Adjustment
2 - 1
2 Adjustment
On the PFAFF 918, 937, 938 and 939 no c-clamps may be attached to the
needle bar as this would damage the special coating on the needle bar.
2.01 Notes on adjusting
All adjustments in these adjustment instructions are based on a completely assembled
machine and must only be carried out by trained specialists. Covers on the machine which
have to be removed and replaced for checks and adjustment work are not mentioned.
2.02 Tools, gauges and other accessories
● Screwdrivers with blade width from 2 to 10 mm
● Wrenches (spanners) with jaw width from 7 to 14 mm
● Allan keys from 1.5 to 6 mm
● Metal rule, Part No. 08-880 218-00
● Blocking pin (5 mm diameter), Part No. 13-030 341-05
● Sewing thread and test material
2.03 Abbreviations
tdc = top dead center
bdc = bottom dead center
2.04 Work symbols
Note, information
Servicing, repair, adjustment, maintenance
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