Component Replacement - GE AKR-30 Series Maintenance Manual

SECTION 7-Breaker Maintenance (Cont.)
7.1 2.1 COM PONENT REPLACEMENT
To gai n access to the electrical control com ponents,
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 should 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 pulled forward from between the
mechanism side plates.
fastened from the left side frame to allow enough freedom
for all the devices and the wiri ng 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
t ing bracket and then d isconnect 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 frame.
bolt i s 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 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 rol l pin which fastens it to the camshaft. Before this
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,
until 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 is 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 roller as it was. If the
ratchet is displaced 180 degrees, the holes in the ratchet
hub will not completely line up with the holes i n the cam­
shaft.
The d riving pawl is assembled to the ch arg i n g motor
drive pin as shown in Fig. 36B. To replace the driving pawl:
1 . Remove the charging motor.
2. Remove the retai ning ring from the drive pin. Sl i p off
the components.
3. Wipe off any grease or d i rt from the drive pin.
LUBRICA TE.
4. Install the components as shown.
28
The W-relay m ust also be un­
The upper rear mounting
DO NOT
2
1 . RETA I N E R R I N G
2. WASHER .01 0 "
3. PAWL ASM
FIG. 36B - DRIVING PAWL ASSEMBLY DETAILS
The holding pawl pivots on a pin wh ich is assembled to
the mechanism frame. Refer to Fig. 36C. To replace the
hold ing pawl:
1 . Remove the front escutcheon for accessibility.
2. Using the maintenance handle, rotate the ratchet
enough to d isengage the holdi ng pawl.
3. Remove the retaining ring and washer from the pivot
pin.
4. Wh ile 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.
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 wh ich assembles
the pivot pin to the frame m ust be torqued to 250 in-lbs
minimum. If this hardware must be retightened, add LOC
290
TITE to the shaft threads.
8. Install the front escutcheon. Tighten the escutcheon
hardware to 80
1 . MECHANISM FRA M E
2. PIVOT PIN
3. SPRI NG
4 . WASHER .032 "
FIG. 36C - HOLDING PAWL ASSEMBLY DETAILS
5
4
4. SPRI NG WASH ER
5.
WAS H E R .032 "
6. MOTOR DRIVE PIN
±
10 in-lbs.
3
4
5. PAWL ASM
6. WAS HER .01 0 "
RETA I N I N G R I N G
7.
6
7
5