sarvaria Multilift Installation Manual page 21

j. Remove the bearing.
k. Remove the shaft collar mounted on the acme
screw just under the top bearing.
Figure 42
Remove the shaft collar mounted on the acme screw
l. Loosen the two set screws holding the acme screw
into the lower pillow block.
Figure 43
Loosen set screws holding acme screw in lower pillow
block
m. Raise the acme assembly screw out of the lower
pillow block and slide it out toward the front. Note
that at this point, the main crossmember is still
mounted on the screw as shown below.
Figure 44
Acme screw assembly
3 Remove the main nut and the back-up nut by rotating
the acme screw while preventing the main
crossmember from turning.
Part No. 000643, 26-m02-2013
Acme screw
Crossmember
Reassemble the acme screw
1 Assemble the main nut and the back-up nut on the
main crossmember as shown in Figure 44.
2 Insert the acme screw through the main nut and the
back-up nut. The back-up nut has to be positioned
(threaded) in order to respect the minimum (3/8") and
maximum (1/2") distances from the main nut as shown
in Figure 44.
3 Make sure the main nut and back-up nut are clean and
free of any solid debris to ensure proper action of the
microswitches.
Figure 45
Distance between main nut and back-up nut
4 Follow these steps to install the acme screw.
a. Install the V-belts around the acme screw while
trying to prevent them from getting grease on
them. Note that if one of the V-belts needs to be
replaced, they must all be replaced at the same
time.
b. Insert the top of the acme screw through the top
support and slide the bottom into the lower pillow
block.
c. Place the top bearing on the acme screw. Ensure it is
free of dirt and properly lubricated. Repack with
wheel bearing grease if necessary.
d. Insert the square nut at the upper end and tighten it
until the shoulder at the bottom of the acme screw
is within the minimum (1/16") and maximum (1/4")
values specified in Figure 45.
Figure 46
Distance between shoulder and pillow block
Page 21
Min 3/8"
Max 1/2"
Min 1/16"
Max 1/4"
Multilift Installation Guide