Leaktightness test of natural gas system

AR07.54-P-0001EN

Leaktightness test of natural gas system

20.09.2016

Engine

271.9 in model 212.0

with code 924 (Bivalent natural gas drive)

Location of the natural gas components

Natural gas components for trunk and undercarriage at the rear

1

Gas cylinder 1

2

Gas cylinder 2

3

Gas cylinder 3

Y107/1y1

Gas cylinder 1 gas shutoff valve

Y107/1y2

Gas cylinder 2 gas shutoff valve

Y107/1y3

Gas cylinder 3 gas shutoff valve

Natural gas components on undercarriage at the front

60

Pressure regulator

B18/1

Gas high-pressure sensor

Natural gas components in engine compartment

16

Gas distribution rail

B18/2

Gas low-pressure sensor

B50/3

Gas temperature sensor

Y106/1

Gas injection valve, cylinder 1

Y106/2

Gas injection valve, cylinder 2

Y106/3

Gas injection valve, cylinder 3

Y106/4

Gas injection valve, cylinder 4

 

Remove/install

 Danger !

Risk of explosion due to escaping combustible gas or overheating of gas cylinders.Risk of injury caused by burns to skin and eyes. Risk of frostbite to body parts caused by escaping gas and by touching components near the valves when emptying gas cylinders. Risk of poisoning or suffocation caused by inhaling gas.

Remove any sources of ignition.
Protective clothing, safety gloves and safety glasses must always be worn.
Ensure that the work area is adequately ventilated.
When working on vehicles at ambient temperatures over 60 °C, all gas cylinders must be removed.

AS00.00-Z-0018-01A

Only perform operation step 1 for leak test of the natural gas components in engine compartment

1

Remove air filter housing

AR09.10-P-1150CW

Only perform operation steps 2 and 3 for leak test of the natural gas components in the trunk

2

Remove side paneling on the right and cover for crossmember in the trunk

AR68.30-P-4600EW

3

Remove cover to partition wall in the trunk

 2 spreading clips above to the crossmember.

Only perform operation step 4 and 5 for leak test of the natural gas components on the undercarriage

 Danger !

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

4

Raise vehicle with vehicle lift

5

Remove covers under the gas tank system on undercarriage

AR47.10-P-0050-01EN

6

Remove rear lower engine compartment paneling

AR61.20-P-1105EW

7

Remove fender liner in right wheel well

8

Check natural gas system for leaktightness

AR07.54-P-0001-02AN



General information on leak testing for natural gas systems

AH07.54-P-0001-01AN

 The leak test includes all components of the natural gas plant.

Leak location spray LUBRION article no. 626.04

*BR00.45-Z-1005-03A

 Retightening of leaky high-pressure gas lines after assembly tightening process

*BA47.25-P-1002-01H

9

Install in the reverse order

 High-pressure gas lines

Number

Designation

Engine 266
with code 924 (Bivalent natural gas drive)
Engine 271
with bivalent natural gas drive

BA47.25-P-1002-01H

Retightening of leaky high-pressure gas lines after assembly tightening process

°

max. 45

Repair materials

Number

Designation

Order number

BR00.45-Z-1005-03A

Leak location spray LUBRION article no. 626.04

WIMMER CHEMOTECHNIK
Riedener Weg 50B
82319 STARNBERG, BAYERN
Telephone: (08151) 739981
Fax: (08151) 739982
www.lubrion.com