Chevrolet 10 Series 1968, Service Manual

Page: 538 / 713

STEERING 9-5
in flange slots. Install and tighten the attaching
bolts, nuts, washers and retainers. Torque to 20
ft. lb.
2. Align the “ split-clamp” to the steering gear worm
shaft and install the coupling.
3. Install the special bolt into the clamp and tighten.
Universal Joint Type (Fig. 10)
NOTE: Some models use an intermediate shaft
with a splined slip joint. On these models,
lowering the steering gear or steering column
is not necessary. Separate the upper coupling
as described below, remove intermediate shaft
and coupling and disassemble lower coupling on
bench.
Removal
1. After making steering shaft to worm shaft relation­
ship remove bolt, nut and washer from clamp on
steering gear wormshaft.
2. On tilt cab models, remove plate-to-floor panel
screws.
3. From the upper yoke of the universal joint, remove
the two snap rings, then remove the two yoke bush­
ings and cork or rubber washers, by tapping yoke
shaft with plastic mallet.
4. Move the center cross as necessary, to separate the
upper and lower portions of the coupling.
5. Remove the coupling from the vehicle.
6
. Disassemble lower portion of coupling on bench, by
repeating Steps 3 and 4.
Installation
1. Position center cross in lower yoke of coupling.
2. Position bushing and new cork washer on center
cross. Install retaining snap ring.
3. Place a second bushing and new cork washer on
center cross and retain with snap ring.
4. With cross installed in lower yoke, install coupling
in vehicle by assembling lower yoke to upper yoke as
outlined in Steps 2 and 3.
5. Assemble coupling to steering gear wormshaft align­
ing mark on wormshaft with mark on steering shaft.
6 . Install clamp bolt nut and washer and tighten.
7. On tilt cab models secure floor pan seal plate to
floor pan.
Intermediate Steering Shaft Models with Splined
Slip Joint (Fig. 10)
Rem oval and Installation
Remove and install as outlined under “ Steering
Coupling—Universal Joint Type” .
Disassem bly
1. With shaft on bench straighten tangs on dust cap and
slide yoke shaft out of yoke tube.
2. Remove felt washer dust cap and plastic washer.
Discard felt washer.
3. On Tilt Cab models, remove toe panel seal and seal
plate from shaft.
Assem bly
1. On tilt cab models, install toe panel seal and seal
plate on yoke shaft.
2. Position dust cap,'plastic washer, and new felt wash­
er on yoke shaft.
3. Aligning the arrow on the yoke shaft with the arrow
on the yoke tube, insert yoke shaft into yoke tube.
4. Push plastic washer, felt washer and dust cap into
position, on end of yoke tube, and bend tangs of dust
cap down against yoke tube.
STEERING GEAR—EXCEPT CHEVY VAN
Removal
1. Set wheels in straight ahead position. Mark steer­
ing shaft to worm shaft relationship and loosen bolt
attaching lower end of shaft coupling to steering gear.
2. Disconnect pitman arm from steering gear. Use
Tool J-6632 on light-duty models and Tool J-3186 on
medium and heavy-duty models.
3. Remove all steering gear to frame mounting bolts
and remove gear from vehicle.
Installation
1. When reinstalling steering gear assembly after re­
placement of worm shaft, determine the correct mid­
position of the worm shaft as follows:
a. Turn the shaft all the way through its travel,
counting the number of turns.
b. Turn the shaft back one-half the total number of
turns. The gear should now be on high point.
NOTE: On production C-K-P-10-20-30 Series
worm shafts, this mark will coincide with the
mark already on the shaft.
2. Position steering gear in place on frame, at the
same time sliding the worm shaft into the flexible or
universal joint coupling. Check that the steering
wheel is in the straight ahead position.
Fig. 10—Universal Jo in t Type Steering Couplings and
Intermediate Steering Shaft S lip Jo in t
CHEVROLET TRUCK SERVICE MANUAL