Bush Hog Estate Series manual Purging Procedures, Parking Brake Adjustment

Models: Estate Series

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PURGING PROCEDURES

Fill Port - Insert rod through this port to check fluid level.

Void Air Space - 1-78”

Correct Fluid Level - 4-1/4”

IMPORTANT

When tightening the filter insure proper torque value of 20 - 50 in. lbs. is applied. Filter is plas- tic. Excessive torque will damage filter.

Due to the effects air has on eficiency in the hydro- static drive applications, it is critical that it be purged from the system.

These purge procedures should be implemented any time a hydrostatic system has been opened to facilitate maintenance or any additional oil has been added to the system.

Air creates inefficiency because its compression and expansion rate is higher than that of the oil normally approved for use in hydrostatic drive systems.

The resulting symptoms in hydrostatic systems may be:

!.Noisy operation.

2.Lack of power or drive after short term operation.

3.High operation temperature and excessive expan- sion of oil.

Before starting, make sure the transaxle/ transmis- sion is at the proper oil level. If it is not, fill to the specifications outlined above.

PURGING PROCEDURES

The following procedure should be performed with the vehicle wheels off the ground, then repeated under normal operating conditions.

1.With the bypass valve open and the engine run- ning, slowly move the directional control in both for- ward and reverse directions 5 or 6 times. As air is purged from the unit, the oil level will drop.

2.With the bypass valve closed and the engine running, slowly move the directional control in both forward and reverse directions (5 to 6 times). Check

the oil level, and add oil as required after stopping engine.

3.It may be necessary to repeat Steps 1 and 2 until all the air is completely purged from the system. When the transaxle moves forward and reverse at normal speed, purging is complete.

PARKING BRAKE ADJUSTMENT

The parking brake has been set correctly from the factory. Occasionally check the parking brakes and adjustment using the following method:

1.Position the control levers in the neutral position.

2.Disengage the hydrostatic transaxle by pulling out and locking the bypass levers.

3.Move the parking brake lever to the brake position.

4.The brake pawl should now be activated and engaging the hydrostatic components brake gear.

5.Move the parking brake lever down to disen- gage the brake. Standing behind the unit, the mower should be able to be pushed around freely.

6.If the brakes do not operate correctly, the cable must be adjusted. To adjust the brake cables, loosen the two locknuts on the spring end of the cables, just to the inside of each of the rear tires. Adjust the cables up or down the thread- ed adjustment until the brake pawl is fully engaging the brake gear when the brake is engaged and the spring is slightly extended and the brake pawl is fully disengaging the brake gear when the brake lever is disengaged.

7.Tighten the locknuts securely.

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Bush Hog Estate Series manual Purging Procedures, Parking Brake Adjustment