Toro Flush Hydraulic System, Systems, Sand Pro 2020/3020/5020, Page 4, Hydraulic System Rev. A

Flush Hydraulic System

IMPORTANT: Flush hydraulic system any time there is a severe component failure or the system is contaminated (oil appears milky or black or con- tains metal particles).

IMPORTANT: Flush hydraulic system when chang- Ing from petroleum base hydraulic fluid. Operate machine under normal operating conditions for at least four (4) hours before draining.

1.Park machine on a level surface. Lower attach- ments, stop engine, and engage parking.

CAUTION

Operate all hydraulic controls to relieve system pressure and avoid injury from pressurized hy- draulic oil. Controls must be operated with the ignition switch in OFF. Remove key from the igni- tion switch.

IMPORTANT: Make sure to clean around any hy- draulic connections that will be disconnected for draining.

2.Drain hydraulic tank (see Hydraulic Tank Removal).

3.Make sure lift cylinder, lift valve, hydrostat, oil cool- er, wheel motors, hoses, and tube lines are drained into a suitable container while the system is warm.

4.Remove oil filter and drain into a suitable container. Discard filter (see Change Hydraulic System Fluid and Filter).

5.Inspect and clean tank (see Hydraulic Tank Inspec- tion).

6.Install new oil filter and drain into a suitable contain- er. Discard filter (see Change Hydraulic System Fluid and Filter).

NOTE: Use only hydraulic fluids (including biodegrad- able) specified in Checking Hydraulic System Fluid. Other fluids may cause system damage.

7.Reconnect all hydraulic hoses, lines, and compo- nents that were disconnected prior to draining.

8.Fill hydraulic tank with new hydraulic fluid (see Change Hydraulic System Fluid and Filter).

9.Disconnect both spark plug leads from spark plugs.

10.Turn ignition key switch; engage starter for 10 se- conds to the prime hydrostat. Repeat this step again.

11.Connect both spark plug leads to spark plugs.

12.Start engine and let it idle at low speed (1750 + 50 RPM) for a minimum 2 minutes. Increase engine speed to high idle (3150 + 50 RPM) for minimum of 1 minute under no load.

13.Raise and lower attachments several times.

14.Shut off engine and check for hydraulic oil leaks. Check oil level in hydraulic tank and add correct oil if necessary.

15.Operate the machine for 2 hours under normal oper- ating conditions.

16.Check condition of hydraulic oil. If the new fluid shows any signs of contamination, or if you are changing to biodegradable fluid, repeat steps 1 through 16 again.

17.Assume normal operation and follow recom- mended maintenance intervals.

Hydraulic Systems

Sand Pro 2020/3020/5020 Page 4 – 47 Hydraulic System (Rev. A)