pronovost PXPL-86, Operator And Parts Manual

Page: 18 / 54

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MAINTENANCE ON SPEED REDUCER
It is extremely important that the chain inside the chain
box is
tightened. A loose chain will add shocks to the
entire box (chain, sprockets, bearings and spline
couplings to gearbox).
Instructions for speed reducer (with chains)
maintenance
This chain box has double functions.
1) Reduce angles at both ends of PTO in working
position by increasing the input shaft height of 8".
2) Increase PTO capacity by increasing speed from
540 RPM to 1000 RPM.
PTO SHEAR BOLT
Because the PTO is running at 1000 RPM instead of
540 RPM, the shear bolt value must be changed.
AT 540 RPM on a PTO size 80 or 90, the shear bolt
is 12 mm, grade 10.9, part number 9207 .
AT 1000 RPM , the shear bolt must be changed
depending on the diameter of the bore of the shear
plate of your drive line:
a) If the bore is 12 mm, you must use a 12 mm, grade
8.8 bolt that has been reduced to 10 mm at the point of
rupture. part number
9207-375 , or
b) If the bore is 10 mm, vous devez you must use a 10
mm, grade 8.8 bolt, part number
8218 .
ADJUSTMENT OF THE CHAIN'S TENSION
After 10 working hours, the chain’s adjustment must
be checked. In order to do so, verify the backlash
between the input and the output shaft by turning the
input shaft in both directions while the output shaft
remains still. If there is a play of 10° or more, the chain
must then be readjusted as follows:
1) Remove PTO from the chain box.
2)
Unscrew the 12 bolts 5/16" dia. (item #22) from
covers (items #7 and #15) around the input shaft
on both sides of the chain box (6 bolts on each
side).
NOTE: Input shaft covers are eccentric with
outside of covers. Therefore by turning input shaft
cover, center to center distance of shafts will be
changed and thus, this will adjust the chain’s
tension.
3)
With a hammer and a screw-driver or a chisel,
gently turn both covers in the same direction until
the next hole of the cover is in line with the
threaded hole of the chain box.
IMPORTANT: Make sure that the covers
are turned in the same direction and by the
same number of holes.
Otherwise, both shafts will not be parallel and
serious damages might arise.
4) Verify the backlash between both shafts, as
described above. If the difference is too high,
repeat the operation explained in point 3. If the
backlash is correct, reinstall the bolts and the PTO.
5)
Verify the backlash every 100 working hours.
MAINTENANCE ON SPEED REDUCER
1) Check oil level in speed reducer once a month.
Adjust to required oil level as per drawing in Parts
List section. Use
Enduratex EP-68/220 oil or
equivalent.
2) Change the oil of the speed reducer once a
year. Adjust to required oil level as per drawing in
Parts List section. Use
Enduratex EP-68/220 oil
or equivalent.
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