3-19
Controls and Operating
Transmission
This machine is equipped with a CEC (Commercial Electronic Control) shift sys-
tem, to operate the transmission. The CEC shift system continually
monitors the transmission and shift system electrical components and warns
the operator when a problem develops. It also takes action to prevent damage to
the transmission, and provides the serviceman with diagnostic capabilities so
that problems can be corrected quickly and easily.
NOTE : Before any welding is done on a machine equipped with a
CEC shift system, disconnect battery equalizer ground cables, bat-
tery cables from terminal posts (ground cable first), battery equalizer
positive cables and electrical connections at the ECU to avoid dam-
age electrical components. Turn off ignition key switch to
isolate batteries before disconnecting any components.
In addition, CEC provides the following systems designed to protect the
operator and mechanical components:
REVERSE INHIBIT
Prevents gear selection if engine is operating at more than 20% throttle.
HOIST INTERLOCK PRESSURE SWITCH
The ECU will shift the transmission from Reverse to Neutral if the body control
lever is moved to the 'Raise' position. When this circuit has been activated,
moving the transmission shift lever to Neutral, the re-selecting Reverse, will en-
gage Reverse gear whilst the body is held in the 'Raise' position. This feature is
only operational in the normal automatic driving mode, either power or economy.
It is not activated during the manual mode.
NOTE : The standard procedure for raising the body must still be
adhered to.
BODY UP INTERLOCK
When the body is raised, the CEC system will only allow the transmission to
operate in First gear. This feature is only operational in the normal automatic
driving mode, either power or economy. It is not activated during the manual
mode.
PARKING
BRAKE INTERLOCK
If the parking brake control switch is applied while the transmission is in Neutral,
the CEC system will prevent a shift out of Neutral to protect the brake
components. If the parking brake control switch is applied while the transmis-
sion is in gear, the parking brake interlock will not function and normal shifts will
occur.
Summary of Contents for TR100
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