GMC 4000 Series Service Manual page 490

1 Cowl Bracket
2 Floor Seal
3 Dash Bracket
4 Column Clamp
5 Steering Column
6 Directional Switch
Housing
7 Upper Steering Shaft
8 Steering Wheel Lock
Nut
9 Lower Column Clamp
10 Steering Shaft
Figure 14— Steering Colum n and Shaft (Conv. Models)
splined shaft, and joint assem bly. Lubricate and
insert splined end of shaft (9) into intermediate
slip yoke assembly (6). Crimp ends of dust cap
tabs into groove at end of slip yoke.
G M C S E R V I C E M A N U A L
11 Lower Bearing
12 Inner Seal
13 Spring Seat
14 Spring
15 Outer Seal
16 Stop Clamp
17 Center Universal
Joint
18 Slip Yoke
19 Lower Shaft Clamp
20 Worm Shaft
T-5796
MECHANICAL STEERING
1 Notch in Receiver Cup
2 Retainer Screw
3 Bushing Spacer
4 Receiver Cup
5 Alignment Mark
Figure 15— Horn Assem bly Components
6. Slide stop clamp and bolt (16), outer seal
(15), spring (14), spring seat (13), and inner seal
(12) on upper steering shaft, and in that order. In­
stall floor column seal (2) on steering shaft or
column before assembling shaft to steering column.
7. Insert single or two-piece shaft through
lower bearing (11), and push upward through upper
bearing until shaft (7) extends past top of mast
jacket.
8. Referring to figure 15, insert horn contact
cartridge assembly (7) into hole in steering wheel
hub. Insulator and brush should extend past the
underside of hub when fully positioned as shown.
9. Referring to figure 15, install diaphragm
type spring (9) receiver cup (4) and plastic bushing
spacer (3) into opening at top side of steering wheel
hub. Secure all parts with three screw s (2) and
torque to 20-30 inch-pounds. At under-side of hub,
check movement of horn contact brush (8); it should
Sec. 9A
Page 479
6 Steering Wheel Hub
7 Horn Contact
Cartridge
8 Contact Brush
9 B ellville Spring