Assume the normal operation and follow the recommended maintenance
intervals.
WARNING
4–11).
IMPORTANT
IMPORTANT
Priming the Hydraulic Pumps (page
1 through 13 again until the fluid is clean.
Page 4–60
Releasing Pressure
Inspecting the Hydraulic
Installing the Hydraulic Hose
4–5).
Groundsmaster 7210
16222SL Rev C