92
9. MAINTENANCE [How to Service the Air Compressor]
WARNING
●
Change the oil regularly, as instructed in the
standard maintenance schedule. (
9.2)
Neglecting to change the oil causes oil
deterioration that could result in clogging of
the oil strainer and a fire.
●
Be sure to use the recommended lubricating
oil on 2.3
. Absolutely DO NOT mix
different types of lubricating oil.
●
Overfilling with lubricating oil may increase
shaft power and result in rise in oil temperature.
■
Oil drain
①
Stop the air compressor and disconnect the power.
Remove the front door (1) and left door.
②
Place oil pans under the oil drain ports
①②③
. The
dimension of oil pan is approximately 3
×
10
×
14
inches (75
×
250
×
300 mm). Prepare the oil jug of
6.6 gal (25 liters) or more for air-cooled type, and 3.9
gal (15 liters) or more for water-cooled type.
③
Remove the plugs of oil drain ports
①
and
②
. Then
connect copper pipes to the ports. The dimensions of
the copper pipes is 1/2B
×
2 to 4 inches (1/2B
×
50
to 100 mm). After that, open the oil drain valves
①
and
②
to drain lubricating oil.
④
After opening oil drain valves
①
and
②
, remove the
plug (for oil/air vent). (Note that the oil/air vent
location of air-cooled type and water-cooled type are
different.)
⑤
Remove the plug from oil drain port
③
to drain
lubricating oil.
⑥
Replace all lubricating oil bi-annually. Also once a year,
remove the oil port cover and wipe the sludge off of
the bottom of the gear case with a sponge and clean.
⑦
Close oil drain valves
①
and
②
. Tighten removed
plugs with seal tape to oil drain ports
①
,
②
,
③
and
oil/air vent.
■
Oil filling
⑧
Remove the oil filling port plug, and fill the oil until
the oil reaches the upper red line of the oil level
gauge.
■
Check/refilling
⑨
Turn on the power, press the
START
button and press
the
STOP
button after 5 – 6 seconds running.
⑩
Check the oil level on the oil level gauge. The oil
level drops because lubricating oil flows to the piping,
oil cooler and so on.
⑪
Disconnect the power and add the oil until upper red
line.
⑫
After refilling is complete, plug tightly.
⑬
Turn the power on, press the
START
button and
make sure the oil level is between the upper and
lower red lines of the oil level gauge.
⑭
Make sure no oil leaks from the oil drain valve and
plugs.
Oil drain port
②
(with plug)
Oil filter
Pan
Yellow line
Oil drain valve
①
(for oil case draining)
Oil drain port
①
(with plug)
Oil case
Oil filling port plug
Oil drain valve
②
(for oil case draining)
Oil cover
Plug
(for oil/air vent)
Plug
(for oil/air vent)
Air-Cooled
Water-Cooled
Oil drain port
③
(with plug)
only
Water-Cooled
Left door
Front door (1)
4
Lubricating oil Replacement (Annually)
