GE AKR-30 Series Maintenance Manual page 206

SECTION 7-Breaker Maintenance (Cont.)
7.1 2.1 COM PON ENT REPLACEM ENT
To gain access to the electrical control components,
the breaker's front escutcheon m ust be removed. Type B
and D breakers requ i re that both the deep molded escut­
cheon and the shal low steel escutcheon be removed.
Before removing the front escutcheon on Type A or B
breakers, a supporting block shou l d be placed u nder the
front frame to keep if from tipping forward.
Referring to Fig. 36A, the X-relay or K-relay and F and G
switches are mounted on the same bracket. This mounting
bracket i s fastened to the right-hand mechanism side frame
by two hex-head 1 /4-20 screws. Removing these screws
allows the bracket to be pul led forward from between the
mechanism side plates.
fastened from the left side frame to allow enough freedom
for al l the devices and the wiring harness to be taken from
between the side frames. With the bracket removed, in­
d ividual devices can be replaced easily.
The closing solenoid is mounted by means of mounti ng
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
l ink 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 frame.
bolt i s accessi ble using a socket and universal joint over
the top of the frame. The lower rear mounting bolt i s ac­
cessible using a socket and universal joint through the
open ing in the frame side by the buffer assembly.
close the breaker to move the flywheel assembly out of the
way.
The ratchet on the camshaft is removed by driving out
the roll pin which fastens it to the camshaft.
can be done, the charging motor m ust be removed and the
closing spring arranged for "slow-closing" as descri bed
earlier. Turn the camshaft, using the maintenance handle,
unti l the roll pin is well situated , turn the camshaft to gain
enough space for the rol l pin to clear the breaker frame.
Before removing the ratchet note the position of the
ratchet rol ler or mark the ratchet hub and the camshaft.
When replacing the ratchet, be sure it i s oriented with
respect to the camshaft as it was originally and not d isplac­
ed 1 80 degrees. Align the mark made on the hub with the
mark on the camshaft or position the rol ler as it was. If the
ratchet is displaced 1 80 degrees, the holes in the ratchet
hub will not completely line up with the holes in the cam­
shaft.
The d riving pawl is assem bled to the c h arg i n g motor
drive pin as shown in Fig. 36B. To replace the d riving pawl:
1 . Remove the charging motor.
2. Remove the retaining ring from the drive pin. Sl ip off
the components.
3. Wipe off any grease or dirt from the drive pin.
LUBRICA TE.
4. I nstal l the components as shown.
28
The W-relay must also be un­
The upper rear mounting
Before this
DO NOT
2
1 . RETA I N ER RING
2. WASHER .01 0 "
3. PAWL ASM
FIG. 36B - DRIVING PAWL ASSEMBLY DETAILS
The holding pawl pivots on a pin which is assembled to
the mechanism frame. Refer to Fig. 36C. To replace the
holding pawl:
1 . Remove the front escutcheon for accessibi l ity.
2. Using the maintenance handle, rotate the ratchet
enough to disengage the hold ing pawl.
3. Remove the retaining ring and washer from the pivot
pin.
4. While holding the spri ng pressure from the holding
pawl, remove the existing pawl and slip on the new pawl.
5. Instal l the washer and retai ning ring.
Slow­
6. Verify that the holding pawl engages a minimum of 4
ratchet laminations.
7. Verify that the holding pawl pivot pin is perpendicular
to the mechanism frame. The hardware which assembles
the pivot pin to the frame must be torqued to 250 i n-lbs
minimum. If this hardware m ust be retightened, add
290
TITE to the shaft threads.
8. Install the front escutcheon. Tighten the escutcheon
80
hardware to
1. MECHANISM FRAME
2. PIVOT PIN
3. SPRING
4. WASHER .032 "
FIG. 36C - HOLDING PAWL ASSEM BLY DETAILS
5
4
4. SPRING WAS H ER
5 . WASHER .032 "
MOTOR DRIVE PIN
6.
±
1 0 in-lbs.
5. PAWL ASM
WASHER .01 0 "
6.
RETAI N I N G R I N G
7 .
LOC­
6
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