Adjustment; Notes On Adjustment; Tools, Gauges And Other Accessories For Adjusting; Abbreviations - Pfaff 939 U Instruction Manual

12

Adjustment

12

Notes on adjustment

.01
All following adjustments are based on a fully assembled machine and may only be carried
out by expert staff trained for this purpose.
Machine covers, which have to be removed and replaced to carry out checks and
adjustments, are not mentioned in the text.
The order of the following chapters corresponds to the most logical work sequence for
machines which have to be completely adjusted. If only specific individual work steps are
carried out, both the preceding and following chapters must be observed.
Screws, nuts indicated in brackets ( ) are fastenings for machine parts, which must be
loosened before adjustment and tightened again afterwards.
12

Tools, gauges and other accessories for adjusting

.02
● 1 set of screwdrivers with blade widths from 2 to 10 mm
● 1 set of wrenches with jaw widths from 7 to 14 mm
● Open-ended spanner (jaw width 27 mm)
● 1 set of Allan keys from 1.5 to 6 mm
● 1 metal rule, (Part No. 08-880 218-00)
● Locking pin (5 mm diameter), part no. 13-030 341-05
● Feed dog adjustment gauge, part no. 91-119 995-05
● Hook bearing adjustment gauge, part no. 91-119 996-05
● Needles, threads and test material
12

Abbreviations

.03
TDC = top dead center
BDC = bottom dead center
The machine must be switched off for all adjustment work!
Danger of injury if the machine is started accidentally!
Adjustment
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