Warner Electric PB-650 Pin Drive - Manual (Page 7)

7 Warner Electric • 800-825-9050 819-0485
C. Assembling the Armature and Hub
The heavy duty units contain spline drive
armatures and hubs. The armatures are shipped
with a built-in autogap spring accessory. This
device automatically maintains a gap of about
1/32" between the armature and magnet faces
for the life of the unit.
Follow these instructions to assemble the
armature and splined hub.
Step 1
Place the splined hub on a flat surface. The
extended portion of the hub, where the set
screw holes are located, should be down.
Step 2
Check the detent ring in the armature assembly
to make sure it is centered evenly around the
spline. This ring moves freely, but it should be
centered for easier assembly of the hub.
Step 3
Holding the armature with the segmented side
up, press the armature onto the splined hub.
This is most easily done by applying firm
back-and-forth pressure. (Figure 4)
1/32-inch
Armature
Magnet
Figure 5
Figure 4
Step 4
Push the assembly against the retainer ring.
D. Mounting the Armature-Hub Assembly
1. Slide the armature-hub assembly onto the
shaft until the armature face touches the
magnet face.
2. Move the assembly back to allow a gap of
about 1/16" between the two faces.
3. Secure the armature-hub assembly in this
position by tightening the two setscrews in
the hub.
4. Check the assembly by pressing the
armature into contact with the magnet face
and then releasing it. The armature should
spring back about 1/32". This gap will be
automatically maintained throughout the life
of the unit. (Figure 5)