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O P E R A T I O N
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A PTO drive line is supplied with the machine. To accompany the variety of 3 point hitch geometry available
today, the drive line can be too long for most machines or too short for others. It is very important that the
drive line be free to telescope but not to bottom out when going
through its working range. If the drive line bottoms out, the bearings
on both the machine and tractor PTO shaft will be overloaded and fail
in a short time.
1. To determine the proper length of the drive line, follow this
procedure:
a. Clear the area of bystanders, especially small children.
b. Attach the chipper to the tractor but do not attach the drive line.
c. Raise the machine until the input shaft is level with the tractor
PTO shaft.
d. Measure the dimension between the locking grooves on the
tractor PTO shaft and the machine input shaft.
e. Measure the same dimensions on the compressed drive line.
f. If the compressed drive line dimension exceeds the machine
dimension, the drive line will have to be cut.
2. When cutting the drive line, follow this procedure:
a. Subtract the machine dimension (A) from the uncut
drive line dimension (B) or (B-A). This dimension
determines how much too long the drive line is.
b. Add another inch (25 mm) to the dimension to be sure it doesn't bottom out, to determine (C) the cut
off dimension.
c. Use a hacksaw to cut dimension (C) from both ends. Cut both the plastic tubes and the metal cores.
d. Use a file to remove the burrs from the edges that were cut.
e. Assemble the 2 ends of the shaft.
f. Make sure the shaft can telescope freely. If it does not, separate the 2 parts and inspect for burrs or
cuttings on the shaft ends. Be sure it telescopes freely before installing.
