Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual page 239

3B4-4 STEERING CO LUM NS
Instrument Panel Bracket Capsule Damage
NOTE: The bolt head must not contact surface " A " . If
contact is made, the capsule shear load will be increased. If
this condition exists replace the bracket.
LOCK SYSTEM-WILL NOT UNLOCK
Cause
A. Lock bolt damaged.
B. Defective lock cylinder.
C. Damaged housing.
D. Damaged or collapsed sector.
E. Damaged rack.
F. Shear Flange on sector shaft collapsed.
LOCK SYSTEM- WILL NOT LOCK
Cause
A. Lock bolt spring broken or defective.
B. Damaged sector tooth, or sector installed incorrectly.
C. Defective lock cylinder.
D. Burr or lock bolt or housing.
E. Damaged housing.
F. Transmission linkage adjustment incorrect.
G. Damaged rack.
H. Interference between bowl and coupling (tilt).
I.
Ignition switch stuck.
J.
Actuator rod restricted or bent.
LOCK SYSTEM - HIGH EFFORT
Cause
A. Lock cylinder defective.
B. Ignition switch defective.
C. Rack preload spring broken or deformed.
D. Burrs on sector, rack, housing, support, tang of shift gate
or actuator rod coupling.
E. Bent sector shaft.
F. Distorted rack.
G. Misalignment of housing to cover (tilt only).
LIG H T TR U CK SER V IC E MANUAL
AUTOMATIC TRANSMISSION COLUMNS
Fig. 3B 4-3~ A utom atic Transm ission Column Diagnosis Chart A
Solution
A. Replace lock bolt.
B. Replace or repair lock cylinder.
C. Replace housing.
D. Replace sector.
E. Replace rack.
F. Replace.
Solution
A. Replace spring.
B. Replace, or install correctly.
C. Replace lock cylinder
D. Remove Burr.
E. Replace housing.
F. Readjust (see Sec. 7).
G. Replace rack.
H. Adjust or replace as necessary.
Readjust or replace.
I.
J. Readjust or replace.
Solution
A. Replace lock cylinder.
B. Replace switch.
C. Replace spring.
D. Remove Burr.
Replace shaft.
E.
F. Replace rack
Replace either or both.
G.
SURFACE "A'
i