Weller 6966 HEAT GUN - Manual (Page 3)

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II. Disassembly
a. Insert diagonal pliers under head of ferrule drive screw (1) and remove.
b. Slide ferrule (25) forward to remove.
c. Open wire hanger (7) and remove.
d. Remove screws (18) and (23) and screw and nut (8).
e. Lift left housing (12) to expose inner assembly.
III. Assembly
a. Position cord protector (19) as shown.
b. Check wiring for shorts and grounds.
c. Position left housing (12), aligning screw holes.
d. Replace screws (18) and (23) and screw and not (8).
e. Replace switch (21) by snapping into place. Make sure it is well-seated.
f. Replace ferrule (25), aligning screw hole and press in drive screw (1).
g. Close wire hanger (7) into holes of housing assembly (9).
IV. Cone and Insulator Assembly
a. Disassemble per Section II.
b. Cut off wire nut (15).
c. Remove scroll and motor assembly (10). Remove screw (13) and lift scroll and motor assembly (10) off
right housing (9).
d. Remove cone and mica insulator assembly (2). Squeeze wide end of cone (2) to (top and bottom) to
release from tabs (3) on scroll assembly, remove tape strips to release cone.
e. Remove mica insulator (24) from heating element with diode assembly (4). Replace with new mica insulator
packaged in replacement cone and insulator assembly.
f. Replace cone (2) by snapping cone over tabs (3) on barrel end of scroll, positioning green lead of con (2)
between cone and right housing (9). For heat guns without tabs (3) on motor and scroll assembly, place aluminum tape
strips provided across junction of motor and scroll assembly and con to secure cone.
g. Position ground wire (14) (green; yellow-green, 220 models) from cone under switch (21)
h. Strip end of green lead of cordset (20) and twist green leads together and screw on wire nut (15).
i. Reassemble per Section III.
V. Heating Element With Diode Assembly
a. Disassemble per Section II.
b. Remove screw (13) and lift motor and scroll assembly (10) off right housing (9).
c. Squeeze wide end of cone (2) (top and bottom) to release for tabs (3) on scroll (or remove tape strips); then
remove cone.
d. Remove left scroll half (11).
e. Desolder joints at points (5) and (6). CAUTION: Do not overheat solder joints or adjacent plastic will melt.
f. Remove red wire leads from terminals on switch (21).
g. Lift heating element with diode assembly (4) away from housing (9).
h. Slip new heating element with diode assembly into motor and scroll assembly (10) and resolder bare leads at
solder joints (5) and (6) as shown. See CAUTION note, Section V, Step 5.
i. Snap left scroll half (11) over motor and scroll assembly (10) and snap cone (2) over tabs (3) on barrel end of scroll
(or replace tape strips), positioning green lead of cone between cone (2) and right housing (9). Replace scroll and
cone in original position as shown, making sure no leads are underneath motor and scroll assembly (10). Replace
screw (13) and tighten.
j. Attach red leads with connectors to switch (21) as shown.
k. Connect red lead from thermal cutoff (22) to remaining lead from cordset. Twist bare leads together and screw on
plastic wire nut (16).
l. Reassemble per Section III.