EEWH312A Tire Changer Operation Manual
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NOTICE!
SOME TIRES HAVE A COLOR DOT THAT IS TO BE
KEPT ON THE OUTSIDE OF THE WHEEL AND IS TO BE
ALIGNED WITH THE VALVE STEM. IF THIS IS THE CASE
BE SURE TO ATTAIN PROPER ALIGNMENT PRIOR TO
TIRE INFLATION.
B. Lock the rim to the turntable and rotate it so that the
valve is at the 2 o’clock position. Place the tire to be
mounted on the rim. Swing the mount/demount arm in so
that the mount/demount head is in the working position.
(Fig. 20) Engage the lower bead OVER the mount/de-
mount head and UNDER the mounting fi nger of the mount/
demount head (Fig.20). Turn the wheel clockwise (right
pedal down) while simultaneously pushing the tire down
into the drop center, opposite to the mount/demount head.
338
Fig.20
C. Mount the upper bead following the directions in section
B. With low profi le tires the bead holding clamp (option 66735
Fig.21) can help to prevent the top bead from prematurely
seating during the mounting cycle.
NOTE: Bead Holding Clamp must be removed prior to com-
ing full circle and impacting the mount/demount head.
39
Fig.21
4.3 INFLATION OF TUBELESS TIRES.
Make sure that both beads are properly lubricated.
BEAD SEATING IS THE MOST DANGEROUS PART OF
MOUNTING A TIRE.
NEVER STAND OVER TIRE WHEN ATTEMPTING TO SEAT
BEADS OR DURING INFLATION
IT IS POSSIBLE TO INCORRECTLY MOUNT TIRES THAT
ARE 1/2” SMALLER IN DIAMETER THAN THE RIM THAT
THEY ARE MOUNTED ON. WHILE THESE BEADS WILL
SEAL, IT IS IMPOSSIBLE TO GET THEM TO SEAT IN
THEIR PROPER POSITION.
EXPLOSION OF A TIRE MAY CAUSE SEVERE INJURY
OR DEATH.
Infl ate tire according to manufacturers recommendations.
SAFETY RESTRAINT ARM MUST BE IN PLACE PRIOR
TO ATTEMPTING BEAD SEATING OR INFLATION.
NEVER EXCEED THE MAXIMUM PRESSURE ALLOWED
BY THE TIRE MANUFACTURER.
THE RIM MUST BE UNCLAMPED WHEN INFLATING BUT
ONLY AFTER THE BEADS HAVE BEEN SEATED.
THE OPERATOR MUST STAND CLEAR FROM THE
WHEEL WHEN INFLATING, AND PRESSURE MUST BE
MONITORED FREQUENTLY TO AVOID OVER INFLA-
TION.
BEFORE INFLATING A TIRE, CHECK THE CONDITION
OF THE TIRE AND THE RIM.
Due to unusual confi gurations or the stacking of tires the
infl ation process may be diffi cult. To assist with this problem
the Snap-on EEWH312A and Series Tire Changers are
equipped with bead seater jets integrated into the table top.
To utilize the bead seater proceed as follows:
A. Position the safety restraint arm over center of wheel
assembly. The safety arm is lifted upward by grasping the
safety restraint position knob and lifting upward while simulta-
neously depressing the anti-rotation lock arm. Swing safety
arm assembly so the circular retainer is centered over the
rim. Note that air pressure to the infl ation hose will not fl ow
until the arm is centered over the rim.
B. If possible lock the wheel from inside. Outside locking
reduces effi ciency.
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