Hofmann ATC 900, Service Manual

Page: 16 / 120

CTC-CEN Service Manual 07-13 Rev.E
16
TO REPLACE THE CABLE:

Release cable strain relief on the electric box and on the motor.

Take the wrong cable away.

Insert the new cable through the strain relief.
IMPORTANT! USE ONLY APPROVED CABLE. GROUND WIRE MUST BE LITTLE
LONGER THAN THE OTHER ONES TO ALLOW THE GROUND IN CASE OF PHASE
CABLE BREAKAGE.
NOTE: Before connecting the wires ends, tighten all terminals nuts on the motor.

Fix new fastons to the cable ends.

Connect the wires to the motor and inverter terminals.

Mount the motor terminal cover and the electronic box cover.
IMPORTANT: WHEN REMOUNTING THE MOTOR TERMINALS COVER BE CAREFUL NOT TO CRUSH
WIRES.

Plug the machine to wall.

Turn the machine on and check if it works fine.

Mount the front motor cover.
5.4 CENTERPOST MOTOR M3 # 2-49166A AND BELT # 8-06831A: CHECK AND
REPLACEMENT

: 1h

: End keys 13,17mm, medium cross screwdriver, 7mm tube type wrenches, 3 and 4mm allen key, multimeter,
loctite, extractor.

: Defective centerpost motor may cause the following malfunction:
1. Motor is noisy.
2. Motor is burnt.
3. Low turntable torque.
TO CECK THE CENTERPOST MOTOR WHEN IT SHOWS LOW TORQUE OR IT IS NOISY:

Refer to paragraph 5.3
TO CHECK THE CENTERPOST MOTOR WHEN IT IS NOISY:

Disconnect power supply from the wall.


Remove the front motor protection to access to the centerpost motor

5.3.

Loosen the 12mm nuts to get motor loose and remove the belt.

Insert a screwdriver through the fan protection and turn
the motor pulley by hand to make sure that the fan is well blocked
to the motor shaft.

Plug the machine to the power supply.

Turn the machine on.
MACHINE UNDER TENSION DANGER
OF ELECTRIC SHOCK

Run the centerpost motor to verify if it is noisy
TO CHECK THE CENTERPOST MOTOR WHEN IT IS BURNT:

Refer to paragraph 5.3 to make sure about the wiring and the cable.

Remove all wires and connections from the motor terminal.