3-4 EXTERNAL LOADER AND/OR TRAC- TOR VALVE.
NOTE
When properly installed, the tractor remote valve or external valve control lever/levers will control the loader hydraulic circuits as described below. Refer to tractor Operator’s Manual for further explanation of tractor remote control lever/levers.
IMPORTANT
Contaminants in hydraulic fluid can cause valve spools to stick. BE ALERT when operating loader and follow your tractor Operator’s Manual hydraulic fluid maintenance schedule.
If your loader utilizes a loader control valve equipped with single lever control handle or tractor remote valve equipped with single lever control handle, it will function as shown in Figure
Figure
If your loader utilizes a loader mounted series con- trol valve equipped with single lever control handle, it will function as shown in Figure
Figure
3-7 NEUTRAL POSITION
The loader external valve provided by Bush Hog has a “neutral position” which prevents movement of the loader or attachment. When the control handle is manually released from the work position, the valve spool will return to the neutral position.
3-8 FLOAT POSITION
The loader external valve provided by Bush Hog has a “float position” incorporated into the lift cylinder cir- cuit which allows the loader to float. This float fea- ture is important for satisfactory operation when scraping, sweeping, leveling, or any job where it is necessary to follow the contour of the surface. To activate the float position, lower the bucket or attach- ment and push the control handle all the way for- ward into detent. The valve will stay in float detent position until the operator manually pulls the control handle out of detent position to deactivate float.
3-9 REGENERATIVE VALVE POSITION
When the handle is pushed all the way to the right, it will go past the dump detent position into the regenerative position. This position requires the operator to hold it in place. This feature enhances the performance and speed of the dump procedure.
3-10 LOAD SENSE LOADER VALVE
IMPORTANT
If your loader is equipped with a load sense type control valve it may demonstrate the following operation characteristic. Attempting to raise the boom by finely feathering the control lever may actually allow the boom to lower very slowly. To prevent this from happening, move the control lever far enough to ensure that the boom raises.
3-11 LOADER OPERATION
Before operating the loader, fully raise and lower the boom three or four times. Then raise the loader bucket approximately four (4) feet above the ground and cycle the bucket two or three times. Lower the bucket or attachment to the ground. Check the trac- tor hydraulic fluid level and fill as required. Refer to the tractor Operator’s Manual for the proper hydraulic fluid and the correct hydraulic fluid level.
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