Chevrolet 10 Series 1967, Service Manual

Page: 328 / 605

ENGINE FUEL 6M-4
1. Depress accelerator pedal to floor.
2. Hold carburetor throttle lever in wide open throttle
position.
3. Adjust threaded swivel on throttle control rod until it
freely enters hole in throttle lever.
Mode/s:
CS-M S-SS 40-50-60, PS 20-30
1. Depress accelerator pedal to floor.
2. Hold carburetor throttle lever in wide open throttle
position.
3. Adjust swivel on accelerator control rod until it
freely enters hole in accelerator pedal lever.
M odels: GS 10-20, PS 40
1. Depress accelerator pedal to floor.
2. Hold carburetor throttle lever in wide open throttle
position.
3. Adjust swivel on accelerator control rod until it
freely enters hole in accelerator control lever.
M odels: TE-TS 40-50-60
1. Depress accelerator pedal to floor.
2. Hold carburetor throttle lever in wide open throttle
position.
3. Install accelerator control cable assembly with
sleeve tube nut and ball joint sleeve into ball joint
and tighten sleeve tube nut.
Mode/s: CD 50-60,
CT 40, M D 50, PT 20-30
1. Depress accelerator pedal to floor.
2. Hold governor lever in wide open throttle position.
3. Adjust swivel on accelerator control rod until it
freely enters hole in accelerator pedal lever.
Mode/s:
CG-M G-TG 50-60
1. Depress accelerator pedal to floor.
2. Hold governor lever in wide open throttle position.
3. Adjust swivel on accelerator control rod until it
freely enters hole in governor control lever.
M odels: TD 50-60, TT 40
1. Depress accelerator pedal to floor.
2. Hold governor lever to wide open throttle position.
3. Install accelerator control cable assembly with
sleeve tube nut and ball joint sleeve into ball joint
and tighten sleeve tube nut.
GOVERNORS
INDEX
Page
Velocity T y p e .................................................................. 6M-4
General D escrip tion ................................................... 6M-4
Maintenance and A djustm en ts.................................... 6M-5
Adjustments ......................................................... 6M-5
Vacuum Spinner Type - 2G C a r b u r e t o r s ........................ 6M-5
Page
General D e s c r ip tio n ................................................... 6M-5
Major Service O p e r a t io n s .......................................... 6M-6
Control V a l v e ......................................................... 6M-6
Governor H ousing................................................... 6M-6
Trouble Shooting......................................................... 6M-7
ENGINE GOVERNOR (VELOCITY TYPE)
GENERAL DESCRIPTION
A velocity type governor is used as optional equipment
on 230, 250, 292 and 283 truck engines.
The governor is mounted between the carburetor and
the intake manifold and automatically governs the maxi­
mum speed at which the truck engine may be operated,
which in turn limits the maximum speed at which the
vehicle may be operated.
The governor (fig. 1G) is operated by the vacuum exist­
ing in the intake manifold under varying conditions of
engine operation and the flow of air past the governor
valve. A shaft carried on a needle type roller bearing
extends through the body of the governor and this shaft is
offset from the center line of the throat. On the shaft is
mounted a throttle plate or throttle valve. The valve is
slightly offset on the shaft and in its wide open position is
about 10 degrees from the vertical (fig. 1G).
The gas mixture rushing from the carburetor through
the governor throat strikes the offset throttle valve and
tends to draw it closed. This action is opposed by a
governor spring which is attached to the valve shaft
through a cam ribbon and cam. By adjusting the pull of
this spring, the governor valve can be made to remain
open, and then closed at a predetermined engine speed.
Adjustment of the spring pull is accomplished by changing
the number of spring coils operating by turning the ad­
justment cap.
Fig . 1G - Diagrammatic V ie w of Governor for 6 -C y lin d e r Engine
THROTTLE SHAFT THROTTLE SHAFT
NEEDLE TYPE
ROLLER BEARING
-I—
ADJUSTING
SCREW
STABILIZER (NON-CHEATING)
PISTON AND ROD
GOVERNOR
THROTTLE VALVE
ADJUSTING
GOVERNOR
SPRING ADJUSTING
SCREW
BUSHING
CAM RIBBON
CHEVROLET TRUCK SERVICE MANUAL