Chevrolet 10 Series 1970, Service Manual

Page: 511 / 671

fla t su rface to determ in e steerin g wheel position at
which veh icle follow s a straight path.
2. W ith fron t wheels set straight ahead, check position
of m ark on w orm shaft designating steerin g gea r high
point. T h is m ark should be at the top side of the
shaft at 12 o 'c lo c k position and lined up with the
m ark in the coupling lo w e r clamp.
3. If gea r has been m oved o ff high point when setting
wheels in straigh t ahead position, loosen adjusting
s le e v e clam ps on both le ft and right hand tie rods,
then turn both sle e v e s an equal number of turns in
the sam e d irection to b rin g gea r back on high point.
CA U TIO N :
Turning the s le e v e s an unequal
number of turns o r in d ifferen t d irection s w ill
disturb the to e -in setting of the wheels.
NOTE:
The tie rod adjusting s leeve clamp
fasten ers a re im portant attaching parts in that
they could a ffect the p erfo rm a n ce of vita l com ­
ponents and system s, and/or could resu lt in
m ajor rep a ir expense. Th ey must be replaced
with one of the sam e part number o r with an
equivalent part if replacem en t becom es nec­
essa ry. Do not use a replacem en t part of le s s e r
quality o r substitute design. Torqu e values must
be used as s p ecified during rea ssem b ly to assure
p ro p er retention o f this part.
4. Readjust to e -in as outlined in Section 3 (if n ecessary).
Steering G ear High Point C e n te r in g -
All Except C -P l0 -2 0 - 3 0
T h ese v eh icles a re built with the steerin g gea r on high
point with the fron t wheels in a straigh t ahead position.
T h e s e units in corp orate a non-adjustable tie rod which
p re v e n ts this adjustment.
An adjustable connecting rod is available which w ill
p e r m it high point cen terin g on C40-50 s e rie s trucks with
5000# and 7000# axles (fo r s e r v ic e only). To adjust high
point, p roceed as fo llo w s:
1. R em ove the connecting rod as outlined la te r in this
section.
2. Install the new adjustable connecting rod.
3. Set the fron t wheels in a straight ahead position.
T h is can be done by d rivin g the veh icle a short d is­
tance on a fla t su rface to determ ine steerin g wheel
position at which the veh icle fo llo w s a straight path.
4. W ith the w heels set straigh t ahead, the steerin g gear
w orm shaft fla t should be at 12 o ’ clock position. A d ­
just the connecting rod until the fla t is at 12 o 'clo ck .
Torqu e the castellated nuts on the connecting rod and
in sert cotter pins.
NOTE:
The adjustable steerin g connecting rod
fa sten ers a re im portant attaching parts in that
they could a ffect the p erform a n ce of vita l com ­
ponents and system s, and/or could resu lt in
m a jo r re p a ir expense. They must be replaced
with one of the sam e part number o r with an
equivalent part i f replacem ent becom es nec­
essa ry. Do not use a replacem ent part of le s s e r
quality o r substitute design. Torque values must
be used as sp ecified during rea ssem b ly to assure
p rop er retention of this part.
Steering W heel A lig n m ent
NOTE:
On C - P 1 0 - 20-30 s e rie s units check
steerin g gea r fo r high point centering b efo re
checking steerin g wheel alignment.
1. Set wheels in straigh t ahead position by drivin g
v e h icle a short distance.
2. Note steerin g wheel position. If o ff m ore than 1 inch
fro m center (fig s . 3 & 4), rem ove steerin g wheel and
reposition.
NOTE:
The steerin g wheel to steerin g shaft
F ig . 4 — S t e e r in g W h e e l A l i g n m e n t
CHEVROLET TRUCK SERVICE MANUAL
DO NOT MISALIGN
MORE THAN 1 '/s
INCH FROM VERTICAL
STEERING 9-3
F ig . 3 — S t e e r in g W h e e l A l i g n m e n t