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| The illustration shows an atomiser unit -A- for “Petrol”. |
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| The combustion air blower -V6- runs at a maximum speed of approx. 8000 rpm and is thus balanced at the factory together with the impeller -C-. Care should therefore be taken on removal and installation not to squash or twist the impeller on the shaft of the combustion air blower -V6-. |
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| Clean the atomiser unit prior to attachment to remove combustion residue. |
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| Clean the thread in the shaft of the combustion air blower -V6- before screwing in the bolt. |
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| If the bolt -B- is fitted without locking compound, it may work loose during auxiliary heater operation (and the atomiser unit drops into the combustion chamber). Without an atomiser unit, the fuel is no longer distributed and accumulates in the combustion chamber. Combustion no longer takes place and the combustion air blower may run at excessively high speed and become damaged in the process. |
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| Replace the bolt -B- and always apply temperature-resistant locking compound (e.g. exhaust system compound D 004 500) on fitting new bolt (this compound hardens due to the influence of temperature and remains solid even at higher temperatures). |
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| To slacken off the hexagon bolt -B-, provide support at the shaft of the combustion air blower -V6--C- which protrudes through the impeller (do not counterhold at actual impeller). |
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| Clean the thread of the hexagon bolt -B- and in the shaft of the combustion air blower -V6-. |
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| Coat the thread of the hexagon bolt -B- and in the shaft of the combustion air blower -V6- with temperature-resistant locking compound (e.g. exhaust system compound D 004 500). |
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| Attach the atomiser unit -A- to the shaft of the combustion air blower -V6-. |
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| To tighten the hexagon bolt -B- (tightening torque 3 Nm), provide support at the shaft of the combustion air blower -V6--C- which protrudes through the impeller (do not counterhold at actual impeller). |
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| Warm the bolt -B- e.g. using the hot-air blower -V.A.G 1416- for approx. 5 minutes to roughly 300 °C (to harden the locking compound). |
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Note