Chevrolet 1980 Light Duty Truck Service Manual page 233

BEARING
Fig. 3B4-23--Steering Shaft Intermediate Coupling
2. Remove the coupling clamp bolt. This is a special
bolt and will require a 12 pt. socket or box wrench.
3. Remove the steering gear to frame bolts and lower
the steering gear far enough to remove the flexible coupling.
It is not necessary to disconnect the pitman arm from the
pitman shaft.
4. Tap lightly on the flexible coupling with a soft
mallet to remove the coupling from the steering gear
wormshaft.
Installation
See NOTICE on page 1 of this section
NOTICE:
regarding the fasteners referred to in steps 2, 4 and 5.
1. Install the flexible coupling onto the steering gear
wormshaft, aligning the flat on the shaft with the flat in the
coupling. Push the coupling onto the wormshaft until the
coupling reinforcement bottoms against the end of the
worm.
2. Install the special bolt into the split clamp and
torque to specifications.
The bolt must pass through the shaft
NOTICE:
undercut, or damage could occur to the components.
3. Place the steering gear into position, guiding the
flexible coupling bolts into the proper holes in the steering
shaft flange.
4. Install and tighten the steering gear to frame bolts.
5. Install the coupling to flange bolt nuts and washers
and torque to specifications. Be sure to maintain a coupling
to flange dimension of .250" to .375". The coupling
alignment pins should be centered in the flange slots.
INTERMEDIATE STEERING SHAFTS W IT H POT
JO IN T COUPLINGS
Removal (Fig. 3B4-23)
1. Remove the lower shaft flange to flexible coupling
bolts.
2. Remove upper shaft to intermediate coupling bolt.
3. If necessary, remove the steering gear to frame bolts
and lower the steering gear far enough to remove the
intermediate shaft assembly. It is not necessary to remove
STEERING CO LUM NS
F ig . 3 B 4 - 2 4 ~ C h e c k i n g C o u p lin g P in C e n t e r in g
the pitman arm from the pitman shaft.
Disassembly
1. Mark cover to shaft relationship. Pry off snap ring
and slide cover from shaft.
2. Remove bearing blocks and tension spring from
pivot pin.
3. Clean grease off pin and end of shaft. Scribe location
mark on pin on same side as chamfer in shaft.
4. Supporting shaft assembly securely, with chamfer
up, press pin out of shaft with arbor press.
Do not drive pin out with hammer. This
NOTICE:
could cause sticky or binding bearings
reassembled.
5. Remove seal clamp and slide seal off end of shaft.
Assembly
1. Be sure all parts are free of dirt. Slide seal onto
steering shaft. With lip of seal against step in shaft clamp
seal.
2. Press pin back into shaft from chamfered side.
Locate pin in shaft using scribe mark as reference.
Pin must be centered within .012 in. or
NOTICE:
binding in the coupling could result.
3. Check centering of pin (Fig. 3B4-24).
a. Place just enough 3/8" flat washers on pin to
prevent bearing block from bottoming when installed.
b. Measure distance from end of pin to top of bearing
with micrometer.
3B 4-19
when
LIG H T T R U C K SER V IC E M ANUAL