Bleeding The Hydraulic System - Toro 74410 Operator's Manual

With 52in 7-gauge side discharge mower

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Operator's manual (56 pages)

Table Of Contents

Table of Contents

Warning

Hydraulic fluid escaping under pressure can

penetrate skin and cause injury.

• If hydraulic fluid is injected into the skin, it

must be surgically removed within a few hours

by a doctor familiar with this type of injury;

otherwise, gangrene may result.

• Keep your body and hands away from pin hole

leaks or nozzles that eject high-pressure

hydraulic fluid.

• Use cardboard or paper to find hydraulic leaks.

• Safely relieve all pressure in the hydraulic

system before performing any work on the

hydraulic system.

• Ensure that all hydraulic fluid hoses and lines

are in good condition and all hydraulic

connections and fittings are tight before

applying pressure to the hydraulic system.

Replacing the Hydraulic Filter

Change the hydraulic filter:

• After the first 8 operating hours

• After every 200 operating hours

Use a summer filter above 32°F (0°C)

Use a winter filter below 32°F (0°C)

1. Disengage the PTO, move the motion control levers to

the neutral locked position, and set the parking brake.

2. Stop the engine, remove the key, and wait for all

moving parts to stop before leaving the operating

position.

Important

Do not substitute an automotive oil filter for

a hydraulic filter; this can severely damage the hydraulic

system.

3. Place a drain pan under the filter, remove the old filter,

and wipe the filter adapter gasket surface clean

(Fig. 43).

Figure 43

1. Hydraulic filter

4. Apply a thin coat hydro fluid to the rubber gasket on the

replacement filter (Fig. 44).

1. Hydraulic filter

2. Gasket

5. Install the replacement hydraulic filter onto the filter

adapter, but do not tighten.

6. Fill the hydraulic tank with hydraulic fluid until the

fluid overflows the filter

7. Turn the oil filter clockwise until the rubber gasket

contacts the filter adapter, then tighten the filter an

additional 1/2 turn (Fig. 44).

8. Clean up any spilled fluid.

9. Add fluid to the cold level of the baffle in the hydraulic

tank.

10. Start the engine and let it run for about 2 minutes to

purge air from the system. Stop the engine and check

for leaks.

Note: If one or both wheels will not drive, refer

Bleeding Hydraulic System on page 35.

11. Check the fluid level while the fluid is warm.

Note: The fluid should be between cold and hot.

12. If required, add fluid to the hydraulic tank. Do not

overfill.