Chevrolet 10 1971 Series Chassis Service Manual page 376

WHEELS AND TIRES 10-8
Fig. 12— Loosening First Bead
6. Check assembly for air leaks, then inflate tire to
pressure recommended for vehicle operation.
If a seal cannot be effected in the fore­
NOTE:
going manner with the rush of air, it can be ac­
complished by applying a mounting band or heavy
sash cord to the circumference of the tire and
then tightening with a tire iron.
RHP RIMS
The RHP rim uses a continuous side ring which has
two cutouts directly opposite each other and a single tool
notch located approximately 45 degrees from one cutout,
(fig. 11). The cutouts enable the continuous side ring to
be buttoned on to the rim base without deforming either
the ring or rim.
RHP Rim— Tire Replacement
Safety Precautions
• Use only parts free from damage or heavy rust.
• Insure that side ring is completely seated before in­
flating tire.
• Inflate tire in safety cage or use clip-on type air
chuck so that operator may stand aside during infla­
tion.
• Insure that tire is completely deflated prior to re­
moval of rings.
Demounting
1. First remove valve core to completely deflate tire.
2. Place tire and wheel on floor with side ring up.
3. To loosen first bead, drive hooked end of rim tool
between tire and rim flange and press downward on
bead (fig. 12). Progress around rim, using 2 tools,
as shown.
4. The side ring is ready to demount if it is loose and
turns easily in the rim gutter.
5. Locate the tool notch in the side ring and insert the
rim tool or a long, husky screwdriver and pry up
(fig. 13), making sure the opposite side of the ring
is fitting into the rim gutter. Do not bend the ring.
Fig. 13— Removing Ring
6. Now a second tool can be inserted (see fig. 14) and
used with the first to walk the tools in a counter­
clockwise direction from the tool notch (work toward
the cutout that is farthest from the tool notch).
7. When the tools reach the cutout the ring will usually
spring off. If necessary, a light tap with the mallet
will free the last half of the ring after it has been
pried up so both cutouts are visible.
8. Force upper tire bead into well opposite the valve
slot and with tire tool pry opposite portion of bead
over edge of rim (fig. 15).
9. Turn tire over and by means of rim tools, loosen
bead on opposite bead seat. This can be further
aided by using foot pressure.
10. Make sure one portion of second bead is still in the
rim well, then pry opposite portion of bead o/er edge
of rim (fig. 16). This will free the tire from the rim.
3 . INSERT SEC O N D TOOL NEXT TO THE
FIRST A N D W A LK RING OUT OF RIM
GUTTER. W O R K TOOLS IN COUNTER
CLOCKW ISE DIRECTION FROM TOOL
NOTCH.
Fig. 14— Removal of Side Ring
2.INSERT RIM
TOOL IN
NOTCH A N D
PRY RING
10-30 CHEVROLET TRUCK SERVICE MANUAL