MMD Equipment 185S-6C2 - Manual (Page 41)

5.Periodic Inspection/Maintenance
5-8
W010
A100365
5.5.5 Change compressor oil
[At 300 hours for the first change and at every 500 hours thereafter]

When you refill the separator receiver tank with compressor oil,
stop the engine, and make sure that the pressure gauge indicates
0psi (0bar) and there is no residual pressure in it, and then
gradually loosen the oil filler cap for refilling oil.

Note residual pressure in the receiver tank could force both
extremely hot compressed air and oil to jet out and you may be
scalded or seriously injured.

Even continuous oil replenishment cannot improve its deteriorated
condition. Be sure to change the oil completely at every scheduled interval.

Do not mix it with other brand oil, or it will cause poor performance and shorten the life of the
compressor oil. (But fresh compressor oil could accept a mixture of small amount of different brands.)

Running the unit with old and deteriorated compressor oil will cause damage to bearings, or serious
accident like ignition in a separator receiver tank. Be sure to change the oil completely at every
scheduled interval.

Follow the designated regulations to dispose of compressor oil.
① After residual pressure is completely relieved
from separator receiver tank, remove oil filler
cap“1”and open drain valve“2”for draining
oil. And then open drain valve“4”of oil cooler
for draining also the oil accumulated in
bottom of oil cooler.
② After compressor oil is completely drained out,
close drain valve“2”and“4”for sure.
③ After refilling fresh compressor oil up to the
upper limit of level gauge, close oil filler cap
“
1”. Check o-ring“3”of oil filler cap“1”
whether it is hardened and/or damaged. If it
is found damaged or hardened, replace it with
a new one.
[Quantity of oil：approx. 3.96gal.(15L)]
④ Start the engine for a short while, then
replenish the oil to fill shortage. Repeat this
procedure for 1 to 2 times to check if the oil
level has reached its appropriate point. Be
careful not to overfill the oil.

If oil is cold when it is changed, it takes a longer
time to drain oil completely. But make sure to
drain oil completely.
Refilling of compressor oil
3
1
4
Receiver of drained condensate
A100366
2