G 20 3/4 Ton Van V8-305 5.0L VIN H 4-bbl (1984)
Brake Proportioning/Combination Valve: Technical Service Bulletins
Height Sensing Brake Proportioning Valve - Setting
Number:
84-120
Section:
5 (V)
Date:
April, 1984
Subject:
HEIGHT SENSING BRAKE PROPORTIONING VALVE SETTING PROCEDURE
Model and Year:
1984 "C-K-G" 20-30 SERIES TRUCKS
TO:
ALL CHEVROLET DEALERS
This bulletin is being published to provide the proper procedure to be followed in setting the height sensing brake proportioning valve on applicable
vehicles.
This procedure must be followed whenever an existing valve and/or the linkage is disassembled or removed to insure proper valve operation.
1.
Raise vehicle, axle must be allowed to hang free (no load condition).
Figure No. 1 - Lever Assembly
2.
Remove nut and disengage lever assembly from valve shaft (Figure #1).
3.
Select appropriate plastic adjustment gauge shown in chart below that is available from WDDGM:
ADJUSTMENT GAUGE USAGE
P/N
Code
Color
Vehicle Combination
14061394
A
Green
"C/K" 30 With G52
14061395
B
Black
C30 Less G52
C20 All K20903 G31305/06 With LE3/LS9
14061396
C
Blue
K30 Less G52
K20906 G31305/06 With LL4/LT9
(RPO G52: Extra Capacity Rear Spring)