Service Manual

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Mid-Size Walk Behind Service Manual 5 - 3

HYDRAULIC DRIVE SYSTEMS

Servicing the Hydraulic System

Replacing the Hydraulic Filter

Change the hydraulic filter:

• After the first 8 operating hours.

• After every 200 operating hours.

1. Disengage the PTO, turn the ignition key to off,

and remove the key.

2. Wait for all moving parts to stop before leaving the

operating position and then chock or block tires.

Do not substitute an automotive oil filter

or severe hydraulic system damage may result.

3. Remove hydraulic reservoir cap and temporarily

cover opening with a plastic bag and rubber band

to prevent all hydro fluid from draining out.

4. Locate filter under engine base and place drain

pan under filter (Figure 74).

5. Remove the old filter and wipe the filter adapter

gasket surface clean (Figure 74).

Figure 74

m-1256

6. Apply a thin coat of hydro fluid to the rubber

gasket on the replacement filter.

7. Install replacement hydraulic filter onto the filter

adapter. Do not tighten.

8. Remove plastic bag from reservoir opening and

allow filter to fill with hydro fluid.

9. When fluid overflows filter, turn the oil filter

clockwise until the rubber gasket contacts the filter

adapter. Then tighten the filter an additional 1/2

turn (Figure 74).

10. Clean up any spilled fluid.

11. Add Mobil 1 15W-50 synthetic motor oil or

equivalent synthetic oil to approximately 1/4 in.

(6mm) below the top of reservoir baffle.

Use oil specified or equivalent. Other

fluids could cause system damage.

12. Start engine and let run for about two minutes to

purge air from the system. Stop the engine and

check for leaks. If one or both wheels will not

drive, refer to "Bleeding Hydraulic System

(Floating Deck Models)" on page 5 - 4.

13. Recheck level and add fluid, if required. Do not

overfill.

Checking the Hydraulic Fluid

Check the hydraulic fluid level:

• Before engine is first started.

• After first

8 operating hours.

• After 40 operating hours.

Fluid Type: Mobil 1 15W-50 synthetic motor oil or

equivalent synthetic oil.

Use oil specified or equivalent. Other

fluids could cause system damage.

Hydraulic System Oil Capacity: 67 oz. (2.0 l).

1. Position machine on a level surface, stop the

engine and chock or block tires.

(1) Hydraulic filter

(2) Gasket

(3) Adapter

Important