Toro 5020, 2020, 3020 service manual Cleaning and Inspection Fig

Removal (Fig. 87)

1.Before removing any parts from the hydraulic sys- tem, park machine on a level surface, set brake, lower attachment, and stop engine.

Cleaning and Inspection (Fig. 87)

1.Back flush oil cooler with cleaning solvent (bottom opening to top opening). After cooler is clean, make sure all solvent is drained from the cooler.

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.

2.Pivot seat up. Remove cover (8) from the midsec- tion of the machine.

3.Disconnect air hose attached to the air cleaner on the engine.

4.Remove both lock nuts (12), cap screws (15), and strip retainer (19) securing the lower part of the rubber shield (20) to the frame. Position shield away from the bottom of of the oil cooler (2).

5.Clean both 90o hydraulic fittings (5), hydraulic hose (43), and valve to cooler tube (6). Clean oil cooler (2) in the area of these fittings.

6.Label all hydraulic connections for reassembly.

7.Place a suitable container under 90o hydraulic fitting

(5) at the bottom of the oil cooler (2) to collect hydraulic oil.

8.Disconnect valve to cooler tube (6) from 90o hydrau- lic fitting (5). Allow fluid to drain from into the container.

9.Disconnect hydraulic hose (43) from 90o hydraulic fitting (5). Allow fluid to drain completely from the cooler into a suitable container.

10.Put caps or plugs on disconnected hoses and fit- tings to prevent contamination.

11.Remove both cap screws (11), spacers (16), and flat washers (17) from rubber clamps (3) and T–nuts (4).

12.Pull the oil cooler (2) from the machine.

13.Remove 90o hydraulic fittings (5) and O–rings (29) from the oil cooler (2).

CAUTION

Use eye protection such as goggles when using compressed air.

2.Dry inside of oil cooler using compressed air in the opposite direction of the oil flow (bottom opening to top opening).

3.Plug both ends of the oil cooler. Clean exterior of the cooler. Make sure fins are clear of dirt and debris.

4.The oil cooler should be free of corrosion, cracked tubes, and excessive pitting of tubes.

Installation (Fig. 87)

1.Make sure hydraulic both openings to the oil cooler are clean. Remove plugs from the cooler openings.

2.Reinstall O–rings (29) and 90o hydraulic fittings (5) to the oil cooler (2).

3.Position the oil cooler (2) to the front shield (26).

4.Secure oil cooler to the front shield (26) with both rubber clamps (3), flat washers (17), spacers (16), cap screws (11), and T–nuts (4).

5.Remove caps or plugs on disconnected hoses and fittings.

6.Reconnect valve to cooler tube (6) to 90o hydraulic fitting (5).

7.Reconnect hydraulic hose (43) to 90o hydraulic fit- ting (5).

8.Reinstall cover (8) to the midsection of the machine. Pivot seat down.

9.Fill tank with hydraulic fluid (see Check Hydraulic System Fluid and Change Hydraulic System Oil and Fil- ter).

10.Charge hydraulic system (see Charge Hydraulic System).

Hydraulic Systems

Sand Pro 2020/3020/5020 Page 4 – 73 Hydraulic System (Rev. A)