Hofmann ATC 900, Service Manual

Page: 17 / 120

CTC-CEN Service Manual 07-13 Rev.E
17

Select the multimeter in Ohm and check if there is continuity between all terminals of the motor. If there
continuity the motor must be replaced.
TO REPLACE THE CENTERPOST MOTOR:

Remove the two bolts in the bottom to get the motor assembly free.

Remove the pulley set screws.

Remove the pulley by using an extractor tool.

Remove the motor from its support.

Take the new motor.

Install the pulley by using rubber hammer.
NOTE:
The mounting of the new pulley must be done very carefully in
order to avoid motor bearings damaging.

Install the motor on its support.

Install the motor assy on the machine and lock it firmly.

Mount the belt.

Adjust the belt tension

Connect the wires FIRMLY to motor terminals following the
voltage at which the machine is supplied.
NOTE: Before connecting the wires ends, tighten all terminals
nuts.

Plug the machine to the wall.

Turn the machine on.
MACHINE UNDER TENSION DANGER
OF ELECTRIC SHOCK

Check the rotation way of the motor: If it is wrong reverse only two centerpost motor wires.

Turn the machine off and unplug it from the wall.

Mount the motor terminals cover.
IMPORTANT: WHEN REMOUNTING THE MOTOR TERMINALS COVER BE CAREFUL NOT TO CRUSH
WIRES.

Mount all protections and covers.

Turn the machine on again and check if it works fine again.
5.5 LOWER BEAD BREAKER ARM ACTUATOR M1 EAA0377G02A: CHECK AND
REPLACEMENT

: 1,5h

: End keys 13, medium cross screwdriver, 4 and 5mm allen key, multimeter.

: Defective actuator motor may cause the following malfunction:
1. The lower bead breaker arm does not move forward and backward.
TO CHECK THE MOTOR:

Before working on the actuator, make sure that the bead breaker arm is unlocked, cleaned and without any
scratching.

Disconnect machine from power supply.

Open the electric box.

Disconnect the actuator plug from the connector X3 of the CPU board.

Turn the machine on.
MACHINE UNDER TENSION DANGER OF ELECTRIC SHOCK