Oil Change - CompAir L15 Operating And Service Manual

9. Service and maintenance
9.4

Oil change

Fig. 19
1 Oil reservoir
2 Oil filler cap R1"
3 Oil-level indicator
4 Max. oil level
5 Min. oil level
6 Oil drain R1/2"
7 Drain hose
Warning
Only change the oil when the screw
compressor unit is out of operation,
depressurized, and secured from being
switched on again!
Be careful when draining hot oil:
Danger of scalding!
Important
Remove oil residues and other deposits from unit
parts and from the coolers of compressors, which
are exposed to hot compressed air, according to
the operating instructions.
Note
Collect the waste oil, do not allow it to seep into the
ground!
Disposal in accordance with the regulations! Do not spill
oil! Check for leakage!
With these compressors, the oil change intervals
strongly depend on the degree of contamination of the
circulating oil. It must therefore be taken care that no
oil-deteriorating matter (dusts, vapours, gases) are
transported through the air intake filter into the oil circuit
of the compressor unit. Also a high content of humidity
in the intake air and the formation of condensate within
the machine affect the service life of the lubricant oil so
that a reduction in the oil change intervals may become
46
necessary. The specified oil change intervals refer to an
intake air from a normal environment without a high
content of foreign matter (dusts, vapours, gases).
When changing the oil, the waste oil is to be drained
completely, since used oil reduces the service life of the
new oil fill considerably.
Do not mix lubricating oils of different makes. When
changing over to a new oil type, the oil in the oil circuit
must be drained completely.
For the oil change intervals, see maintenance schedule.
When changing the oil, proceed as follows:
Switch the screw compressor unit off and ensure that it
•
is depressurized, electrically isolate and locked off.
Slowly open the oil filler cap (- 2 - Fig. 19), to
•
depressurize the screw compressor by releasing
any residual pressure in the unit
Remove the oil filler cap
•
Open the oil drain (- 6 - Fig. 19) for the pressure
•
reservoir and the oil cooler
Drain oil at operating temperature through the drain
•
hose (- 7 - Fig. 19)
Close the oil drain
•
Fill in oil up to the marking "maximum oil level"
•
(- 4 - Fig. 19) (ca. 54 litres) (ca. 14.3 US-Gal.)
Close the oil filler cap
•
Let the screw compressor unit run for approx.
•
2 minutes
Check for leakages
•
Switch the screw compressor unit off
•
Wait at least 5 minutes for the oil to settle and for
•
the air to disperse
Check oil level (see chapter 6.5)
•
The oil level must be between the maximum level
•
(- 4 - Fig. 19) and minimum level (- 5 - Fig. 19)
marked on the oil reservoir.
If required, top up oil
•
Changing intervals for lubricants
The operating conditions (e.g. coolant temperatures),
the operating modes and the quality of the intake air
(e.g. content of dust, content of gaseous foreign matter
such as SO , solvent vapours) have a strong influence
2
on the oil change intervals.
In this case the oil must be analyzed to check the
permissible length of time that the oil can be used (see
also chapter 9.15). Under no circumstances should the
oil be used beyond its design life.