ar4720a2000la

Remove/install fuel prefilter with water separator

Type ar · topic 47.20 · version 0100 · 2007-08-07

Applies to: ENGINE 904.925 in MODEL 8AB390.053 /054 ENGINE 904.965 in MODEL 8 AB390.053 /054

Where it sits

Function group 1 Engine › 47 Fuel system, powertrain energy supply › 47.20 Fuel pump, filter — Series 390 (models 053, 054) · Series 904 (models 925, 965)

EinPAS 16 Fuel/power supply to engine › 16.10 Fuel supply › 16.10.32 Feed unit/pump — Series 390 (models 053, 054) · Series 904 (models 925, 965)

EinPAS 16 Fuel/power supply to engine › 16.10 Fuel supply › 16.10.41 Filter/water separator — Series 390 (models 053, 054) · Series 904 (models 925, 965)

AR47.20-A-2000LA

Remove/install fuel prefilter with water separator

23.7.07

ENGINE 904.925 in MODEL 8AB390.053 /054

ENGINE 904.965 in MODEL 8 AB390.053 /054

Remove/install fuel prefilter with water separator

A47.20-0029-05

1 Manual fuel pump

2 Bolt

3 Bleed screw

4 Fuel pipe

5 Valve

6 Filter head

 	Remove/install
Danger!	Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel and risk of injury to eyes and skin caused by contact with fuel	No fire, sparks, open flames or smoking. Only pour fuels into suitable and appropriately marked containers. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
 Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
1	Open valve (5) and drain off fuel-water mixture	 Dispose of the water/fuel mixture in accordance with the relevant environmental laws and regulations.
2	Remove fuel lines (4) from filter head (6)	 Installation: Replace sealing rings.
3	Remove bolts (2) and fuel prefilter with water separator
4	Install in the reverse order
	Bleeding
5	Remove bleed screw (3)
6	Fill fuel prefilter with water separator using the manual fuel pump (1) until fuel pours out free of bubbles at the vent bore
7	Tighten bleed screw (3)
8	Actuate manual fuel pump (1) until an increased resistance is noticeable
9	Start engine and bleed the fuel system	 Run engine for approx. 1 minute. The fuel system is bled automatically.
	Checking
10	Check the fuel prefilter with the water separator for leaks	 In the event of leakage: determine and eliminate cause.
11	Turn off engine

Referenced documents

as0000z000501a 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.
as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.