COATS 850 Solid State Wheel Balancer - Manual (Page 11)

Figure 8 - Back Cone Mounting
Figure 9 - Front Cone Mounting
Important: To be sure the wheel centers properly, rotate the
wheel on the arbor while tightening the hub nut.
Back Cone Mounting
This mounting method places the spring and cone between
the arbor faceplate and the wheel. The cone centers the wheel
from the back side (figure 8).
1. Place the spring on the arbor with the large end towards
the arbor faceplate.
2. Select the cone that best fits the center hole.
3. Slide the cone onto the arbor large end first.
4. Place the wheel onto the arbor and center it on the cone.
5. Screw the pressure cup/hub nut assembly onto the arbor
and against the wheel. Securely tighten the assembly.
Front Cone Mounting
This method should be used only when the inner surface of
the wheel center hole does not provide an accurate surface for
centering (figure 9)
1. Remove the pressure cup from the hub nut (if attached).
2. Select the cone that best fits the wheel center hole.
3. Position the wheel onto the arbor and push it back against
the arbor faceplate.
4. Slide the selected cone onto the arbor, small end first, and
push it into the center hole on the wheel. Center the wheel on
the cone.
5. Screw the hub nut onto the arbor. Tighten it securely so
that it pushes the wheel squarely against the faceplate.
Protruding Outer Hub
For wheels with a protruding outer hub which will not permit
the use of the pressure cup, or the cup will not permit the hub
nut to engage the arbor threads at least four full turns (fig. 10).
1. Remove the pressure cup from the hub nut (if attached).
2. Place the spring on the arbor, large end first.
3. Select the appropriate cone for the wheel and slide it onto
the arbor, large end first.
4. Position the wheel on the arbor and center it on the cone.
5. Place the no-mar ring onto the hub nut and screw the
assembly onto the arbor. Tighten it securely against the wheel.
Direct Drive
COATS 850SS Wheel Balancer • 5
Wheel Mounting
The inner side of the wheel hub usually has the most
uniform surface for wheel centering. For an accurate
balance, always center the wheel by using the most
uniform surface of the wheel hub. There are three
ways to mount the tire onto the balancer. Review
them before mounting the wheel to determine the
appropriate mounting method.
Be sure the wheel is forced firmly against
the arbor faceplate and the hub nut
engages the arbor threads for at least four
full turns.
CAUTION
Figure 10 - Protruding Center Hub/No-Mar Ring