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Below is a fitting guide for your convenience - Please give us a positive vote if it proves useful.
When a failed Audi S4 air conditioning compressor is replaced by a new Audi S4 a/c compressor, it is so important to have the lubricant
distributed evenly across the Audi S4 air conditioning compressor and the Audi S4 a/c system before engaging the system for the first
If this is overlooked and the Audi S4 air con compressor is engaged immediately after is has been charged with
refrigerant, it may happen that all the oil in the Audi S4 a/c compressor will be pushed out all at once while there
is no oil yet to enter the Audi S4 air conditioning compressor on the other side. This is caused by the fact that it takes some
time for the oil to spread across the system and mix with the refrigerant. Eventually the Audi S4 ac compressor
may be damaged because of a lack of lubrication during the first few minutes of operation.
This will of course be more problematic after the system has been flushed, this will mainly be the
case after the Audi S4 air con compressor has suffered a catastrophic failure with metal particles from the Audi S4 a/c compressor
being spread across the entire system.
A rule of thumb guide when installing a new Audi S4 air con compressor is to manually turn the Audi S4 a/c compressor pulley
to make sure that the oil is distributed through the Audi S4 air con compressor evenly. Experienced engineers will
normally turn the Audi S4 ac compressor 10—15 times to ensure that oil has been pushed around the system.
There is still more to do to prepare the Audi S4 air con compressor, knowing and following the procedure will be of
great importance if a newly installed Audi S4 air conditioning compressor should fail after a short period of time and within
its warranty period. There is no bigger disappointment than having a warranty claim denied because
something as simple as the following procedure has been overlooked.
Generally new Audi S4 a/c compressors are supplied charged with oil, but it is always recommended that you
check this by draining the new Audi S4 air con compressor to check the amount of oil in the Audi S4 air conditioning compressor.
Then once you have removed the old Audi S4 a/c compressor you should do the same again, empty the old Audi S4 ac compressor
of oil to see how much oil was in it and then fill the new Audi S4 air con compressor with the same amount
this is to avoid over charging the system with oil.
After this has been done and the Audi S4 a/c compressor has been fitted, you do not engage the Audi S4 air con compressor with
the engine running until the following steps have been followed.
1, Open all air louvers at the dash board, 2, Start the engine and let it stabilise at idle speed 3, Set the
blower at maximum speed, 4, Engage the Audi S4 a/c system and operate it continuously for 2 minutes at below
After the two minutes the Audi S4 air con compressor oil will have distributed evenly throughout the a/c system.
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