Measure fuel intake pressure upstream of fuel pump · ar0715g200005dd · Mercedes-Benz WIS

AR07.15-G-2000-05DD	Measure fuel intake pressure upstream of fuel pump
 Danger	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.	No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. Wear protective clothing when handling fuel.	AS47.00-Z-0001-01A
 Warning	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
	Notes on possible sources of fault in the low-pressure fuel circuit		AH07.15-N-1000-02F

Check values for fuel pressure

Number	Designation			Engine 900.9, 904.9, 924.9, 925.9, 926.9, engine 902.9, 906.9 except natural gas engine
BE47.00-N-1004-01B	Fuel suction pressure upstream of fuel pump at filter supply	Breakaway speed	bar	0,4...0,5

 Fuel lines/hoses

Number	Designation		Engine 900.9, 904.9, 924.9, 925.9, 926.9, engine 902.9, 906.9 except natural gas engine
BA47.25-N-1008-01J	Nut, feed line and return line to fuel filter	Nm	45

541 589 00 91 00

Adaptation parts

617 589 04 21 00

Tester

Shown on engine 900.9
Measure

1	Remove fuel line (3) from connection "VL" (1.1) of the fuel prefilter (1).

 Collect fuel which runs out in a suitable container.

2	Check sealing rings on  fitting (2.2) for damage.

G07.15-A005-06

3	 Install test equipment (2) with  test lines (2.1) and  fitting (2.2, 2.3) between fuel line (3) and connection "VL" (1.1) of the fuel prefilter (1).

 The  fitting (2.2) with opening clamp (A) must press on check valve for connection "VL" (1.1).

4	 Set up and attach test equipment (2) in a suitable place.

5	Start engine and run.

 See information from body manufacturer.
The fuel system is bled automatically.

6	Carry out measurement and read off fuel intake pressure on the  test equipment (2). .

 Perform measurement at the maximum governed rpm.

7	Switch off engine.

8	 Remove test equipment (2) with  test lines (2.1) and  fitting (2.2, 2.3).

 Collect fuel which runs out in a suitable container.

9	Attach fuel line (3) with new sealing rings to connection "VL" (1.1) of the fuel prefilter (1).  .

ah0715n100002f Wskazówki dotyczące możliwych źródeł usterek w niskociśnieniowym obwodzie paliwa
as0000z000501a Niebezpieczeństwo wypadku na skutek samoczynnego ruszenia przy pracującym silniku. Niebezpieczeństwo obrażeń na skutek zmiażdżenia lub poparzenia przy wykonywaniu czynności podczas rozruchu lub przy pracującym silniku.
as4700z000101a Niebezpieczeństwo wybuchu wskutek zapalenia, niebezpieczeństwo zatrucia wskutek wdychania i połknięcia paliwa oraz niebezpieczeństwo obrażeń wskutek kontaktu skóry i oczu z paliwem.