SPEED CONTROL
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
41
SPEED CONTROL
Figure 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.
Hardware that is removed must be installed in its
original position unless otherwise specified. If the
torque values are not specified, refer to the Torque
Specifications table in the GENRAL INFORMATION
AND ROUTINE MAINTENANCE section.
To decrease the risk of possible injury or
death, follow the lifting procedure in SAFETY
section. 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 supported by a jack alone.
SYSTEM OPERATION
Pedal Box Operation
When you press the accelerator, the accelerator rod
moves towards the rear of the vehicle by overcoming the
resistance of the accelerator return spring (Figure 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 Operation
Until the vehicle reaches its governed speed, the vehicle
will continue to accelerate in relation to the accelerator
pedal position.
9TTIV
+SZIVRSV0IZIV
0S[IV
+SZIVRSV0IZIV
+SZIVRSV
7TVMRK
%GGIPIVEXSV'EFPI
8LVSXXPI6SH
'EVFYVIXSV
4IHEP%WWIQFP]