Vollrath Stoelting O431, Service Manual

Page: 48 / 75

40
11. Place the Main Power OFF/ON and Freezing
Cylinder OFF/ON switches in the OFF position.
12. Install the belt and tighten the tension bolt.
13. Use a Burroughs Belt Tension Gauge to set the
tension for the drive belt. Set the belt tension to
40-50 lbs.
14. Using a straightedge, align the drive motor pulley
with the gearbox pulley. Tighten the two allen
head screws.
B. DRIVE MOTOR REMOVAL
1. Disconnect machine from electrical supply before
removing any panels for servicing.
2. Remove the back panel and side panel.
3. Remove the electrical cover plate from the back
of the motor.
4. Identify (mark) wires and remove them from the
motor.
5. Remove the speed reducer support from the side
of the machine. (Refer to Figure 6-5)
6. Loosen the belt tension adjustment nut and remove
the belt. (Refer to Figure 6-5)
7. Remove the motor mounting bolts.
8. Loosen the two allen head screws from the pulley.
9. Remove the pulley and key from the motor shaft.
A. CONTACTOR TESTS
The following tests will show if a contactor is working
properly.
1.
Open header panel and visually check the
IntelliTec control board.
2. Check for a signal going to contactor. When the
spigot is opened or the Push To Freeze button is
pressed, the DRV LED on the control board will
light up. After three seconds, the CMP LED will
light up (Refer to Figure 6-4). If the LEDs do not
light up, refer to Section 7 Troubleshooting.
NOTE
In addition to the LEDs lighting, there will be an
audible click from the contactors and the motor and
compressor will start.
3. Check to ensure contactor is receiving signal.
Read voltage across the coils of the contactor
during a freezing cycle. Voltage should be about
115V. If there is no voltage reading, refer to Section
7 Troubleshooting.
6.3 DRIVE MOTOR
The drive motors are used to rotate the auger assemblies.
An internal, normally closed, centrifugal switch starts the
drive motor. The motors have an internal thermal overload.
A. DRIVE MOTOR TEST
1. Make sure the Main Freezer Power and the
Freezing Cylinder OFF/ON switches are in the
OFF position.
2. Remove the back panel and a side panel.
3. Loosen the belt tension adjustment nut and remove
the belt.
9. Start the drive motor.
10. Put a clamp ammeter on the motor wire at T1 of
the motor contactor. The ammeter should read
2.1 amps ±0.5.
NOTE
The motor amps are based on 230VAC supply
voltage.
Figure 6-4 IntelliTec LEDs
DRV LED
CMP LED
Figure 6-5 Motor Removal
Speed
Reducer
Support
Tension
Adjustment
Nut