Tweco 181i Thermal Arc Fabricator - Manual (Page 45)

Fabricator 181i
Manual 0-51 91 3-15 INSTALLATION, OPERATION AND SETUP
4. Gently push the bottom of the front panel upward until the thumb screw is fully exposed.
Art # A-11485
Thumb Screw
Fully Exposed
Push Upward
5. Remove damaged thumb screw and replace with new one.
Art # A-11486
6. To reassemble, reverse steps 1 through 4.
3.13 Installing 4" (100mm) Diameter Spool
As delivered from the factory, the Power Source is fitted with a Wire Spool Hub which accepts a 8" (200mm) diameter
spools. In order to fit a 4" (100mm) diameter spool assemble parts in the sequence shown below in Figure 3-9.
Adjustment of the nut with nylon insert will control the MIG Wire Spool Brake. Clockwise rotation of this nut with
nylon insert tightens the brake. The brake is correctly adjusted when the spool stops within 4" (100mm) to 8"
(200mm) (measured at the outer edge of the spool) after MIG Gun trigger is released. Wire should be slack without
becoming dislodged from the spool.
CAUTION
Overtension of brake will cause rapid wear of mechanical WIREFEED parts, overheating of electrical
components and possibly an increased incidence of electrode wire Burnback into contact tip.