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Sec. 10-6
WHEELS AND TIRES
th e t i r e bead is a DANGEROUS PRACTICE which
can re s u lt in a b ro k en t i r e bead, and s e rio u s in
ju ry to th e s e rv ic e m a n . A ll of the follow ing safety
p re c a u tio n s should be o b se rv e d .
1. Make s u r e th a t r im flang es and bead ledge
(esp e c ia lly hump and rad iu s) a r e a s a r e sm ooth
and clean . R em ove any oxidized ru b b e r, d rie d soap
so lu tion, r u s t, heavy p ain t, e tc ., w ith a w ire b ru sh ,
o r in e x tre m e c a s e s , a file .
NOTE: R epaint b a re m etal w ith a good g ra d e
of alum inum p a in t o r equivalent, to p re v e n t ru s t.
2. L u b ric a te t i r e b ead s, rim flan g es, a n d b e a d
ledge a r e a s w ith a lib e r a l am ount of thin v egetable
o il soap solu tio n , o r ap proved ru b b e r lu b ric a n t.
3. In su re th at a i r p r e s s u r e build -u p during
the bead se atin g p ro c e s s is not allow ed to exceed
40 pounds p r e s s u r e .
IMPORTANT: If b ead s have not s e a te d by the
tim e p r e s s u r e re a c h e s 40 pounds, a sse m b ly should
be deflated, re p o sitio n e d on rim , re lu b ric a te d , and
re -in fla te d .
4. Make s u r e valve c o re is in s e rte d in valve
s te m p r io r to in flatin g.
5. U se an ex ten sio n gauge w ith clip on chuck
so a i r p r e s s u r e build-up can be c lo sely w atched
and so th at you can sta n d w ell back fro m the a s
sem b ly during th e b ead se a tin g p ro c e s s to avoid
p o ssib ility of p e rs o n a l in ju ry .
MATCHING SIDE AND LOCK RINGS
Side and lock rin g s of d iffe re n t r im ty pes a re
not in te rc h a n g e ab le. Some may a p p e a r to be, but
they do not fit p ro p e rly on the r im b a s e . S erio u s
ac c id e n ts
have r e s u lte d fro m the u se of m is
m atched rim g s . R im b a se and rin g s m ust be m atch
ed acco rd in g to m a n u fa c tu re r, s iz e and typ e. T his
in fo rm atio n is sta m p ed on each p a r t.
T U B E -T Y P E WHEELS AND TIRES
In sta llin g Synthetic T ubes
1.
B efo re in sta llin g tube in ti r e , clean in sid e
of ca sin g thoroughly.
Figure 8 —Slide Ring A ssem bly Points
2. I n s e rt tube in t i r e and in flate u n til it is
n e a rly rounded out.
3. In sp ect rim fo r r u s t sc a le and bent flanges
- - clean r u s t sc a le and stra ig h te n flanges w here
n e c e s s a ry .
4. U sing a b ru sh o r cloth sw ab, apply a so lu
tion of n e u tra l vegetable oil soap to the in sid e and
ou tsid e of t ir e b eads and also to the tim sid e of
th e tube. Do not allow soap solution to run down
into t i r e . In s e rt flap in tir e if used.
5. C en te r valve and pu ll it firm ly a g a in st the
rim . Hold in th is p o sitio n and in flate un til tir e
b eads a r e firm ly s e a te d on rim a g a in st flan g es.
6. C om pletely d eflate tir e by rem oving valve
c o re . R e -in fla te to c o r r e c t p r e s s u r e .
NOTE: When tube and flap a r e not p ro p e rly
lu b ric a te d and m ounted, they w ill s tr e tc h thin in
th e tir e bead and rim reg io n . T his w ill cau se p r e
m a tu re fa ilu re .
TWO SECTION RIMS
To fa c ilita te a sse m b ly and rem o v al, two c u t
away se c tio n s "A " (fig. 8), and an o p e ra tin g notch
"B " a r e in c o rp o ra te d in the locking flange of the
sid e rin g .
In se p a ra tin g the sid e rin g fro m the w heel rim
of the s p a re o r new w heel fo r tir e in sta lla tio n ,
sta n d the w heel up w ith the o p eratin g notch in the
sid e rin g a t the top. The s tra ig h t end of a t ir e iro n
is in s e rte d and d riv en into the o p eratin g notch (fig.
9). The tool is m oved a s a le v e r to lift the side
rin g away fro m the rim . A fter the sid e rin g has
p a s s e d o v er the rim g u tte r a t the o p e ra tin g notch,
w ork p ro g re s s iv e ly aro u n d e n tire rim u n til sid e
rin g is se p a ra te d fro m w heel rim .
D em ounting T ire
1. C om pletely d eflate t ir e by rem oving the
valve c o re .
2. L oosen the tir e bead fro m its s e a t in the
sid e rin g by driving the tir e iro n betw een the tir e
bead and the sid e rin g (fig. 10). R epeat th is o p e r
ation p ro g re s s iv e ly aro u n d the sid e rin g pry in g
u n til bead is lo o se.
3. In s e r t s tra ig h t end of t i r e iro n into o p e r
atin g notch lo c a te d at double p im p le s "B " (fig. 12).
4. P u sh sid e rin g down a t point opposite o p e r
ating notch and fo rc e tir e iro n handle down causing
sid e rin g to disengage fro m rim g u tte r. R epeat
p ro g re s s iv e ly around the sid e rin g , pry in g rin g
fro m rim g u tte r un til fre e .
5. To fre e opposite tir e bead fro m w heel rim ,
tu rn tir e o v e r and re p e a t bead loosening o p e ra tio n
(fig. 11).
NOTE: It is not n e c e s s a ry to rem o v e sid e rin g
L L ? 8 4 3
fro m t ir e bead if t ir e is to be rem o v ed fo r tube
r e p a ir only. Sim ply lo o sen tir e bead fro m w heel
rim a s shown in fig u re s 10 and 11 and rem o v e tube.
CHEVROLET 40-60 TRUCK SERVICE MANUAL
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