With Regard To Lubrication - JUKI MF-7900 Series Engineer's Manual

(19) With regard to lubrication

WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1. Replacing the oil filter
Normal lubrication cannot be performed if dust collects in oil filter ❶ .
Inspect it every 6 months.
2. Oil circulation identification window
Make sure that lubricating oil rises to oil circulation identification window ❹ during operation.
<When using the sewing machine for the first time>
Lubricating oil has been taken out at the time of delivery. Be sure to supply lubricating oil before using
the sewing machine for the first time.
* Oil used : JUKI CORPORATION GENUINE OIL 18
(Caution) Do not use oil addition agent since deterioration of lubricating oil or machine trouble will
be caused.
Remove oil hole cap  and fill the oil reservoir with lubricating oil up to the level between the upper
and lower engraved marker lines of oil gauge  .
<Checking before using the sewing machine>
1) Check oil gauge  and make sure that lubricating oil level is between the upper and lower two
lines. When lubricating oil level lowers below the lower line, supply lubricating oil.
2) Make sure that lubricating oil comes out from the nozzle of oil circulation identification window ❹
when rotating the sewing machine. When lubricating oil does not come out, perform "Inspecting
and replacing the oil filter ❶ ".

Standard adjustment
❶
❷
❻
❸
❺
– 50 –

Lubrication
❹