DAF LF45, LF55 Series. Manual — part 255

©

200508

1

Contents

ALLISON 1000 & 2000 AUTOMATIC GEARBOXES

ΛΦ45/55 series

3

7

7 Allison 1000 & 2000 automatic gearboxes

CONTENTS

Page

Date

1.

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200508
1.1

System description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200508

2.

DESCRIPTION OF COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200508
2.1

Selector lever. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200508

2.2

Selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200508

3.

INSPECTION AND ADJUSTMENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200508
3.1

Checking oil level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200508

3.2

Inspecting and adjusting selector cable. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 . . . . . 200508

4.

REMOVAL AND INSTALLATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200508
4.1

Removing and installing entire gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200508

4.2

Removing and installing selector switch . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 . . . . . 200508

4.3

Removing and installing output shaft oil seal . . . . . . . . . . . . . . . . . . . . . . 4-5 . . . . . 200508

4.4

Removing and fitting selector shaft oil seal . . . . . . . . . . . . . . . . . . . . . . . . 4-6 . . . . . 200508

4.5

Removing and installing oil filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 . . . . . 200508

5.

DRAINING AND FILLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200508
5.1

Draining and filling gearbox . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200508

ALLISON 1000 & 2000 AUTOMATIC GEARBOXES

2

©

200508

Contents

7

ΛΦ45/55 series

3

©

200508

1-1

General

ALLISON 1000 & 2000 AUTOMATIC GEARBOXES

ΛΦ45/55 series

3

7

1. GENERAL

1.1 SYSTEM DESCRIPTION

The Allison 1000 and 2000 series of automatic

gearboxes are completely automatic,

electronically controlled gearboxes.

The automatic gearboxes have five forward gears

and one reverse gear.

Design
The different gears are engaged by using three

planetary systems and five lamella clutches

driven by the electronic unit.

The electronic unit receives signals from the

push-button selector block, the selector switch,

the accelerator pedal and several speed sensors.

On the basis of these signals the electronic unit

computes the ideal switching moment.

The torque converter in the automatic gearbox is

fitted with a " lock-up". Under certain

circumstances the "lock-up" provides a rigid link

between the pump and the turbine. As a result,

slip losses from the torque converter are

overcome. This results in lower fuel consumption.

Starting
To start the vehicle, the gearbox must be in the

neutral position. If the gearbox is in a forward

gear or in reverse, the vehicle cannot be started.

ALLISON 1000 & 2000 AUTOMATIC GEARBOXES

1-2

©

200508

General

7

ΛΦ45/55 series

3

Faults
If the electronic unit in the automatic gearbox

registers a fault, a warning will be activated.

If the vehicle is started during an active warning,

the electronic unit will lock the automatic gearbox

in the neutral position. The automatic gearbox will

no longer respond to gear-lever movements from

the neutral position.

If a fault occurs while driving, a warning is

activated. The electronic unit decides whether the

automatic gearbox:

-

is locked in the gear in which the fault

occurred;

-

is restricted as regards changing up and

down;

-

ceases to respond to changes from the

selector lever;

-

ceases to respond to changes from the

selector lever from the neutral position.

During a fault changes of direction may no longer

be possible.

During a fault the vehicle can be brought to a halt

in a safe place. When the ignition is switched off,

the automatic gearbox is locked in the neutral

position.

Towing
To tow a vehicle, the prop shaft must be detached

at the rear axle. It is also possible to remove the

axle shafts. As oil can be lost in this process, it

must be avoided as much as possible owing to

environmental concerns.

Towing the vehicle without taking

the above into consideration may

lead to serious damage to the

gearbox.

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