Chevrolet 70 1969 Series, Shop Manual

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FRONT SUSPENSION 3B-7
F090, FI 10, FI 20
1 Knuckle Upper Bushing
2 King Pin Bushing
3 Upper Dust Cap
4 King Pin Nut
5 Dust Cap Gasket
6 Spacer
7 Spacing Washer
8 King Pin
9 Knuckle Lower Bushing
Retaining Ring
10 Knuckle Lower Bushing
11 Thrust Bearing
12 Knuckle
13 Lower Expansion Plug
14 Expansion Plug Lock
T -2 8 8 8
Figure 3— Steering Knuckle Construction IF 150 and F 160 Axles ShownI
key is retained in place by a lock washer and nut.
Steering knuckles are equipped with Delrin bush­
ings. Upper and lower ends of knuckles are sealed
with king pin bearing caps and gaskets and an O-
ring seal at the bottom of upper bushings, to pre­
vent lubricant leakage and to exclude dirt and
moisture. The vertical thrust loads are carried by
thrust bearing installed between lower face of axle
center and steering knuckle lower yoke.
R E M O V A L
1. Jack up axle and remove hubs and bearings
as directed in " F R O N T HUBS A N D BE A R IN G S"
(SEC. 3D). Remove brake backing plate from steer­
ing knuckle. Remove tie-rod as directed in S T E E R ­
ING S Y S T E M (SEC. 9) of this manual.
2. Remove steering arm from steering knuckle
3. Remove king pin draw key nut and washer.
Thread nut on draw key far enough to protect
threads. Strike nut with hammer to loosen draw
key. Remove nut, then drive pin out with brass
drift and hammer.
4. Remove cap screws attaching upper and
lower king pin bearing caps and gaskets to steer­
ing knuckle, then remove caps and gaskets.
5. Using brass drift and hammer drive king
pin out of axle.
6. Remove steering knuckle thrust bearing,
shims, and O-ring.
7. Refer to "Inspection and Repair" later in
this section for inspection and repair procedure.
IN S T A L L A T IO N
1. Before assembly, thoroughly clean all parts;
then coat king pin with light coat of S .A .E . 10 en­
gine oil.
2. Position steering knuckle on axle, then in­
sert the thrust bearing into place.
3. Install a new O-ring seal at bottom of upper
bushing.
4. Align king pin holes in steering knuckle
yoke, axle end, and thrust bearing; then partially
install king pin through top.
5. With axle center held firmly, place a jack
under steering knuckle; then raise until all clear­
ance between knuckle lower yoke, thrust bearing
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L