Retrofit fuel filter heater

AN47.20-D-0004A

Retrofit fuel filter heater

24.03.2016

Engine

646 in model 909

1

Fuel filter

2

Electrical center

3

Fuel preheating control unit

4

Nut

1

Fuel filter

2

Dewatering connection

3

Bracket

 Danger !

Risk of explosion from explosive gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of injury through burns to skin and eyes from battery acid or when handling damaged lead-acid batteries

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

AS54.10-Z-0001-01A



Notes on battery

AH54.10-P-0001-01A



Notes on carrying out repair work in the vehicle interior

AH68.00-N-0001-01S



Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A



Install

1

Disconnect battery ground line

2

Remove fuel filter (1) and install new fuel filter with fuel preheating



AR47.20-D-1070SD

3

Remove electrical center (2)



AR54.25-D-1382F

 Fold out electrical center; do not disconnect electrical connections.

4

Mount fuel preheating control unit (3) with nut (4) on the existing threaded pins on the firewall

5

Route, connect fuel filter heater wiring harness

AN47.20-D-0004-01A

 The wiring harness is designed for the engine 646 in model 906 and must be adapted for the model 909.

 Welding bead catcher

*129589019800

 SLK 2.8_crimping set / ELA

*220589019908

 Crimp set for cable lugs

*220589019902

 Wiring harness repair kit, basic

*000589139900

 New passenger car wiring harness repair kit

*220589049900

 Blade holder with clamping pliers

*220589019950

 MCP 2.8_/ Fl. blade 2.8_/ JPT / SPT

*000589139930

6

Install electrical center (2)



AR54.25-D-1382F

 Check the cable routing.

7

Place new drain pipe (2) on the dewatering connection on the fuel filter (1) and mount on bracket (3)

8

Connect ground line to battery

 Danger !

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

9

Start engine and perform a function test

 To do this connect multimeter with current clamp, spray the fuel preheating control unit with refrigerant spray until it is covered with an ice layer and check the switch-on temperature.

Filter heater switch-on temperature

*BE47.20-D-1001-02A

Fuel filter

Number

Designation

Engine 646 in model 909

BE47.20-D-1001-02A

Filter heater switch-on temperature

0C

­3

Parts ordering note

Part no.

Designation

Quantity

A 906 090 45 52

Parts kit for electric fuel preheating

1

N 000000 002798

Fuse link (60 A)

1

N 910112 006001

Nut

2

A 000 546 42 40

Cable lug

1

N 046225 008102

Cable lug

1

A 013 545 80 26

Female contact

1