3-353-35
should modify throttle position, or gear held to achieve a steady road speed withshould modify throttle position, or gear held to achieve a steady road speed with
the torque converter lockup engaged (Indicator Light 'Off'). The Lockup relay inthe torque converter lockup engaged (Indicator Light 'Off'). The Lockup relay in
the interface box is also activated by the 20 bar (290 psi) pressure switch on thethe interface box is also activated by the 20 bar (290 psi) pressure switch on the
foot brake pedal. When this switch is activated the converter in light will befoot brake pedal. When this switch is activated the converter in light will be
illuminated due to the transmission dropping out of converter lock up, avoidingilluminated due to the transmission dropping out of converter lock up, avoiding
engine stall.engine stall.
9. Digital Data Line -9. Digital Data Line -Located in the right hand side of the transmission controlLocated in the right hand side of the transmission control
tower. Plug in connector for diagnostic data reader (DDR).tower. Plug in connector for diagnostic data reader (DDR).
10. Transmission Overspeed Light -10. Transmission Overspeed Light - Illuminates when the transmission ECUIlluminates when the transmission ECU
senses transmission speed above 2350 rev/min.senses transmission speed above 2350 rev/min.
GENERAL TRANSMISSION OPERATIONGENERAL TRANSMISSION OPERATION
WatchWatch
for wide deviations from normal readings on the transmission oilfor wide deviations from normal readings on the transmission oil
temperature gauge during machine operation. If the transmission oiltemperature gauge during machine operation. If the transmission oil
temperature gauge, on vehicles which do not have a transmission retarder fitted,temperature gauge, on vehicles which do not have a transmission retarder fitted,
shows oil temperature consistently rising above the green zone (43 - 135° C;shows oil temperature consistently rising above the green zone (43 - 135° C;
100 - 275° F) under normal operating conditions; check for external causes. If100 - 275° F) under normal operating conditions; check for external causes. If
none are evident shift to Neutral (N) and operate the engine at 1 200 - 1 500 rev/none are evident shift to Neutral (N) and operate the engine at 1 200 - 1 500 rev/
min. If the transmission oil temperature does not decrease into the green zonemin. If the transmission oil temperature does not decrease into the green zone
within 2 or 3 minutes, the cause of the overheating should be corrected beforewithin 2 or 3 minutes, the cause of the overheating should be corrected before
the machine is operated further. Watch the oil temperature gauge whenthe machine is operated further. Watch the oil temperature gauge when
operating on upgrades, also. If the oil temperature goes into the red zone (135 -operating on upgrades, also. If the oil temperature goes into the red zone (135 -
176° C; 275 - 350° F), select the range which will limit upshifts to the highest176° C; 275 - 350° F), select the range which will limit upshifts to the highest
range in which the transmission will operate within the normal temperaturerange in which the transmission will operate within the normal temperature
range. If upshifting must be consistently limited to ranges lower than normal forrange. If upshifting must be consistently limited to ranges lower than normal for
the loads and the grades encountered to prevent overheating the transmissionthe loads and the grades encountered to prevent overheating the transmission
oil, the causes should be determined and corrected. On vehicles fitted with aoil, the causes should be determined and corrected. On vehicles fitted with a
transmission retarder, it is permissible to operate with the gauge showing in thetransmission retarder, it is permissible to operate with the gauge showing in the
yellow zone, during operation of the transmission retarder.yellow zone, during operation of the transmission retarder.
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