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1
Figure 2
1. Clevis hitch
Adjusting the PTO Shaft
Length
Important
A long PTO shaft is supplied with the
machine to accommodate large variations in the tractor's
PTO. For most tractors this shaft is too long and must be
cut to the correct length or damage may result.
1. Measure the distance from the lock groove of the tractor
PTO shaft to the lock groove of the vac impeller input
shaft. Record this dimension.
2. Fully collapse the PTO shaft and measure the distance
between the lock pin collars. Record this dimension.
3. At its shortest length, the two halves of the PTO shaft
must have at least 1-1/2 inches (37 mm) of additional
clearance to collapse (Fig. 3). If the dimension in step 1
is not at least 1-1/2 inches (37 mm) greater than the
dimension in step 2, the PTO shaft is too long; proceed
to step 4. If there is enough clearance to allow the PTO
shaft to collapse, proceed to step 9.
1
Figure 3
1. PTO shaft
1-1/2 in.
(37 mm)
11
4. Use the following calculation to establish how much
shorter the shaft must be, when connected, to ensure a
clearance of 1-1/2 inches (37 mm):
A. Subtract the dimension recorded in step 2 from the
dimension recorded in step 1. Record this
dimension.
B. Subtract the result in step 4A from 1-1/2 inches
(37 mm). The PTO shaft must be shortened by this
amount.
5. Using a hacksaw, cut the guards and the steel tubes
shorter by the calculated length. Cut both halves of the
PTO shaft.
6. Deburr the ends of the steel tubes internally and
externally.
7. Remove all debris from the tube sections.
8. Grease the steel tubes liberally.
9. Assemble the PTO shaft and secure it to the vac and
tractor.
10. Measure the shaft. If it is not at least 1-1/2 inches
(37 mm), repeat the procedure.
Connecting the PTO Shaft
1. Connect the PTO shaft to the vac impeller input shaft.
2. Connect the PTO shaft to the rear tractor PTO shaft.
3. Slide the PTO shaft forward as far as it will go.
4. Depress the pin to secure the PTO shaft in place. Slide
the PTO shaft back and forth to make sure it is properly
locked.
5. Connect the shield safety chain to the tractor. Make sure
that the chain remains slack when the tractor is turned.
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