Flushing the Hydraulic System

IMPORTANT: Flush the 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, such as Mobil 424, to biodegradable fluid, such as Mobil EAL 224H. Operate machine under normal operat- ing conditions for at least four (4) hours before draining.

1.Park machine on a level surface. Lower cutting units, stop engine, engage parking brake and remove key from ignition switch.

2.Clean area around filter mounting area. Remove fil- ter and drain reservoir into a suitable container. Drain hydraulic system, Make sure lift cylinders, hoses, and tube lines are drained while the system is warm. Discard filter.

3.Inspect and clean reservoir (see Inspecting Reser- voir Parts).

4.Make sure filter mounting surface is clean. Apply hydraulic oil to gasket on the new filter. Screw filter on until gasket contacts mounting plate, then tighten filter half a turn.

Note: Use biodegradable fluid, such as Mobil EAL 224H, for this step if you are changing to this type of fluid. Use only hydraulic fluids specified in Checking Hydrau- lic System Fluid (see General section of this chapter). Other fluids could cause system damage.

5.Fill hydraulic reservoir.

6.Disconnect electrical connector to the fuel stop so- lenoid to prevent engine from starting.

7.Turn ignition key switch; engage starter for ten (10) seconds to the prime pump. Repeat this step again.

8.Connect electrical connector to the fuel stop sole- noid.

9.Start engine and let it idle at low speed for a mini- mum of two (2) minutes.

10.Increase engine speed to high idle for minimum of one (1) minute under no load.

1

2

Figure 68

1.Hydraulic reservoir cap

2.Sight gauge

1

Hydraulic System

 

Figure 69

1.Hydraulic filter

11.Raise and lower cutting units several times.

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

13.Operate the machine for two (2) hours under normal operating conditions.

14.Check condition of hydraulic oil. If the flushing fluid shows any signs of contamination, or if you are changing to biodegradable fluid, repeat steps 1 through 14 again.

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

Reelmaster 2300±D/2600±D

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Hydraulic System

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Toro 2600D, 2300-D service manual Flushing the Hydraulic System

2600D, 2300-D specifications

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