Allison-2500-Automatic-Transmission-Driver-Instructions

Allison-2500-Automatic-Transmission-Driver-Instructions
OPERATION
Allison 2500 Series
Driving the Allison 2500 Series Transmission
Allison 2500 Series is a fully automatic transmission, featuring a torque
converter with a lock up clutch and five (5) forward and one (1) reverse
gear ratios.
Procedure - Start Up
1. Ensure the park brake is applied.
2. Turn the ignition key to the ON position and observe that the check
lamp function has momentarily illuminated the SHIFT LIMIT light,
followed by the Automatic Transmission MAINTENANCE light.
3. Ensure the Selector Lever is in the “N” position.
4. Start the engine.
Selecting a Starting Gear and Gear Shifting
1. Depress the brake pedal and with the engine at idle speed, select the
required driving range (‘R’, ‘D’, ‘3’, ‘2’ or ‘1’) and then wait
approximately 1 second for full gear engagement.
2. Set the vehicle in motion by releasing the brake pedal and then the
park brake whilst progressively applying the accelerator pedal.
3. When moving in the forward direction all gear ratio changes are
performed automatically within the parameters of the mode selected.
4. When stopping the vehicle at traffic lights etc. hold the brake pedal
depressed to prevent the vehicle from forward or rearward movement.
Procedure - Shut Down
1. Stop the vehicle and hold the brake pedal depressed.
2. With the engine stabilised to idle speed, select ‘N’.
3. Apply the park brake.
4. Turn the ignition key to the OFF position and release the brake pedal.
Notes:
• Neutral Safety Function: The starter cannot be activated unless the
Selector Lever is in the ‘N’ position.
• Shift Lock System - Selector Lever:
- Release from ‘N’ Position: The ignition key must be in the ON
position and the brake pedal depressed, additionally if the vehicle is
in operation and the ‘N’ position is selected for approximately 5
minutes the brake pedal must be depressed to release the Selector
Lever.
- Ignition Key Removal: The Selector Lever must be in the ‘N’ position.
- Emergency Release: Whilst holding the brake pedal depressed,
simultaneously press the Shift Lock Release Button and move the
Selector Lever to the required driving range.
• Range Shift Limit (engine rpm and road speed) Function: If the ‘N’ to a
driving mode or Forward/Reverse Changeover mode gear selection
parameters are exceeded the SHIFT LIMIT warning light will illuminate.
If this occurs, stop the vehicle, hold the brake pedal depressed and
with the engine at idle speed, select ‘N’ mode and then reselect the
desired driving mode.
• Extended Idling: To prevent overheating of the transmission, always
select ‘N’ if you need to idle the engine for more than 5 minutes.
OPERATION
Allison 2500 Series
OPERATION
Allison 2500 Series
Mode
When pushed once, the indicator light illuminates and the transmission
selects POWER mode. This mode raises the gear shift points under
both light and heavy vehicle acceleration modes.
Note: Excessive use of POWER mode may increase fuel consumption.
Switch Location: On the dash panel to the left of the steering column
and in front of the Selector Lever.
Reverse Mode
“R” mode is used for moving the vehicle rearwards.
When shifting from ‘N’ to ‘R’ mode, the engine must be at idle speed and the brake
pedal depressed holding the vehicle stationary.
Refer notes: Shift Lock System and Range Shift Limit Function.
Neutral Mode
“N” mode is used when starting the engine, warming up the engine, extended idling
periods and when stopped.
When shifting from ‘N’ to a driving range, the engine must be at idle speed and the
brake pedal depressed holding the vehicle stationary.
Refer notes: Shift Lock System, Range Shift Limit Function and Extended Idling.
Driving Mode
“D” mode is the position used for normal forward driving with shifting between
gears done automatically, according to the Overdrive switch position, engine load
and road speed.
Overdrive Switch (O/D)
- ON: Shifting between forward gear ratios 1~5 is done automatically.
- OFF: Shifting between forward gear ratios 1~4 is done automatically and is
used when driving slowly in areas with heavy traffic, or when an additional
amount of engine braking is required on level road surfaces.
Third Range
“3” mode is used when descending inclines and an increase in engine braking
performance is required.
Shifting between forward gear ratios 1~3 is done automatically, according to engine
load and road speed. (#)
Second Range
“2” mode is used when descending steep inclines and a further increase in engine
braking performance is required.
Shifting between forward gear ratios 1~2 is done automatically, according to engine
load and road speed. (#)
First Range
“1” mode is used for manoeuvring the vehicle at low speed, or when maximum
engine braking performance is required.
The transmission selects 1st gear. (#)
Note: (#) Refer “Descending Inclines - Caution”.
Automatic Transmission SHIFT LIMIT
Illuminates under the following conditions, the ECU
prohibits gear shifting for the purpose of protecting the
transmission.
