Do not tighten spokes too tight or nipples may draw through rim, or hub
flanges may be distorted. If spokes are left too loose, they will
continue to loosen when wheel is put in service.
6. File or grind off ends of spokes protruding through nipples to
prevent puncturing tube when tire is mounted.
REMOVING AND INSTALLING TIRES
Wheel rims are of the drop-center type, having a depression or ’'well"
in center of rim. Rim-well, being smaller in circumference than rest of
rim, allows one casing bead to fit loosely in it while other bead is
being worked over edge of rim.
REMOVING TIRE FROM RIM
Remove wheel; lay wheel on its side.
Remove valve cap and valve core to free all air from tube. Remove valve
stem nut (18 in. rim).
Loosen both beads from rim flanges by stepping on sides of tire or by
using a tire tool. Stand or kneel on tire opposite valve to push bead
into rim-well.
Using tire tools (not sharp instruments), start upper bead over edge of
rim at valve. Don’t use force when starting bead over edge of rim with
tire iron, because bead wires may be broken or stretched and tire
ruined. Carefully remove tube before attempting to remove second bead.
Push lower bead into rim-well on one side and insert tire iron on
opposite side and pry bead over flange. After a portion of second bead
is started over rim edge, tire can be further removed from rim without
aid of tire iron.
It is not always necessary to completely remove casing from rim.
Removing one side allows tube to be removed and reinstalled and also
allows inside of casing to be inspected.
MOUNTING TIRE ON RIM
Before installing tube in tire, all dust and dirt, particularly hard
particles which might chafe an inflated tube, must be removed. Wipe tube
and inside of tire thoroughly with clean, dry cloth. If rim is dirty or
rusty, clean with a stiff wire brush. Be sure to examine a used tire
carefully for fabric injuries that may damage tube.
Before mounting tire, see that rubber rim strip is in place in rim-well,
and that rim strip valve hole registers with valve hole in rim.
Tire balance mark on Firestone tires is a red triangle and on Goodyear
tires a red dot.
Insert tube in tire, (placing valve at tire balance mark). Swab
thoroughly all around base of tube, between the tube and side walls of
tire with a heavy suds solution of tire mounting compound and water.
Bead seat of tire should not be coated. Inflate tube just enough to
round it out. With wheel lying flat, place tire on rim and align valve
with hole in rim.
Push bottom bead into rim-well near valve and hold in well while forcing
remaining portion of bead over rim flange with a tire tool.
Spread tire and insert valve through hole in rim.
Force upper bead over rim flange and into well at point opposite valve.
Stand or kneel on this side of tire to hold it in well and pry remaining
portion of tire over rim flange. While forcing bead over rim flange,
keep as much bead as possible in rim-well. Be careful not to damage
beads or pinch tube. Inflate tire to recommended pressure and check
valve for leak. See tire inflation pressures in "Tire Data,” Section 1A.
After inflating to recommended pressure, completely deflate to smooth
out any wrinkles in tube and allow tube to find its place, free from
strain or stress. Again inflate to recommended pressure and check valve
for leak.