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TMS9000-2 OPERATOR MANUAL OPERATING PROCEDURES
Published 02-21-2019, Control # 611-05
LOW Mode
LOW mode should be used to maximize engine braking and
minimize the use of the brake pedal. For example, when
driving down long grades or when coming to a stop.
• Selects lowest available gear for start gear. (see Note).
The starting gear cannot be changed in LOW mode.
• If LOW is selected while moving, the transmission will
not upshift (except for the Transmission Override
conditions noted below). The transmission system will
downshift at the earliest opportunity to provide maximum
engine braking.
Transmission LOW Override
If the vehicle is being back driven and the engine is
approaching a higher than normal level, the transmission
system will override the MANUAL position and perform an
upshift.
NOTE: At higher engine speeds additional engine braking
in LOW Mode could cause a loss of traction when
on slippery surfaces.
NOTE: LOW is the only means to achieve the curbing gear
or 1st on the UltraShift PLUS Vocational
Multipurpose Series (VMS) mixer models.
NOTE: If the driver attempts to select a non-neutral mode
without depressing the service brakes the
transmission will not shift into gear and the driver
will have to return to Neutral and depress the
brakes before selecting the desired mode again.
Hill Start Aid (HSA) (Optional-Only available with
automated transmission)
Prevents vehicle from rolling in an unintended direction for
up to 3 seconds when launching vehicle on a grade.
Hill Start Aid defaults to the “On” position. It can be turned
“Off” for a single launch by pressing and releasing the Hill
Start Aid switch, refer to “Hill Start Aid (HSA) Switch
(Optional)” on page 3-7.
When stopped on an incline, the Bendix system will apply the
brakes on the rear axles. When you begin to pull away again,
it will keep the brakes applied until the transmission tells the
Bendix system to release them. The transmission won’t tell
Bendix to release the brakes until it senses the engine has
produced enough torque to pull up the incline without drifting
backwards. This is done to protect the drivetrain components
downstream of the transmission.
CAUTION
The transmission initiates upshifts from MANUAL and
LOW for engine over speed protection. Some engines do
not use the Eaton engine overspeed protection.
CAUTION
If the driver depresses and holds both pedals (even if
done accidentally) the launch will be abrupt and the
engine and brake forces may rock and bounce the
vehicle. Releasing either pedal will stop this immediately.
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