Sports Attsck Junior Hack Attack - Component Replacement; Throwing Wheel and Motor Replacement

JUNIOR H ACK ATTACK
™
BASEBALL PITCHING MACHINE
SPORTS ATTACK, LLC. • 800-717-4251 • sportsattack.com
11
COMPONENT REPLACEMENT
THROWING WHEEL REPLACEMENT
1. Turn the on/off switch “OFF” and unplug the power cord. For the bottom throwing
wheel, remove 3 bolts holding the ball chute to the main casting.
2. Hold the wheel so that it cannot move. Turn the keyway retaining bolt counter-clockwise
using a box end wrench.
SUGGESTION: If the bolt is too tight, give the opposite end of the wrench a series of
light taps with a hammer making sure the wrench remains on the bolt.
3. Remove the bolt and washers.
4. Work the wheel off of the motor shaft. Be sure to catch the key as it is freed from
the keyway.
5. Ball throwing wheels are machine balanced. Small holes in the side of the wheel are
applied at the factory and are normal.
Reassemble in reverse order.
a. Install wheel to motor shaft with key slots aligned.
b. Be sure the key is in place, and inserted so that it is flush with the boss at the
wheel center.
c. Be sure the washer and lock washer are installed in the right order, and that the
keyway retaining bolt is tightened.
d. Test the wheel by spinning it by hand and making sure that it spins freely without
wobble before turning the unit “ON.”
e. Be sure the wheel guard is properly and securely reinstalled.
MOTOR REPLACEMENT
1. Turn the on/off switch “OFF” and unplug the power cord.
2. Remove the throwing wheel (see above).
3. Remove four screws holding controller into main casting. Note the position of the motor
wires on the controller, then disconnect the wires. See Figure 12 on page 12.
4. Note the routing of the motor wires. Loosen any wire clamps.
5. Remove four bolts holding the motor to the main casting. See Figure 9 and 10 on page 11.
Reassemble in reverse order.
Component Replacement
NOTE: On the bottom wheel, the ball
chute assembly (part 14 on page 13)
must be removed prior to the
removal
of the motor or
ball-throwing wheel
Hold wheel while loosening bolts.
NOTE: Check bolts for tightness once a season. Tighten bolts securely, but do not over-tighten.
When replacing the motor,
you will see two sets of bolts:
2 -
1
/
4
” x 1” coarse thread bolts
2 -
5
/
16
” x 1” coarse thread bolts
The wrench or socket size needed
for the
1
/
4
” bolt is a
7
/
16
”.
The wrench or socket size needed
for the
5
/
16
” bolt is a
1
/
2
”.
Figure 9 Shown using a 6” extension with
1
/
2
” socket. Figure 10 Shown using a 6” extension with
7
/
16
” socket.
1/2” KEYWAY
RETAINING BOLT
LOCK WASHER
FLAT WASHER
KEY
MOTOR
THROWING
WHEEL
HOLES DRILLED
FOR BALANCE