tire mounting worksheet (worth 10 points) name ___________________________________ date ___________________ period ____ objectiv
TIRE MOUNTING WORKSHEET
(Worth 10 points)
Name ___________________________________ Date ___________________
To remove and re-mount a tire on a rim using a tire machine
Valve core tool – Wheel weight tool – tire lubricant or soapy water –
valve stem tool, if necessary
Directions: (Place your initials next to each step after completion)
PART 1: SET UP
___ ASK Mr. Thayer which rim and tire combination to use for this
project. You may use a tire from vehicle which you bring in.
Tire Type (P, LT, or T) _______ NOTE: If no letter is present, the
tire is a “P” for passenger.
Tire Width (in millimeters) _______ Aspect Ratio (%) ________
Construction (R or B) _______Wheel Diameter (in inches) _______
Max Cold Inflation Rating (Maximum pressure, in PSI) _______
Recommended Cold Inflation Rating (Pressure recommended by the vehicle
___ REMOVE the tire/rim from the car, if necessary.
___ REMOVE all wheel weights from both the inside and outside of the
rim. SAVE the old wheel weights for future wheels.
___ REMOVE the valve core in the valve stem with the valve core tool,
and HOLD both tightly during removal. WARNING: The air pressure behind
the core will be very strong.
___ PLACE the core in a safe place for later installation.
___ PLACE the tire in the bead breaker located on the side of the
machine, MAKING SURE the valve stem is always pointing straight up or
straight down. NEVER BREAK the bead by the valve stem, which could
damage the tire pressure monitors.
___ BREAK the bead in 2 places 180 degrees opposite from each other,
on both sides of the rim. Afterwards, you may need to use your hands
to push the bead completely away from the rim.
___ PLACE the rim on the tire machine turntable
___ SECURE the rim to the machine using the correct foot pedal either
by clamping the rim from the inside or the outside. NOTE: If it is a
steel rim, clamp it from the outside in. If it is an aluminum or
chrome rim, clamp it from the inside out. NOTE: Make sure the rim is
level and tight.
___ PUT some tire soap/lubricant all the way around the upper bead,
between the bead and the rim.
___ BACK-OFF the adjustment knob that controls the bead remover
(in-and-out), so that the remover can go all the way towards the
center line of the rim.
___ LOOSEN the up-an-down locking lever on the bead remover.
___ PLACE the bead remover knuckle onto the edge of the rim, all the
way down and in!!!
___ LOCK the arm in place.
___ TURN the in-and-out knob until it contacts the bead remover, and
then TIGHTEN it a little bit more, until the remover is a close as
possible to the rim without actually touching it.
PART 2: DISMOUNTING
___ FIND the tire iron located towards the bottom of the machine, and
PLACE it against the small curved part of the knuckle.
___ REACH DOWN with the iron and HOOK the iron under the top bead of
the tire and PRY the bead over the rim.
___ ROTATE the turntable slightly, until the bead will stay over the
rim by itself.
___ REMOVE the tire iron
___ FINISH ROTATING the turntable until the upper bead is removed; ASK
for help with this step, if necessary
___ LIFT the tire up by hand, and HOOK the iron under the lower bead
of the tire, PRY the bead over the rim.
___ ROTATE the turntable until the lower bead is removed.
___ SWING the remover out of the way.
___ ROLL the tire over to the instructor for inspection; GET his/her
initials here ______, after completing this step.
PART 3: MOUNTING
___ CLAMP whatever rim you will be using onto the turntable.
___ REMOVE any dirt or rust from the rim with a wire brush
___ REPLACE the valve stem at this time (using the valve stem tool),
if necessary or desired.
___ REMOVE any dirt from the bead of the tire you will be using, and
MAKE SURE the bead is not damaged.
___ LUBRICATE both beads of the tire, and the upper edge of the rim.
___ If you are using a different rim than the one previously mounted
to the tire, READJUST the bead remover in and out and up and down.
___ If you are using the same rim that the tire came off of, DO NOT
change the in-and-out or up-and-down adjustments of the bead remover.
___ PLACE the tire over the rim, with the bead remover up against the
rim, as described earlier.
___ USE your right hand to PUSH the lower bead of the tire against the
bead remover knuckle with half of the bead over the knuckle and half
___ ROTATE the turntable until the lower bead goes over the rim. USE
your left hand to push down on the tire, and HELP the tire to rotate
with the rim. DO NOT let the tire slip against the rim. ASK for help
with this step, if necessary
___ REPEAT this process for the upper bead.
___ UNCLAMP the rim from the turntable, if using a chrome or
___ SECURE the machine’s inflator hose over the valve stem, using the
locking clip at the end of the hose.
___ USE the foot pedal at the left of the machine to FORCE AIR into
the tire to seat the bead. CAUTION: When the bead seats, it can make a
very loud popping noise – WARN people in the surrounding area that you
are seating the bead. If the bead will not seat, you may need to ADD
more lubricant to the bead or rim. You may also need to PUSH on
certain parts of the tire to help it seat. ASK for help with this
step, if necessary
___ REINSTALL the valve core using the valve core tool; MAKE sure the
core is tight.
___ ADD the recommended pressure to the tire by using the tire
machine’s inflator and inflator gauge.
___ ROLL the wheel/tire over to the instructor for inspection; GET
his/her initials here ______, after completing this step.
QUALITY CONTROL & CLEAN UP
___ PLACE the wheel and tire in a specially designed tub filled with
water, to CHECK for air leaks.
___ If no leaks are present, CLEAN and STRAIGHTEN UP the area around
the tire machine.
___ RETURN all tools and equipment to their proper locations. NOTE:
All wheels and tires must be rebalanced after being mounted. SEE
separate worksheet on wheel balancing.