COATS Kit 8184177 Robo-Arm and Accessory Kits - Manual (Page 3)

Robo-Arm™
COATS Robo-Arm™ Assembly • 3
Servicing Custom Wheels
with the Robo-Arm™
This accessory is normally used in the servicing of performance
and large heavy tires and wheel combinations.
Only tire technicians with experience and training on
custom wheels should attempt to service expensive
custom alloy or aluminum wheels and high-perform-
ance low-profile tires.
Pre-Operation Notes:
• Ensure all weights have been removed.
• Clamp wheel from the outside.
• Use ample lubricant for mount and demounting
• Always review wheel nicks and/or scratches with the owner
before servicing.
Performance Tires and Wheels • Demounting
Follow these instructions for performance type tires and
wheels, including run-flat tires and their associated wheels, and
asymmetrical hump wheels.
1. Remove valve core and completely deflate tire.
2. Pull the bead loosener shoe away from the machine and roll
the tire into position against the bumper pads. Position the tire
with the valve stem in the 2 o'clock position (in direct line with
the bead loosener shoe). Always loosen the bead on the nar-
row/mounting side of the wheel first (Figures 1 and 2).
AA: Wheels with an asymmetrical hump have a larger “ledge”
type hump around the wheel except at the valve hole making
them more difficult to mount and demount (Figure 3). Always
loosen the beads near the valve stem on both sides of rim first.
AB: Some wheels/tires have a low pressure sensor/transmitter
strapped to the wheel (Figure 4). This is especially true on run-flat
tire/wheel systems. The sensor is positioned directly opposite
from the valve stem. Other low pressure warning systems have
the sensor as part of the valve. To avoid damaging the sensor,
CAUTION
Valve Stem
Figure 2 - Position Tire for Bead Loosening
Figure 1 - Determining Mounting Side of Wheel
Narrow Side
Long Side
Drop Center
Smooth
Hump
At Valve
Hole
Ledge
Hump -
Rest of
Wheel
Valve Stem
Sensor
Figure 4 - Wheel with Low Pressure
Sensor/Transmitter
Figure 3 - Asymmetrical Hump Wheel