| Safety precautions when working on natural gas system |
WARNING | There is a danger of explosion! Work on the high-pressure system must only be performed by personnel trained to § 41a StVZO for natural gas vehicles. |
| Release pressure in the system before working on the natural gas system. |
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Caution | When doing any repair work, especially in the engine compartment, pay attention to the following due to the cramped conditions: |
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| Route high-pressure lines in their original positions. |
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| To avoid damage to lines, ensure sufficient clearance to all moving or hot components. |
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| Never attempt to reshape high-pressure lines of natural gas system. |
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| First tighten union nuts hand-tight then turn 90° (1/4 turn) further, counterhold on union with a spanner for this. |
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| On no account must the union nut be tightened further than specified, otherwise the special connection will be damaged and the pressure line must be renewed. |
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| A leakage test of the screwed connection must be performed after each time a connection is loosened → Chapter. |
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| Disconnect battery earth strap before carrying out work on natural gas system. |
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| A leakage test must always be performed after working on the natural gas system. |
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| The natural gas system leakage test must only be performed by personnel trained to § 41a StVZO for natural gas vehicles. |
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| Only components of the same type and with the same product constructional approval may be exchanged on the high-pressure system. |
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| Work on the high-pressure system must only be performed by personnel trained to § 41a StVZO for natural gas vehicles. |
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| After working on the natural gas system a leak test must always be performed → Chapter. |
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| Only components of the same type and with the same product constructional approval may be exchanged on the high-pressure system. |
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| Parts of the natural gas system on which work is to be carried out, must first be evacuated. |
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| If the tank is to be removed, it must first be evacuated → Chapter. |
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