Chevrolet 1977 10 Series, Repair Manual, Page: 44 / 468

3B-2
OVERHAUL MANUAL
PITMAN
SHAFT
WORM BEARING SECTOR
(LOWER)
EXPANSION
PLUG
BEARING
CUP
CLAMP
LOCK NUT
GUIDE BEARINGS
BALL NUT
SEAL
BEARING
CUP
WORMSHAFT
WORM BEARING
(UPPER)
ADJUSTER
PLUG
S E C TO R
W O R M S H A F T
Fig. 3 B - 3 ~ S t e e r in g G e a r- C o rv e t t e
5. Remove the adjuster plug and locknut assembly
(incorporates the lower worm shaft bearing and race on all
except Corvette - upper w ormshaft bearing race on Corvette).
6. D raw the wormshaft and ball nut assembly from the
housing (fig. 3B-6).
CAUTION: Use care that the ball nut does not run
down to either end o f the worm. Damage will be
done to the ends o f the ball guides i f the nut is
allowed to rotate until stopped at the end o f the
worm.
7.
All Except Corvette--
Remove the upper bearing
from the wormshaft.
Corvette--
Remove lower bearing from inside the gear
housing.
8.
All except Corvette--
Using a suitable size screw
driver, pry the lower bearing retainer from the adjuster plug
housing and remove the bearing (fig. 3B-7).
9. Remove the locknut from the lash adjuster screw in
Fig. 3B-5 -- Re m ovi ng Pitm an S h a f t A s s e m b ly - T y p ic a l
the side cover. Remove the lash adjuster screw from the side
cover by turning the screw clockwise. Slide the adjuster screw
and shim out of the slot in the end of the pitman shaft.
10. Pry out and discard both the pitman shaft and
wormshaft seals.
Inspection
W ith the steering gear completely disassembled, wash
all parts in cleaning solvent. D ry them thoroughly with air.
W ith a magnifying glass inspect the bearings and bearing
races for signs of indentation. Also check for any signs of
chipping or breakdown of the surface. Any parts that show
signs of damage should be replaced
Inspect all seals. Any seal that is worn or has been
removed should be replaced.
Inspect the fit of the pitm an shaft in its bushing in the
side cover. If this bushing is worn, a new side cover and
bushing assembly should be installed.
Check steering gear wormshaft assembly for being bent
or damaged in any way. Never attem pt to salvage steering
parts by welding or straightening.
SIDE COVER
LOCKNUT
LASH ADJUSTER
SCREW
PITMAN SHAFT SEAL
BALL NUT
H O L D A SS E M B L Y
H O R IZ O N T A L T O
PR EVENT BALL N U T
R U N N IN G D O W N T O
E N D O F W O R M S H A F T
Fig. 3B-4~Steering Gear (Corvette and G 10-30 Series Trucks)
Fig. 3B-6~Rem oving the W orm sha ft and Ball N u t-T ypical