DURKOPP ADLER 767 Service Instructions Manual page 49

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Oil return from the hook box to the oilpan

The oil is conducted to the equalizing reservoir 19 from the hook box

via pipe 18. Via the pipe 21 with the sintered metal filter 20, the pump

12 on the hook shaft sucks oil back into the oilpan again. At the same

time the pump also sucks the oil out of the oilpan via the oil return felt

16 and the pipe 17.

22 = Oil drain screw

Oil feed to the hook

The oil returned from the sewing head flows into the hook box through

pipe 14. Here the oil can rise to the level at which it flows off to the

equalizing reservoir 19 through the overflow pipe 18.

The hollow hook shaft 30 brings the oil to the upper basin 26 of the

hook via the spriral grooves of the fixed shaft 32. From here the oil

reaches the lower basin 28 through the drilled hole 27. The smaller

portion of this oil is led to the hook run via oil pipe 25 through

centrifugal force. The greater portion of the oil flows back down again

and lubricates the sprockets 31 and the ball bearing 29.

Checking the oil feed and the oil level

–

Check the oil feed at the viewing glass 33 with the sewing machine

running.

–

Check the oil level at the viewing glass 34.

The oil level should lie between " FULL " and " EMPTY ".

If not, then fill the oil reserve as described in the Operating

Instructions.

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