Chevrolet 1980 Light Duty Truck Service Manual page 265

STEERING GEAR RATIOS
Manual
Vehicle
Gear
Ratio
24:1
G 10-20
24:1
G30
P10 24:1
P20-30 24:1
Motor Home -
C 10 24:1
24:1
C20-30
K 10-20 24:1
Vehicle
C10-30
G 10-20
G30
P10-30
Motor Home & K
SPECIFICATIONS
Power
Overall Gear
Overall
Ratio
Ratio Ratio
29.4:1
21.4:1
14:1
to
to
36.7:1 26.7:1
21.4:1
29.4:1
to to
14:1
36.4:1 26.5:1
21.2:1
29.1:1
17.5:1 to
to
25.7:1
35.5:1
21.2:1
29.1:1
17.5:1 to
to
35.3:1 25.7:1
16.0:1
14:1
- to
21.9:1
29.1:1 16:1 16.9:1
to
to to
13:1 20.2:1
37.0:1
29.4:1 17.2:1
16:1
to
to to
20.6:1
36.3:1 13:1
13.2:1
24.6:1 16:1
to
to to
17.2:1
28.0:1 13:1
POWER STEERING PUMP PRESSURES
Fig. 3 B 4 -S p e c s
STEERING C O LU M N S
MANUAL STEERING GEAR
Components
6 to 11
T hrust B earing
lbs. in.
P reload
A d ju ster Plug
L o ck N u t
5 to 11
Over C enter
lbs. in.*
Preload
Over Center
Lock Nut
Total Steering 18 lbs. in.
Gear Preload Max.
*In e x c e ss o f th ru st bearing p reload .
POWER STEERING GEAR
Components
Steering Gear Ball Drag
Thrust Bearing Preload
Adjuster Plug Locknut
Over-Center Preload
Over-Center Adjusting
Screw Locknut
Total Steering Gear Preload
*I n e x ce ss o f ball drag.
* * I n e x c e ss o f ball drag and th ru st bearing preload.
Pressure
1200 - 1300 psi
900 - 1000 psi
1200 - 1300 psi
1200 - 1300 psi
1350 - 1450 psi
3B4-51
C1p1030 K 10-20
P20 - 30
4 to 6
9 to 12
lbs. in. lbs. in.
85 lbs. ft.
4 to 10 9 to 13
lbs. in.* lbs. in.*
lbs. ft.
2 5
14 lbs. in.
25 lbs. in.
Max.
Max.
All C, P, K and G
3 lbs. in. Max.
1/2 to 2 lbs. in.*
80 lbs. ft.
5 in.
lbs.
35 lbs. ft.
14 lbs. in. Max.
LIG H T T R U C K S ER V ICE M AN UAL