GMC 4000 Series Service Manual page 484

7
^ — V —
V-t-
)
10
10 Mounting Bolt Nut
11 Lash Adjuster
12 Mounting Bracket
13 Universal Joint
Figure 5 — Steering Gear and Connections (Tilt Cab M o d els)
4. Remove Pitman arm nut (6) and lock washer;
then using puller (J-3186) remove Pitman arm (7)
(fig. 5).
5. Remove bolts, nuts, and washers which at­
tach steering gear to frame and remove steering
gear.
STEERING GEAR INSTALLATION
1. Position steering wheel in straight-ahead
position and steering gear in center position. Mark
on worm shaft should be in 12 o'clock position on
vehicles equipped with the 549-D type steering
gear and in 6 o'clock position on vehicles equipped
with the 553-D type steering gear.
2. Position steering gear on frame side mem­
ber, and at the same time slide the worm shaft
(3) into the clamp yoke (2) or coupling on steering
lower or intermediate shaft.
IMPORTANT: Check to make sure match
marks on lower or intermediate shaft clamp yoke
or coupling and steering gear worm shaft are
aligned.
3. Install bolts, nuts, and washers which at­
tach steering gear to frame. Tighten bolts to torque
listed in "Specifications" at end of this section.
On all models with "In-line" 292 engine, in-
G M C S E R V I C E M A N U A L
Lower Shaft Yoke
Yoke Clamp
Steering Gear Worm
Shaft
Steering Gear
Mounting Bracket
Pitman Shaft Nut
Pitman Arm
Drag Link Nut
Drag Link
T-5682
MECHANICAL STEERING
LASH ADJUSTER
SIDE COVER
LASH ADJUSTER
LOCK NUT
SIDE COVER
CAP SCREW
Figure 6 — Steering Gear and Shaft (with Flexible Coupling)
stall spacer washer (2) between steering gear and
frame at rear bolt location as shown in figure 7.
4. Attach lower or intermediate shaft clamp
yoke or coupling to steering gear worm shaft with
bolt; or bolt, nut, and washer. Tighten bolt or nut
to torque listed in "Specifications" at end of this
section.
On all vehicles Pitman arm and Pitman shaft
have matching blank serrations which must be
aligned. With Pitman arm and shaft aligned, press
Pitman arm onto shaft and install washer and Pit­
man shaft nut. Tighten nut to torque listed in "Speci­
fications" at end of this section.
STEERING LINKAGE
(Refer to Figure 7)
DESCRIPTION
Turning motion of steering wheel is trans­
mitted through the steering gear (1) and Pitman shaft
(3) to the Pitman arm (5), which is connected to the
drag link (7). Drag link is designed with a ball joint
at each end, and is connected to left front steering
arm (8). Steering control of right wheel is accom­
plished through use of the tie rod which is located
Sec. 9A
Page 473
FLEXIBLE C O U PLIN G
CLAMP BOLT
STEERING GEAR
STEERING GEAR TO
FRAME BOLT NUT
T-3330