6.5
Maintenance
Maintenance
Step 1: Draining
a. Remove drain plug from the bottom of the separator
tank and drain out all oil. Drain oil while the compressor
is warm.
b. Remove the pipe and drain plug from bottom of oil
cooler. Then completely drain.
c. Disconnect all oil pipe work which could trap oil and
drain completely.
d. Drain oil from the airend discharge pipe after
dismantling it.
e. Drain oil from the airend by hand rotation.
Step 2: Flushing (Only for oil change over)
Check the air-oil seperator differential pressure.
To flush clean/non-varnished machines, using:
Mineral/PAO/PAG oils
a. Fill the compressor with the ELGi cleaner (use the same
compressor oil fill volume) and run the compressor.
b. After 500 hours of running, drain the cleaner as per
step 1.
c. Refill the compressor with new compressor oil.
d. Send a sample** of the compressor oil to ELGi for oil
analysis after 300 hours.
Step 3: Filling the oil
a. Add fresh oil; fill it up to the oil fill plug. (initial fill)
b. Close the oil fill plug.
c. Pour oil into airend, then restart the compressor.
d. Allow it to run for about 10 minutes.
e. Stop the compressor.
f. Unscrew the oil filling plug after 5 minutes so that
residual pressure in the tank is vented out through the
bleed hole in the oil fill plug.
g. Refill the tank up to the oil fill plug. (second fill)
h. Restart the compressor.
6.1.2.5 Oil filter
The oil filter is fitted between the oil cooler and the airend
unit. The components of the oil filter assembly are shown
in the figure. This is a full flow filter with a pleated
element. To service this filter, order the consumables kit
(available with ELGi service personnel) The procedure for
complete servicing of this filter is as follows.
Pre work
Switch off the compressor and disconnect power supply
to the compressor.
Close the discharge end ball valve.
Release air oil tank pressure and allow the tank to cool
NOTE
The compressor is originally filled with a particular oil, if
you want to change over to other types of oil, perform
steps 1, 2 and 3.
But if you want to change the oil but continue with the
same kind (same brand & type) perform steps 1 and 3
only.
Ensure that you drain at least 90% of oil capacity of the
compressor; if not the residual oil can contaminate new
oil.
Ensure no oil spills on anti-vibration mount during
maintenance.
**: Applicable only for USA.
The cleaner is not recommended to run longer than 500
hours.
Change the oil filter and oil separator after oil change
over.
NOTE
OIL FILL PORT
(OVER FILL CAP)
OIL LEVEL SIGHT
GLASS
Figure 14. Air oil separator tank– oil drain
Figure 15. Cooler oil drain
BALL
VALVE
DRAIN PLUG
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