Bush Hog Commercial Series manual START-UP Maintenance, Hydrostatic Fluid, START-UP Procedure

WARNING

HIGH PRESSURE HYDRAULIC FLUID LEAKS CAN PENETRATE SKIN CAUSING SERIOUS INJURY AND GANGRENE.

INJECTED FLUID MUST BE SURGICALLY REMOVED WITHIN A FEW HOURS BY A DOC- TOR FAMILIAR WITH THIS TYPE OF INJURY.

TO AVOID SERIOUS INJURY FROM

PRESSURE LEAKS:

●USE CARDBOARD AND NOT HANDS TO SEARCH FOR LEAKS.

●RELIEVE HYDRAULIC PRESSURE BEFORE WORKING ON SYSTEM.

●CHECK HYDRAULIC HOSES, LINES, AND CONNECTIONS FOR TIGHTNESS AND GOOD CONDITION BEFORE APPLYING SYSTEM PRESSURE.

START-UP MAINTENANCE

HYDROSTATIC FLUID

Bush Hog recommends the use of 20W50 motor oil in the hydrostatic reservoir.

START-UP PROCEDURE

WARNING

TO AVOID INJURY FROM EQUIPMENT GROUND

TRAVEL AND MOVEMENT DURING

START-UP PROCEDURE: DO NOT START OR JOG ENGINE UNTIL:

●PUMP IS IN NEUTRAL POSITION

●DRIVE WHEELS ARE RAISED OFF THE GROUND.

●EQUIPMENT IS SECURELY BLOCKED-UP TO KEEP WHEELS FROM GROUND CONTACT.

●PTO AND OTHER WORK FUNCTIONS ARE DISCONNECTED.

●KEEP HANDS, HAIR AND CLOTHING AWAY FROM ROTATING BLADES.

The following start-up procedure should always be followed when starting a new installation or when restarting and installation in which the pump or motor has been removed from the system.

Prior to starting the pump, make certain all system components (reservoir, fittings, etc.) are clean prior to filling with fluid.

Fill the reservoir with recommended fluid which should be filtered prior to entering the reservoir.

Start the engine and idle at the lowest possible RPM.

With the bypass valve closed, slowly move the dis- placement control in both the forward and reverse directions. As air is purged from the unit, the oil level in the reservoir will drop and bubbles may appear in the fluid. Refill the reservoir as necessary.

Place the steering levers in the neutral position and

open the bypass valve. Slowly move the steering levers in both the forward and reverse directions to purge the air from the closed circuit.

Close the bypass valve and run the unit in both direc- tions for several minutes until any remaining air is purged from the unit. Refill the reservoir as necessary.

Stop the engine, check for and correct any fluid leaks, and check the reservoir level. Add fluid if necessary. The transmission is now ready for operation.

HYDROSTATIC MAINTENANCE

Check the reservoir daily for proper fluid level. Oil level should be to the bottom of the slot on the reser- voir baffle.

The pump and motor units normally do not require regular fluid changes. The system filter should be changed after the first 50 hours of break-in, then every 250 hours thereafter. The fluid and filter should be changed and the system cleaned if the fluid becomes contaminated with foreign matter (water, dirt, etc.).

PARKING BRAKE ADJUSTMENT

Check to make sure brake is adjusted properly.

Force on the brake handle to lock the brake in place should be 30 pounds. To adjust the brake tension, shorten or lengthen the horizontal brake linkage.

If further adjustment is needed at each individual wheel brake:

1.Engage the brake lever (lever up).

2.Remove the wheel from the side needing adjusting.

3.With the brake engaged the spring length should be 3-1/2” (measured to the inside of the spring loops).

4.If the spring length is different, shorten or lengthen the vertical brake linkage.

5.Reinstall the wheel and torque the lug nuts.

Pump Drive Belt Tension Adjustment

1.Stop engine and remove key.

2.The pump drive belt tension is adjusted through a spring loaded idler pulley.

3.Adjust the eye bolt so the spring length is 6” (mea- sured to the inside of the spring loops).

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