Farmer-Helper DW30 Chipper 20 Revision 09 - 2017
Pdf 25.wdp
5.5 DRIVELINE DIMENSION
A PTO driveline is supplied with the machine. To ac-
company the variety of 3 point hitch geometry available
today, the driveline 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 driveline 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 driveline,
follow this procedure:
a. Clear the area of bystanders, especially small
children.
b. Attach the chipper to the tractor but do not
attach the driveline.
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
driveline.
f. If the compressed driveline dimension exceeds the
machine dimension, the driveline will have to be cut.
2. When cutting the driveline, follow this procedure:
a. Subtract the machine dimension (A) from the uncut
driveline dimension (B) or (B-A). This dimension
determines how much too long the driveline is.
DRIVELINE DIMENSIONS
CUT OFF DIMENSION
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.
SHORTENING
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.
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