Duff-Norton SK6415-200 (SPA Series AC) - Manual (Page 10)

NOTE
If unit has potentiometer assembly (26) and gear (26b) does
not have to be replaced or if unit has no potentiometer
feature, proceed to Step 35.
34. Potentiometer Assembly (26)
a. If nut and washer were removed from
potentiometer, assemble washer (26d) and nut
(26c) on potentiometer (26a). Nut (26c) should
not be tightened on potentiometer (26a) face.
b. Assemble gear (26b) on potentiometer (26a)
shaft.
NOTE
Gear should be assembled with a very light press. See
sketch for required dimension of gear on potentiometer. Take
care not to damage potentiometer.
35. Assembly of Cover (9)
a. Feed motor (53) lead wires into capacitor box
cover (9). Care should be taken not to damage
lead wires. Assemble cover on housing (42),
aligning dowel pins (27) with bore in
cover and flats of limit switch shaft (22) with bore
and slot in end of screw (62).
NOTE
Limit switch shaft should be able to spring up when a light
pressure with finger is applied downward on limit switch nut
and removed.
b. Install lock washers (8) and button head cap
screws (7).
c. Feed motor lead wires (red and blue small
terminal ends only) into cover switch box through
5/8” diameter hole. Install terminal of red lead wire
on normally closed terminal of left side of switch.
Install terminal of blue lead wire on normally closed
terminal of right side of switch. (Wires going to
switches should be same color.) It may be necessary
threads).
27. Insert intermediate pinion shaft (32) in housing (42)
and place thrust washer (31) over shaft (32).
Assemble intermediate cluster gear (33) on shaft
and place thrust washer (31) on top.
28. Assemble bearing (28) on input pinion (29) (press on
inner bearing ring to prevent damage to
bearing).
29. Pack housing (42) gear box cavity with Aeroshell #6
grease (no substitutes).
30. Assembly of Motor (53) to Housing (42)
a. Note location of flat on input pinion by
marking spot on the housing. See Figure 6-1B.
b. Insert grommet (50) on input pinion (29)
between coupling (47) posts and install “O”-
Ring (52) in cavity of insert (51).
c. Pack cavity with Aeroshell #6 grease.
d. If hole plug (54) is in rear end of motor,
remove.
e. Feed motor (53) lead wires through hole in
housing (42) lining up couplings (47) on input
pinion (29) and motor (53) shaft. (Alignment is
critical at this point. See Figure 6-1B.)
NOTE
Input pinion (29) and motor (53) shaft flats are opposite
each other.
f. Assemble motor (53) into housing (42) . Before
assembling lock washers (46) and socket head
screws (45), hold motor firmly in place and, with
a screwdriver, turn motor shaft by using
screwdriver slot in end of motor shaft.
NOTE
Before turning motor shaft, make sure pinion shaft has
not been pushed out. It may be necessary to hold pinion
shaft down while turning motor shaft. If couplings are
properly installed, the motor can be turned freely in both
directions. If motor shaft will not turn, this is an
indication that couplings are not properly aligned and
assembly should be corrected.
g. Install lock washers (46) and socket head
screws (45).
31. Insert dowel pins (27) in housing (42) and place
gasket (41) in place over dowel pins (27).
32. Install air vent (58) in outer tube (55) ( it may be
necessary to back outer tube out in order to
install air vent or to have vent in a more
desireable position). Spot drill tube and install
set screw (33) to hold tube in place.
33. Install spring (61) into end of screw (62).
10
6415-200 manual 10/10/06 11:46 AM Page 10