Chevrolet 70 1969 Series, Shop Manual

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STEERING 9-2
19 18 17
1 Lash Adjuster Lock Nut
2 Side Cover Bolt
3 Side Cover
4 Side Cover Gasket
5 Back-Up Adjuster Lock Nut
6 Back-Up Adjuster
7 Clamp Retainer Screw
8 Pitman Shaft Bearing
9 Oil Seal
10 Pitman Arm Nut
11 Lock Washer
12 Pitman Shaft Arm
13 Pitman Shaft
14 Steering Gear Housing
15 Pitman Shaft Sector Gear
16 Lash Adjuster Washer
17 Pitman Shaft Bearing
18 Lash Adjuster Retainer
19 Lash Adjuster
20 Steering Shaft
21 Oil Seal
22 Housing Upper Cover
32 29
23 Upper Worm Thrust Bearing
24 Ball Nut Stop
25 Worm Shaft
26 Ball Nut
27 Ball Guide
28 Lower Worm Thrust Bearing
29 Drain Plug
30 Adjuster Shims
31 Filler Plug
32 Lower Thrust Bearing Cone
33 Upper Thrust Bearing Cone
TPM-60 U
-1
F ig u re 2 — T y p e 5 6 8 0 S te e rin g G e a r (T yp ica l)
taching Pitm an arm to Pitm an shaft; then using spe­
cial puller (J-3186) or other suitable puller, remove
Pitm an arm from shaft (fig. 3).
3. Remove filler and drain plugs and drain as m uch lu­
bricant from the housing as possible.
4. Remove lock nut from lash adjuster screw.
5. On all steering gear assemblies having a back-up ad-
F ig u re 3 — R e m o v in g P it m a n A r m - S te e rin g G e a r R e m o v e d (T y p ic a l)
juster, loosen lock nut; then remove back-up adjuster
and lock nut.
6. Remove side cover to housing attaching bolts and
lock washers; then remove side cover by turning the
lash adjuster screw clockwise through side cover. R e­
move and discard side cover gasket.
7. M ake sure w orm shaft is horizontal and turn shaft as
necessary to position sector gear on Pitm an shaft so it
will pass through housing opening. Rem ove Pitm an
shaft from gear housing.
NOTE: Horizontal position of worm shaft is ne­
cessary to prevent ball nut from running down
to end of worm, as Pitman shaft is withdrawn,
thereby damaging ball return guides.
NOTE: Disassembly procedures for the various
type steering gear assemblies differ at this
point. Refer to applicable procedures described
under separate headings following for each
type steering gear.
TYPE STEERING GEAR SHOWN IN FIGURE 1
ONLY
1. Rem ove w orm thrust bearing adjuster lock nut; then
remove cup and thrust bearing adjuster assembly. Remove
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L