Lubrication - JUKI MH-481 Manuel D'utilisation

4. LUBRICATION

WARNING :
To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine and
check to be sure that the motor has totally stopped rotating in prior.
Oil reservoir
1. Before operation, fill the oil reservoir with JUKI New Defrix Oil No.1 up to the HIGH mark.
2. Whenever the oil level drops to the LOW mark, add more oil.
3. When the sewing machine is run after the oil reservoir has been filled, oil can be seen splashing
on the oil sight window. However, the amount of oil splash has no relation to the amount of oil in
the reservoir so there is no need to worry.
4. When the oil has become dirty, replace it with fresh oil. Unscrew the oil plug from the oil reservoir
when draining.
5. When using a new sewing machine or one that has not been used for a long time let it idle for
about ten minutes at 3,500 to 4,000 sti/min to run it in.
(Caution) 1. Verify that the lubricating oil is properly circulating by watching it through the oil
sight window.
2. Remove any fiberous dust from the oil pump filter screen and the oil reservoir.
3. When the lubrication oil has become dirty, drain it through the oil drain screw cap
and fill it with new JUKI New Defrix Oil No.1.
4. Verify that the oil level is above "LOW' mark.
5. Clean up the oil reservoir magnet with a cloth.
Amount of oil (oil splashes) confirmation paper
①
Confirmation of the amount of oil supplied to the face plate parts
1) If the machine has not been sufficiently warmed up for operation, make the machine run idle for
approximately three minutes. (Moderate intermittent operation)
2) Place the amount of oil (oil spots) confirmation paper under the hook immediately after the ma-
chine stops running.
3) Confirm the height of the oil surface in the oil reservoir is within the range between "HIGH" and
"LOW".
4) Confirmation of the amount of oil should be completed in five seconds. (Check the period of time
with a watch.)
HIGH mark
LOW mark
70 mm
Position to confirm the amount of oil (oil splashes)
②
Oil splashes
– 4 –
Oil sight window