Remove/install SCR frame module control unit

AR14.40-B-2020TC

Remove/install SCR frame module control unit

18.10.2019

Engine

457 in model 958.434/441/443/444/452/453/454

Engine

457.910 in model 958.431/451/471/472/478

Engine

457.911 in model 695.023/053

Engine

460.984 in model 934

Engine

924 in model 694.000/042

Engine

924 in model 958.0/1, 979.023/026/028/073/076/078

Engine

926.9 in model 693.298/328/388, 695.010/011/304

Engine

926.9 in model 958.0/1

Engine

926.9 in model 958.2

Represented in model 958.2 /4

1

Support

2

Electric connection

A95

SCR module

Represented in model 979.0

A95

SCR module

 

Remove/install

1

Turn off ignition

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

 Danger

Risk of fire/risk of explosion due to short circuit and escaping oxyhydrogen gas. Risk of (burn) injury caused by caustic burns to eyes, skin and mucous membranes from battery electrolyte/mist, short circuit and arcing. Risk of poisoning caused by swallowing battery electrolyte or absorption of lead through the skin or body orifices. Risk of death due to voltage U >= 30 V AC and U >= 60 V DC.

No fires, sparks, open flames, or smoking. Wear acid-resistant gloves, clothing, and glasses. Pour battery acid only into suitable and appropriately marked containers.

AS54.10-Z-0001-01A

2

Disconnect the negative battery cable

Topical note

Notes on battery

AH54.10-P-0001-01A

 When a main switch is provided, turn it off before disconnecting the battery cable.

3

Remove the SCR module (A95) from the bracket (1)

the model 979.0, the SCR module (A95) is located between the right-hand stringer and the batteries.

 Engine 924.9, 926.9SCR control module - Chassis module on support

*BA14.40-B-1032-02B

 Engines 457.9 and 460.984SCR control unit - chassis module on the support

*BA14.40-B-1032-02C

4

Loosen the electrical connection (2) from the SCR module (A95)

 Move the lock downwards and release the connection.

5

Install in reverse order

 Exhaust gas after-treatment

Number

Designation

Engine 924.9, 926.9 except Liquid Only

BA14.40-B-1032-02B

SCR control module - Chassis module on support

Nm

12

 Exhaust gas after-treatment

Number

Designation

Engine 457.9; 460.984 except Liquid Only

BA14.40-B-1032-02C

SCR control unit - chassis module on the support

Nm

12