3.1 Ambient conditions Operation Coolant z Mixing ratio antifreeze/cooling water ( 26 ) . High ambient temperatures, high altitude Under the following operating conditi- ons, the amount of fuel is reduced au- tomatically, controlled by the electronic control unit. 3 Under the following application and operating conditions, the amount of fuel must be redu- ced. z above 1000 m altitude z above 30 °C ambient temperature Reason: When the altitude or ambient tempe- rature increases, the air density decreases. This reduces the amount of oxygen in the en- gine intake air and the fuel-air mixture would be too rich if the injected amount of fuel were not reduced. z The results would be:
black smoke in the exhaust high engine temperature reduction in engine performance poss. impairment of the start behaviour Consult your equipment supplier or DEUTZ partner if you have any other questions. Low ambient temperatures Lubricating oil z Select lubricating oil according to ambient temperature ( 22 ) and consult DEUTZ part- ner if necessary. z Halve the oil change times in case of fre- quent cold starts. Fuel z Below 0 °C use winter fuel ( 24 ) . Battery z A well-charged battery ( 42 ) is a prerequisi- te for starting the engine. z Heating the battery to about 20 °C improves the starting behaviour of the engine. (Remo- ve and store the battery in a warm room).
Cold start aid z Heating plugs, heating flange, spark plug system can be used as cold start aids, for example. ( 18 ) . 15