SPEED CONTROL
Page F-1
Repair and Service Manual
Read all of Section B and this section before attempting any procedure. Pay particular attention to all Notices, Cautions, Warnings and Dangers.
Fig. 1 Accelerator and Speed Control System
The linkages that control the accelerator mechanism, governor
and carburetor are designed to operate as an integrated
assembly. Any adjustment to one portion of the system will
have an effect on the other components within the system. In
the following text, there are references to removing and install-
ing bolts and other fasteners. Additional hardware (nuts, wash-
ers, etc.) that are removed must always be installed in their
original positions unless otherwise specified. Non-specified
torques are shown in the table in Section A.
To prevent possible injury or death, follow the
lifting procedure in Section B of this manual.
Place wheel chocks in front and behind the
rear wheels. Check the stability of the vehicle
on the jack stands before starting any repair
procedure. Never work on a vehicle that is sup-
ported by a jack alone.
SYSTEM OPERATION
Pedal Box Operation
As the accelerator pedal is depressed, the accelerator
rod moves towards the rear of the vehicle by overcom-
ing the resistance of the accelerator return spring (Ref
Fig. 1).
As the accelerator pedal moves, the parking brake is
released, the micro switch closes and activates the igni-
tion circuit.
The rear end of the accelerator rod is joined to the micro
switch cam which connects to the accelerator cable.
As the micro switch cam moves to the rear it pulls the
accelerator cable, which pulls against the governor
spring.
When the accelerator cable pulls against the accelerator
cable/governor spring, the spring extends until it over-
comes the resistance exerted by the governor mecha-
nism. As the governor spring overcomes these forces,
the governor arm moves and the motion is transferred
through linkage rod to the carburetor throttle plate.
Governor Lever - Upper
Governor Lever - Lower
Governor
Spring
Accelerator
Compression
Spring
Accelerator Cable
NOTICE
