GE AKR-30 Series Maintenance Manual page 28

SECTION 7-Breaker Maintenance (Cont.)
7.12.1 COMPONENT REPLACEMENT
To gain access to the electrical control components,
the breaker's front escutcheon must be removed. Type B
D
and breakers require that both the deep molded escut­
cheon and the shallow steel escutcheon be removed.
Before removing the front escutcheon on Type A or B
breakers, a supporting block should be placed under the
36A,
front frame to keep if from tlipping forward.
Referring to Fig. the X-relay or K-relay and F and
switches are mounted on the same bracket. This mounting
bracket is fastened to the right-hand mechanism side frame
by two hex-head screws.
1/4-20
allows the bracket to be pulled forward from between the
mechanism side plates.
fastened from the left side frame to allow enough freedom
for all the devices and the wiring harness to be taken from
between the side frames. With the bracket removed, in­
dividual devices can be replaced easily.
The closing solenoid is mounted by means of mounting
bracket to the bottom of the breaker frame. The most con­
venient way to take off the solenoid is to remove the moun­
ting bracket and then disconnect the solenoid from the
bracket. The pin connecting the armature to the closing
link must also be removed.
The charging motor is secured through three spacers to
the mechanism frame. The front mounting bolt is accessi­
ble using a socket and universal joint through the opening
in the side of the breaker's frame. The upper rear mounting
bolt is accessible using a socket and universal joint over
the top of the frame. The lower rear mounting bolt is ac­
cessible using a socket and universal joint through the
opening in the frame's side by the buffer assembly. Slow­
close the breaker to move the flywheel assembly out of the
way.
The ratchet on the camshaft is removed by driving out
the rol l pin which fastens it to the camshaft. Before this
be the charging motor must be removed and the
can done,
arr an ged for "slow-dosing" as described
closing spring
earlier. Tum the camshaft, using the maintenance handle,
until the roll started, tum the camshaft to gain
pin is well
enough the roll pin to clear the
space for
the ratchet note the position of the
Before removing
ratc e ' mar1( the ratchet's hub and the camshaft.
h t s roller or
ratchet, be sure It Is oriented with
When replacmg the
respect to the camshaft as
ed the mark made on the hub with the
180 degrees Align
degrees,
mark on the or position the roller as It was. If the
camshaft
is
ratchet displaced 1�
hub line up with the holes in the cam­
wil l not completely
shaft.
assem b
The driv1ng pawl
I S
drive pin Fig.
as shown 1n
har
1 . Remove the c gin
2.
Remove retaJning ring
the
the components.
3. grease or
Wipe off any
LUBRICA TE.
4.
Install the
components
28
Removing these screws
The W-relay must also be un­
breaker
it originally and not di
was
the holes in the ratchet's
ed to the charging motor's
l
36 8 .
To the driving pawl:
replace
g motor.
the drive pin. Slip off
from
the drive pin. DO NOT
dirt from
as
shown.
1
G
1.
RETAINER RING
2.
WASHER
PAWL ASM
3.
FIG. 36B - DRIVING PAWL ASS E MBLY DETAILS
The holding pawl pivots on a pin which is assembled to
the mechanism frame. Refer to Fig.
holding pawl:
1 . Remove the front escutcheon for accessibility.
2.
Using the maintenance handle, rotate the ratchet
enough to disengage the holding pawl.
3.
Remove the retaining ring and washer from the pivot
pin.
4.
While holding the spring pressure from the holding
pawl, remove the existing pawl and slip on the new pawl.
5.
Install the washer and retaining ring.
6. Verify that the holding pawl engages a minimum of
ratchet laminations.
7. Verify that the holding pawl pivot pin is perpendicular
to the mechanism frame. The hardware which asse m bles
the pivot pin to the frame must be torqued to
minimum. If this hardware must be retightened, add LOG­
TITE 290
to the shaft threads.
8.
Install the front escutcheon. Tighten the escutcheon
80
hardware to
frame.
­
pl c
s a
1.
MECHANISM FRAME
2.
PIVOT PIN
3.
SPRING
4.
WASHER .032"
FIG. 36C - HOLDING PAWL ASS E MBLY DETAILS
3
5
4
4.
SPRING WASHER
.010•
5. WASHER .032•
MOTOR DRIVE PIN
6.
36C.
±
10 in-lbs.
3
4
5. PAWL ASM
WASHER
6.
.Q10•
RETAINING RING
7.
6
To replace the
4
250
in-lbs
6
7
5