Gear Pre-Selection - Bell B40C 6X6 Operator's Manual

Articulated dump truck
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Use this gear when pulling through mud and
1
deep snow, when manoeuvring in tight spaces
or while driving up /down grades.
1st gear provides the machine with maximum
driving torque and maximum engine braking ef-
fect.
Push the ↓ (Down) arrow button on the shift se-
lector until first gear appears on the display
screen.
1
When selecting D from N and the bin is raised
(bin raised warning indicator is illuminated), the
transmission will limit gear selection to 1st
gear. The display on the shift selector will show
"1".
As soon as the bin is fully lowered (bin raised
warning indicator is extinguished), the trans-
mission will automatically revert to normal gear
selection and the gear shift screen will revert to
the original display.
Reverse operation of the machine is not af-
R
fected by the bin raised condition (as described
above).
When retarding, (i.e.. The operator takes his
2
foot off the accelerator) the transmission will
start downshifting from the current gear, down
to 2nd gear to maximise engine braking.
The gear shift display will show "2" as long as
retardation is in progress and will revert back to
the original displayed value when:
- 2nd gear is attained and the machine has
slowed down to almost a stop
- or when the operator applies the accelerator
to cancel retardation.
The engine exhaust brake is automatically ap-
plied and the exhaust brake warning indicator
is illuminated during the above retardation pe-
riod.
38
GEAR
The range hold switch (next to the shift
selector) allows the operator to hold the
(RANGE)
transmission in a gear of his choice to
HOLD
improve cycle time in abnormal operat-
ing conditions.
When the switch is actuated, the gear
that the transmission is in at the time, will
be "held".
No upshifting will happen beyond this
gear (except in overspeed conditions)
but downshifting is allowed.
The "held" gear is displayed on the shift
selector.
When the range hold switch is switched
OFF, normal gear selection (upshift-
ing) will continue and the display will
show the original value.
MODE
MODE, is used to select between Per-
formance
modes.
MODE, is also used in diagnosis
code reading. Refer to Trouble-
shooting at the end of this manual.
Note: The Performance mode is the
typical mode for normal operating and
the Economy mode would be selected
for on-road driving.

Gear Pre-selection

Gear pre-selection means selecting a lower gear to
match driving conditions which the operator encoun-
ters or expects to encounter.
Learning to take advantage of pre-selected shifts will
give the operator better control on slick or icy
surfaces and on downgrades.
Downshifting to a lower gear increases engine brak-
ing.
The selection of a lower gear often prevents cycling
between that gear and the next higher gear on a se-
ries of up-and-down gradients.
and
Economy
program
870984-01
June 1, 1999

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