Lincoln Electric FLEX FEED 74 HT Operator's Manual page 19

FLEX FEED™ 74 HT
PINION GEAR RATIO
As shipped from the factory, a 20 tooth pinion gear is
installed. If desired, the 30 tooth pinion gear may be
installed for more speed but less torque.
1. Turn power OFF at the welding power source.
2. Open the wire drive door and loosen the set screw
holding the hinge pin using a 5/64" hex key. Slide the
hinge pin towards the rear and remove the door.
FIGURE A.15
HINGE PIN
SET SCREW
A-12
INSTALLATION