Lubricating The Hook - Pfaff 939 U Instruction Manual

Care and maintenance
11

Lubricating the hook

.02
● Lay the machine head on its back.
● Fill the oil reservoir 1 up to the upper marking 3 through hole 2.
● Before operating the machine for the first time or after longer stationary periods,
11 - 2
2
3
Fig. 11 - 02
Turn the machine off!
Danger of injury if the machine is started accidentally!
Only use oil with a mean viscosity of 10.0 mm
3
0.847 g/cm
add a few additional drops of oil into the hook race (see arrow in Fig. 11-03).
Return the machine to its upright position with both hands. Danger of crushing
between machine head and table top!
We recommend PFAFF sewing machine oil.
Part no. 280-1-120 105.
1
at 15°C.
Fig. 11 - 03
2
/s at 40°C and a density of