Chevrolet Light Duty Truck 1973 Service Manual page 176

3-2 FRONT SU S PEN SIO N
Steering Knuckle/Steering Arm......................................... .3-25
Removal...............................................................................3-26
Installation...........................................................................3-26
Crossmember and Suspension Unit.....................................3-26
Removal...............................................................................3-26
Installation...........................................................................3-26
Diagnosis................................................................................. .3-27
The GM 10-30 series Truck line except K Series
incorporates an independent coil spring front suspension
system. (Figs. 1 and 2).
The control arms are of unequal length (S.L.A. Type)
and is used on all 10, 20 and 30 series vehicles without 4
wheel drive.
This suspension system consists of upper and lower
control arms pivoting on steel threaded or rubber
bushings on upper and lower control arm shafts. The
lower control arms are attached to the crossmember with
Front Suspension..................................................................3-27
Ball Joint............................................................................... .3-30
Shock Absorber.................................................................... .3-31
On Vehicle...........................................................................3-31
Bench....................................................................................3-32
Bearings and Races................................................................3-33
Special Tools............................................................................3-37
GENERAL DESCRIPTION
U-bolts. The upper control arms are attached to a frame
bracket. These control arms are connected to the steering
knuckle through pivoting ball joints.
A coil spring is located between the lower control arm
and a formed seat in the suspension crossmember, thus
the lower control arm is the load carrying member.
Double acting shock absorbers are also attached to the
lower control arms and connect with the frame to the
rear on the upper end. The front wheel bearings are
tapered roller type and are used on all models.
Fig. 1—Front Suspension - G-30— Typical
LIGHT DUTY TRUCK SERVICE MANUAL