Note On Cast-In Heaters - ITW Dynatec DYNAMINI Operation And Service Manual

Page 8-6
Revised 1/05
b.
Gear Pump and Motor Removal:
1. Disconnect the motor's electrical cable
from the ASU by unplugging it at the circuit
board
2. Remove the bolts and lockwashers which
connect the motor to the base of the unit.
3. Remove the two set screws located in the
coupling.
4. Loosen the coupling and lift out the motor.
5. To replace the gear pump, remove the four
nuts that hold the pump to the pump adapter
block.
6. Disconnect the coupling.
7. Remove the pump assembly from the end
of the unit.
8. For re-assembly: slide new pump onto the
four studs. Tighten the four nuts to secure the
pump. Torque should be approximately 21
Nm (15 ft/lb) at room temperature. With
pump and hopper at 177°C (350°F), the maxi-
mum allowable torque on these nuts is 41 Nm
(36 ft/lb).
c.
Gear Pump Seal (O-ring) Replacement:
1. Remove the pump from the ASU (see
instructions above, "a" or "b").
2. Remove the external pump seal (PN
069X064) from its groove on the back of the
pump adapter plate (this is the seal located
between the adapter plate and the hopper).
Reference the pump exploded-view illustra-
tion in Chapter 10 for your specific pump.
3. Install the new seal.
d.
Gear Pump Shaft Seal Replacement:
Remove the shaft key and the four socket
head cap screws holding the seal retainer
plate. The seal (069X061) is located between
the retainer plate and the front plate assembly.
Note on the Cast-in Heaters
(See illustration on page 10-11)
The cast-in heaters installed in the base of the
hopper are not replaceable and will last the
life of the ASU.
Gear Pump
to base
Capacitor Disconnect from terminal rail.
Motor mount
bracket
Shaft Seal
Shaft Key
Remove nuts to
release pump
from adapter.
Capacitor
RED
BROWN
ORANGE
BLACK
Gear Motor Wiring Diagram
ITW Dynatec c. 2004
DYNAMINI ASU Manual #20-25
Disconnect from terminal
rail
Motor bracket
screws
Remove set
screws to loosen
coupling.
Remove nuts to
release pump
from adapter.
Motor bracket screws
Remove set
screws to loosen
coupling.
Retainer plate
Front plate
assembly
O-ring
069X064
7
240vac: Blue Wire in
Terminal Block, No
WHITE
other Jumpers used.
120vac: Blue Wire in
BLUE (120v)
BLUE (240v)
Capacitor, Jumper
between Terminal
JUMPER (120v)
Blocks.
3