Chevrolet 1980 Light Duty Truck Service Manual page 250

3B4-36 STEERING CO LUM NS
BEARING
Fig. 3B 4 -61 ~ S tee rin g S haft Interm ediate C oupling
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.
NOTICE: The bolt must pass through the shaft
undercut,or damage may 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.
INTERM EDIATE STEERING SHAFTS W IT H POT
J O IN T COUPLINGS
Removal (Fig. 3B4-61)
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
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:
Fig. 3B 4-62--C hecking C o up lin g Pin Centering
may cause sticky
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.
NOTICE: Pin must be centered within .012 in. or
binding in the coupling could result.
3. Check centering of pin (Fig. 3B4-62).
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.
c. Remove bearing and washers and place same bearing
and washers on other end of pin. Measure distance from end
of pin to top of bearing. If micrometer readings in Steps b
and c differ more than .012, repeat last part of Step 2 and
recheck.
4. Apply a liberal amount of wheel bearing grease to
inside and outside of bearing blocks and inside of cover.
5. Position tension spring and bearing blocks on pin.
6. Slide cover over bearing blocks aligning reference
mark on cover with mark on shaft. Install seal into end of
cover and secure with snap ring retainer.
or binding bearings when
LIG H T T R U C K S E R V IC E M AN UAL