Point row clutches, Point row clutches -17 – Kinze 3140 Stack Fold Planter Rev. 7/14 User Manual

Page 31

background image


Model 3140




Machine Operation


With the use of electric-activated clutches, which disengage
the drive, either half of the planter may be shut off for finishing
up fields or for long point row situations.

The selector switch for the clutches is located in the point row
clutch control box which is installed on the tractor.

NOTE: Switch should be left in OFF position when planter
is not in use. If left in ON (left or right) position, the tractor
battery will be discharged.

NOTE: Since the liquid fertilizer piston pump have their own drive wheels, liquid fertilizer application will not be
affected by use of the point row clutch.

L.H. Side Of Planter Shown

Point Row Clutch Control box

The point row clutch consists of a wrap spring riding on an input hub and an output hub. During operation the wrap
spring is wrapped tightly over the hubs connecting them in a positive engagement. The greater the force of rotation
the tighter the grip of the spring on the hubs. Rotation in the opposite direction or stopping the spring from rotating
prevents the transmission of torque from the input hub to the output hub stopping the planter drive.

The input end of the spring is bent outward and is referred to as the control tang. The control tang fits into a slot in the
stop collar that is located between the input and output hubs and over the wrap spring. If the stop collar is allowed to
rotate with the input hub, the clutch is engaged. If the stop collar is stopped from rotating the control tang connected to
it is forced back and the spring opens. This allows the input hub to continue rotating without transmitting torque to the
output hub; therefore, stopping the planter drive.

The stop collar is controlled by the use of an electric solenoid and an actuator arm. When the selector switch on the
tractor control box is in the OFF position the solenoid coil is NOT ENERGIZED and the actuator arm will not contact
the stop on the stop collar allowing it to rotate with the hubs and drive the planter.

When the operational switch is in the “DISENGAGE” (right or left) position the solenoid coil IS ENERGIZED and the
plunger in the solenoid coil pulls the actuator arm against the stop on the stop collar, disengaging the wrap spring and
stopping the planter drive.









Control Tang