TM 10-4610-239-24
TM 08580B-24/3
ASSEMBLY.
NOTE
There are five motor controllers covered in this task. All are assembled
the same. Minor differences are noted in text.
a.
Position pad (22), yoke (21), coil (20), lower base structure (19), spring supports (17), and springs (18) on mounting
bracket (23). Install two screws (16).
b.
Position crossbar (12) in upper base structure (2).
c.
Position upper base structure (2) on lower base structure (19). Install two screws (15).
d.
For K3 thru K6, position four stationary contact assemblies (14) and install four screws (13). For K7, position two
stationary contact assemblies (14) and install two screws (13).
e.
For K3 thru K6, install three moveable contacts (10) and springs (11) on crossbar (12).
For K7, install two
moveable contacts (10) and springs (11) on crossbar (12).
f.
For K3 thru K6, position three heaters (25) on overload relay (3) and install six screws (24). For K7, position two
heaters (25) and install four screws (24).
g.
Position overload relay (3) and install two new lockwashers (7) and screws (6).
h.
For K3 thru K6, position three connector straps (5) and install six screws (4). For K7, position two connector straps
(5) and install two screws (4).
i.
For K3 thru K6, attach wire (1) to overload relay (3) and upper base structure (2). For K7, attach three wires (1) to
overload relay (3) and upper base structure (2).
TEST.
a.
Using multimeter set at 0 to 100 ohms, check between upper and lower sets of stationary contacts (14). Checkor
f
0 ohm for each pair.
b.
Check across terminals of overload relay (3). Indication should be infinity indicating an open circuit. If indication is
0, press reset rod (26) and recheck. If indication remains 0, replace overload relay.
WARNING
Electrical high voltage can cause serious injury or death. When
applying power during a test, take proper measures to ensure personal
safety.
c.
Apply 110 V ac, 60 Hz across terminals of coil (20). Crossbar (12) should activate. If crossbar does not move,
replace motor controller. Refer to paragraph 3-48.
d.
Remove power from coil (20).
e.
Position arc box (9) and secure with two captive screws (8).
f.
Install motor controller. Refer to paragraph 3-48.
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