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SECTION 2 - OPERATION
2-147
FEEDBACK POTENTIOMETER
On occasion, the feedback potentiometer,
located on the right hand side of the rockshaft,
may need to be adjusted. This will ensure that
the lift cylinders do not overextend or retract too
far and place the hydraulic system in high
pressure standby during full raise or lower
modes of operation while in the automatic
mode. To adjust the potentiometer, use the
following procedure:
1. Park the tractor on level ground. Set the
parking brake and engage the articulation
lock.
2. Engage the manual switch and raise the
hitch to the full up position.
3. Turn the engine off.
4. Measure the length of the exposed lift
cylinder rod from the base of the rod ,1, to the
grease zerk, 2.
5. Start the tractor and lower the three-point
hitch.
6. Engagethe automatic mode of operationand
raise the hitch to the full UP position.
7. Turn the engine off.
8. Measure the length of the exposed lift
cylinder rod from the base of the rod , 1,to the
grease zerk, 2. The measurement should be
approximately 6mm to 5mm (1/4″ to 3/16″)
shorter than the measurement obtained in
step 4 of this procedure.
2
1
Figure 2-212
2
1
Figure 2-213