• Engine speed is greater than 1000 rpm when shifting from ‘N’.
• Forward/Reverse Changeover: When the vehicle is moving and
exceeds the specified speed.
• When the ECU receives an abnormal request signal, gear shifting
is limited to protect the transmission from damage.
Engine Overrun WARNING
When the engine rpm exceeds the maximum allowable
rpm, the warning illuminates and a warning buzzer sounds.
• Refer to “DRIVER TIPS - Descending Inclines”.
Automatic Transmission FLUID TEMPERATURE
If the transmission fluid temperature rises above
approximately 121ºC, the warning illuminates and a
warning buzzer sounds.
CAUTION: If the fluid temperature warning is activated, stop the vehicle,
select ‘N’ mode and then operate the engine at 1200~1500 rpm until
the fluid temperature returns to normal. It is also recommended that the
transmission fluid level be checked - refer the Minor Maintenance
section of the vehicle Owner’s Manual.
Automatic Transmission MAINTENANCE
Illuminates when either the transmission fluid or filters
require replacement or general transmission servicing is
required - refer to the vehicle Owner’s Manual, Section 9
“Maintenance Schedule”.
Automatic Transmission WARNING
The warning light illuminates when the transmission ECU
detects a fault in the transmissions operation.
• If illuminated, park the vehicle in a safe place and refer to the
vehicle Owner’s Manual, Section 3 “ATM Warning System”.
NOTE: If any of the above warning lights remain illuminated, contact
your UD Trucks dealer for assistance (ph. 1300 289 283).
DRIVING TIPS
Allison 2500 Series
Exhaust Brake - Performance
When using the exhaust brake to retard the vehicle and increased
engine braking performance is required, use the ‘O/D OFF’ button
position or the ‘3’ or ‘2’ Selector Lever range positions to select
and hold an appropriate gear range. The exhaust brake does not
function when ‘1’ range position is selected.
Exhaust Brake - Interface (optional feature)
MISC. ITEMS
Allison 2500 Series
Optional Feature (contact your UD Trucks dealer for details)
To accommodate special vehicle applications, it is feasible to have the
transmission ECU reprogrammed to include the listed optional feature.
• Exhaust Brake Interface:
Recommended for general duty
cargo/distribution truck, reduces
reliance on the service brakes.
When programmed and the exhaust brake is activated and the
accelerator pedal is in the engine idle position (foot lifted off
accelerator pedal), the transmission will automatically perform
downshifts at a higher road speed increasing the engine braking
performance.
Exhaust brake activated is the recommended driving mode.
Driver Instructions
Allison 2500 Series 5-Speed
Automatic Transmission
Descending Inclines
Taking into consideration the vehicle load and gradient conditions,
use the ‘O/D OFF’ button position or the ‘3’, ‘2’ or ‘1’ Selector
Lever range positions to select an appropriate gear range that in
combination with the exhaust brake and intermittent application of
the brake pedal will maintain a vehicle speed within the engine
governed speed range (up to 2600 rpm).
CAUTION: DO NOT EXCEED THE ENGINE GOVERNED SPEED IN
A LOWER GEAR RANGE AS THE TRANSMISSION MAY UPSHIFT
TO THE NEXT HIGHER GEAR RANGE, RESULTING IN
DIMINISHED VEHICLE CONTROL.
Cruise Control
• Cruise control can only be set or resumed between 35~100 km/h
and when activated, the auto cruise control will continue to function
within its operating range as the transmission automatically changes
gear ratios.
• When driving in auto cruise, cruise control is cancelled when;
a) the vehicle speed drops below approximately 35 km/h or by the
momentary operation of the
b) exhaust brake or
c) brake pedal.
• Once cancelled, it requires the driver to manually reactivate the
cruise control by either pressing the RESUME switch if the original
speed is required or the SET switch once the desired vehicle cruise
speed is attained.
CAUTION: AS THE CRUISE CONTROL IS CANCELLED
AUTOMATICALLY WHEN THE VEHICLE SPEED DROPS BELOW
APPROXIMATELY 35 KM/H THE VEHICLE MAY LOSE ROAD
SPEED RAPIDLY.
WHEN CLIMBING HILLS IT IS RECOMMENDED THAT THE
DRIVER OVERRIDE THE CRUISE CONTROL BY APPLYING
PRESSURE TO THE ACCELERATOR PEDAL.
Power Take Off (PTO)
When equipped with a transmission PTO, ensure that the PTO
manufacturer’s operating instructions are adhered to.
UD Trucks
120 Hume Highway
CHULLORA NSW 2190
Pub. No. AUS000449
Aug-11
© Volvo Group Australia Pty Ltd ABN 27 000 761 259
MK 11 250
PK 16 250
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