SRT55D Off-Highway Truck
3-31
Safety, Operation and Maintenance Manual
Controls and Operating
is turned to position '1' to provide a bulb
and system check and should go 'Off' a few
seconds after the engine is started and the
transmission oil pressure rises.
The check trans warning light will come 'On'
during operation if the ECU has detected
a minor fault in an electrical component or
abnormal transmission oil temperature. If
transmission oil temperature is too high, stop
the machine, select Neutral (N), and increase
engine speed to allow a greater flow of oil
to the oil cooler until oil temperature drops
to normal operating range. In most cases, a
minor fault triggering the check trans warning
light will not prevent normal operation from
continuing but, depending on the nature of
the problem, the ECU could take action to
protect the transmission from damage, such
as preventing operation in high gear ranges.
If the ' check trans ' warning light comes on,
have the problem diagnosed and corrected at
the earliest opportunity.
warning
Do n ot o p e rate eng i n e f o r m o r e
than 30 seconds at full throttle with
transmission in gear and output stalled
as this will result in severe overheat
damage to the transmission.
3.13.3 General transmission operation
Watch for wide deviations from normal
readings on the transmission oil
temperature gauge during truck operation. If
the transmission oil
temperature gauge, on vehicles which do not
have a transmission retarder fitted, shows
oil temperature consistently rising above
the green zone (65 - 135°C; 149 - 275°F)
under normal operating conditions; check
for external causes. If none are evident
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