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7
Installation
SM-1500
Ch 4 Installation
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utoff
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1) Removing the Old Motor Cutoff Switch
Assembly
Perform the following steps to remove the
old motor cutoff switch assembly:
CAUTION
CAUTION
!
Ensure that the control circuits are
deenergized and the circuit breaker is
deenergized, disconnected by means of a
visible break, and securely grounded. Do NOT
start to work on a closed circuit breaker or a
circuit breaker with the main closing spring
charged.
a. Remove the front cover of the circuit
breaker.
Figure 2
Motor Cutoff Switch Assembly
Installed
a
a. Motor Cutoff Switch Assembly
b. Elevate and secure the circuit breaker
so that there is at least 6 inches of clear
space below the base pan of the circuit
breaker.
c. Once the circuit breaker is stable and
secure, remove the two (2) 1⁄4 - 20 x 3⁄4”
hex head bolts holding the assembly to
the circuit breaker floor pan using a
7⁄16 socket wrench and 7⁄16 open end
wrench (Figure 3). Remove the two (2)
1⁄4 - 20 flat washers from below and the
two (2) 1⁄4 - 20 star nuts and two
(2) 1⁄4 - 20 flat washers from above.
Figure 3
Removing Hex Head Bolts
d. Cut the tie wrap holding the wires from
the motor cutoff switch to the wire
harness (Figure 4) and disconnect the
wires, being careful to note which wires
go to which terminal and remove the
assembly (Figure 5).
