21
4�5 PTO DRIVELINE
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 (see section
4.6) 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 (A) 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 (B)
exceeds the machine dimension (A), 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=C).
b.
Add one inch (25 mm) to dimension (C) to
determine 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.
g. Raise and lower the chipper. A correctly sized
shaft should not bottom out or come apart.
NOTE
Telescoping shaft
Should overlap at
least 6" under load.
