Chevrolet 10 Series 1968, Service Manual

Page: 534 / 713

SECTION 9
STEERING
CONTENTS OF THIS SECTION
Page
Standard S te e r in g ................................................................... 9-1
Pow er S t e e r in g .......................................................................9-12
Special T o o l s .......................................................................... 9-17
STANDARD STEERING
INDEX
Page
General D e s c r ip t io n ............................................................. .....9-1
Maintenance and A d ju s tm e n ts ............................................. .....9-1
L u b r ic a t io n .......................................................................... .....9-1
A d ju stm en ts.......................................................................... .....9-1
Steering G e a r .........................................................................9-1
Steering Gear High Point Centering
C-P10-20-30 ................................................................ .....9-2
Steering Wheel A lig n m e n t ............................................. .....9-3
Mast Jacket Low er B earing A d ju s t m e n t................... .....9-3
Shifter Tube A d ju s tm e n t................................................ .....9-3
Component Replacement and R e p a i r s ................................ .....9-4
Steering W h e e l .........................................................................9-4
Mast Jacket Upper B e a r i n g ............................................. .....9-4
Steering C ou p lin g................................................................ .....9-4
Flexible Joint Type ........................................................... 9-4
Page
Universal Joint T y p e .......................................................9-5
Intermediate Steering Shaft - Models with
Splined Slip J o in t............................................................. 9-5
Steering Gear - Except Chevy V a n ................................ 9-5
Steering Gear - Chevy V a n ............................................. 9-6
Sector Shaft Oil Seal R e p la c e m e n t ................................ 9-6
Mast Jacket - Except T ilt Cab M o d e ls ..........................9-6
Mast Jacket - T ilt Cab M o d e ls .......................................9-9
Steering L in k a g e ....................................................................9-9
T ie R o d ................................................................................ 9-9
Relay Rod - C-P10-20-30 ................................................ ..9-9
Id ler A rm - C-P10-20-30 ................................................ ..9-10
Pitman A rm
.......................................................................9-10
Steering Connecting R o d ................................................... 9-11
Steering A r m s ................................................................... 9-11
GENERAL DESCRIPTION
The steering gear used on all truck models is of the
recirculating ball type and the service procedures are
basically the same for all units.
Two types of steering linkages are used. C-P10-20-30
series units have an adjustable tie rod connected to the
steering arm at each wheel. Steering effort is trans­
mitted to the tie rods through a relay rod connected to
the pitman arm on the left and an idler arm on the
right. All other models use a single adjustable tie rod,
connecting the left and right steering arms. Steering
effort is relayed to the left steering arm, from the pit­
man arm, by a non-adjustable connecting rod.
MAINTENANCE AND ADJUSTMENTS
LUBRICATION
The steering gear is filled at the factory with a water
resistant grease. Seasonal change of this lubricant is un­
necessary and the housing should not be drained. The
steering gear lubricant level should be checked every
36,000 miles. Whenever required, additions should be
made using a water resistant EP Chassis Lubricant.
At specified intervals, remove filler plug in housing
and add lubricant to bring level up to filler plug opening.
Do not overfill housing (fig. 1).
ADJUSTMENTS
Steering Gear
Before any adjustments are made to the steering gear
in an attempt to correct such conditions as shimmy, loose
or hard steering and road shocks, a careful check should
be made of front end alignment, shock absorbers, wheel
balance and tire pressure for possible cause.
Correct adjustment of steering gear is very important.
While there are but two adjustments to be made, the
following procedure must be followed step-by-step in the
order given.
CHEVROLET TRUCK SERVICE MANUAL