TM 10-4610-239-24
TM 08580B-24/3
INSPECTION. (Cont)
h.
Inspect coil for signs of burning, cracks, or damaged pins. Replace as required.
i.
Inspect all hardware for damaged heads or threads. Replace as required.
ASSEMBLY.
a.
Position pad (25), yoke (24), lower base structure (12), and two spring supports (22) with springs (23) on mounting
bracket (7). Install two new lockwashers (21) and screws (20).
b.
Position auxiliary contacts (19) on top of lower base structure (12) with end clip in hole in mounting bracket (7).
c.
Position six stationary contacts (18) and install six screws (17).
d.
Position crossbar (16) in upper base structure (3).
e.
Position springs (15) and moveable contacts (14) in crossbar (16).
f.
Position coil (13) in upper base structure (3).
g.
Position upper base structure (3) on lower base structure (12). Install two new lockwashers (11) and screws (10).
h.
Position three heaters (27) on overload reay (2) and install six screws (26).
l
i.
Position overload relay (2) on mounting bracket (7) and install four screws (6).
j.
Position three connector straps (5) and install three screws (4).
k.
Install wire (1) on overload relay (2) and upper base structure (3).
TEST.
a.
Using multimeter set at 0 to 100 ohms, check between upper and lower sets of stationary contacts (18). Check for
0 ohm for each pair.
b.
Check across terminals of overload relay (2). Indication should be zero resistance indicating ashort. If indication
is infinity, press reset rod (28) and recheck. If indication remains infinity,
replace overload relay.
c.
Check between two terminals of auxiliary contacts (19). Indication should be 0 ohm. If indication is infinity,
replace auxiliary contacts.
NOTE
Two people are required for steps d, e, and f.
d.
Helper, manually press crossbar (16) and hold in position. Place test leads on sets of upper and lower contacts
(18).
e.
With crossbar (16) still pressed, check for infinity acros terminals of auxiliary contacts (19). Release crossbar.
s
Replace auxiliary contacts if shorted.
3-200
