5. Maintenance
ARV-310 5-5
When the oil is contaminated, change the oil.
For changing oil, refer to “5-3-2 Oil Change”.
If the oil level has lowered to the center of the oil check window,
add oil to the level of two-thirds (2/3) of the window.
For replenishing oil, refer to “5-3-2 Oil Change”.
2. Time to Reach Vacuum Decompression
Perform vacuum decompression to check the period of time
required to finish decompression referring to the followings as
a guideline.
○ Time required for decompression (guideline):
Within 1 min. (60 sec.) to 2.66 kPa (about 20 Torr), and
within 3 min. (180 sec.) to 530 – 660 Pa (about 4 – 5 Torr)
If decompression operation does not finish within the above
guideline, change the oil.
For changing oil, refer to “5-3-2 Oil Change”.
After the oil change, perform decompression for about 15
minutes to check if decompression operation finishes within
the above guideline.
・ Depending on materials that got mixed in the oil, changing oil only
once may not be sufficient. In such case, repeat changing oil two or
three times.
・ Odor of solvents, etc. is difficult to get rid of. It cannot be completely
eliminated.
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