COATS Extended Mobility (EMT) RunFlat Tires - Manual (Page 29)

Student Name ………………………………………………………………
Signature ………………………………………………… Date……………
Instructor ……………………………………………………………………
Signature for completion of Test ………………………… Date…………
Test for Performance Certification for EMT I–1
15
min
Stop Time
I
S = Successful Demonstration of Ability N = Needs more Practice
Bead Loosening
1. Mark both tire and wheel with their location
on the vehicle (i.e., LF, LR, LR, RR)
2. Inspect wheel and tire for damage.
3. Remove valve core and allow the tire to
deflate completely. Remove all wheel weights
from the wheel.
4. Roll the tire and wheel into position for bead
loosening, positioning the valve stem near the
top of the bead loosening shoe.
5. Loosen the upper bead without compressing
too far.
6. Turn wheel and tire around and reposition to
loosen the lower bead.
7. Rotate the tire changer table top to position
the clamps at 12, 3, 6, and 9 o’clock and extend
clamps out.
8. Lift the tire and wheel onto the table top and
position into rear clamp. Lower wheel and
clamp wheel externally.
Demounting–( Metal Duckhead) Valve-Type Sensor
1. Lubricate the upper tire bead and wheel lib-
erally.
2. Move swing arm into position and adjust so
that the duckhead is 1/8 inch to 3/16 inch away
from the wheel.
3. Rotate wheel to position the valve at the rear
of the duckhead. Position a drop center tool
directly across from the duckhead. Lube the
end of the lift tool and insert it between the
wheel and tire at the duckhead.
4. Slowly rotate the lift tool over the duckhead
towards the wheel and remove the drop center
tool as the tire bead slides into the drop center
of the wheel.
5. Continue to rotate lift tool until the tire bead
is on the duckhead.
6. Once the upper bead is in position, carefully
remove the lift bar.
7. Remove the upper bead with short table
rotations–3 to 4 inches–until the upper bead is
removed from the rim.
8. Position the sensor/valve once again at the
rear portion of the duckhead.
9. Use lift tool to lift lower bead over the duck-
head. Use a shop rag between the lift tool and
wheel as you begin to rotate the wheel slowly.
10. Continue rotating slowly until the lower
bead is free from wheel.
S N S N