Rocker Bolt For The Looper Drive And Left Bottom Shaft Bearing - Duerkopp Adler 171 Service Manual

2.3 Rocker bolt for the looper drive and left bottom shaft bearing

Turn off main switch!
- Danger of injury -
The distance between the centre of the needle and
the beginning of the left bottom shaft bearing 6
should be 39.8 mm and between the centre of the
needle and the end of the rocker bolt 38.8 mm.
The rocker bolt 2 must be flush with the face 3 of
the bottom shaft.
– Unscrew the screw 9 and drain the oil in the
housing. Set the machine into the upright
position.
– Remove the needle, needle guard, looper
holder 8 with the looper and the thread
trimming device 7.
– Loosen the clamping screw 11.
– Carefully remove the looper drive housing 10.
At the same time slowly turn the bottom shaft 3.
1 2 3 4
7 8 9
8
6
5
10 11
– Screw on the gauge 1, order no. 933 735.
Loosen the clamping screws 5.
– Push the bottom shaft bearing 6 beside the
gauge. Tighten the clamping screws 5.
– Loosen the screws 4.
Check, whether the rocker bolt 2 is dead
against the face 3 of the bottom shaft.
– Remove the grease cover and the oil drip pan
15.
– Loosen the eccentric 13, adjusting ring 14 and
the gearwheel 12.
Shift the bottom shaft 3 such that the distance
between the bottom shaft bearing 6 and the
rocker bolt 2 is 1 mm or the rocker bolt rests
against the gauge.
– Set the adjusting ring 14 and the eccentric 13
tight and align the gearwheel 12. Tighten the
screws.
– Check the running of the timing belt on the
bottom timing belt pulley. If necessary, align the
bottom timing belt pulley.
– Screw in the screw 9.
Re-mount the looper drive housing and fill with
ESSO SP-NK 10 oil to the upper mark of the
sight glass.
– To adjust the housing, looper, needle guard and
the thread trimmer, see sections 2.4, 2.5, 2.6,
2.7 and 2.14.
2.4 Looper drive housing
12
13 14 15 3