Chevrolet 10 Series 1968, Service Manual, Page: 541 / 713

STEERING 9-8
F ig. 15—Medium and Heavy Duty Mast Ja c k e t
Mounting (T yp ica l)
wood on top of adjusting ring and tap until shifter
tube bottoms. Remove spacer, low and reverse shift
lever and adjusting ring.
NOTE:
Bearing must be seated against the
three locating tabs.
On automatic transmission models:
Align three holes in selector (detent) plate with
three holes in bottom of mast jacket. Position
clamping ring, align holes and install the three bolts.
6 . On 3-speed models;
Lubricate and install spacer, low and reverse shifter
lever (tang on lever must be towards top of mast
jacket).
7. Install lower adjusting ring with clamp and attaching
screws.
8 . Position bushing seat and bushing on upper end of
mast jacket.
9. Lubriplate inner diameter of shifter lever support
housing and install on upper end of mast jacket
assembly, fitting keyway in housing over key on
shifter tube.
10. Position spacer and thrust washer onto upper end of
shifter housing.
11. Install directional signal switch and housing assem­
bly, feeding wires through gear shift lever support
housing. Secure with three attaching screws.
12. Adjust shifter tube as outlined under Shifter Tube
Adjustment.
13. Position clamp, washer, spring and lower mast
jacket bearing on steering shaft, and insert shaft
into mast jacket from bottom.
14. Install nut and washer on steering wheel end of
steering shaft to hold the shaft in position.
Disassem bly—4 0 -5 0 -6 0 Series (Fig. 17)
1. Slide steering shaft out of mast jacket from bottom,
along with lower bearing clamp, seal spring and
bearing seat.
2. Loosen turn signal switch retaining screws and re­
move turn signal housing and switch assembly.
Assem bly (Fig. 1 7)
1. Install turn signal switch and housing assembly on
upper end of mast jacket.
2. Position clamp, seal, spring, lower bearing and
lower bearing on steering shaft.
NOTE: Lubricate seal with a silicone grease.
3. Carefully insert steering shaft into mast jacket from
bottom.
4. Adjust lower mast jacket bearing as outlined under
Maintenance and Adjustments.
Fig. 16—3-Speed Mast Ja ck e t and Shifter Tube
CHEVROLET TRUCK SERVICE MANUAL