Powered by Safety
®
39
Maintenance
01.4IB.50032C
3) Closing Spring Removal
The closing spring must be removed
in order to perform slow closing of
mechanism.
Figure 12 Main Closing Spring Assembly
Compressed for Removal
a. Bracket
b. Bolt
c. Flat Washer
d. Spacer
e. Connecting Rod
c
d
e
b
a
Although main closing spring removal is
usually not necessary for lubrication, it may
be necessary for performing adjustments
or major overhaul tasks. Furthermore,
removal of the main closing spring permits
slow closing of the mechanism and the
vacuum interrupter contacts. For details,
Figure 13 Main Closing Spring Assembly
Installed
a
c
e
d
b
a. Bracket
b. Bolt
c. Lock Washer
d. Flat Washer
e. Spacer
The procedure for spring removal is as
follows:
a. With the main closing spring discharged
and the circuit breaker contacts open,
remove the screw at the top of the
spring rod together with the flat washer
and lock washer.
b. Remove the horizontal bracket at
the top of the main closing spring by
unfastening the two attachment screws.
c. Remove the spacer from below the
bracket.
d. Turn the bracket 90°, and replace it on
the top of the spring yoke.
e. Place the spacer above the bracket with
the flat washer below it.
f. Insert screw and tighten until the
tension is taken off the connecting rods.
