Capacitors; Gearbox - Stoelting O231 Service Manual

C. DRIVE MOTOR INSTALLATION
1. Place the drive motor in position and install the four
mounting bolts.
2. Place the pulley and key on the motor shaft.
Do not tighten the pulley screws until after the belt
tension has been properly adjusted.
3. Install the belt and tighten the tension adjustment
bolt.
4. Use a Burroughs Belt Tension Gauge to set the
tension for the drive belt. Set the belt tension to 40
lbs.
5. Using a straightedge, align the drive motor pulley
with the gearbox pulley. Tighten the two allen head
screws.
6. Install wiring according to wiring diagram (located
behind the left side panel). Install electrical cover
plate on the motor.
7. Install back and side panels.
6.4

CAPACITORS

The compressor start and run capacitors are only on single
phase machines. They are accessible by removing the right
side panel.
The start and run capacitors for the drive motors are
mounted directly onto each motor body.
A. CAPACITOR TEST
1. Disconnect machine from electrical supply before
removing any panels for servicing.
WARNING
Hazardous voltage
Make sure the machine is off when disassembling
for servicing. The machine must be disconnected
from electrical supply before removing any access
panel. Failure to disconnect power before servicing
could result in death or serious injury.
2. Remove a lead from one of the capacitor terminals.
3. Using insulated pliers, discharge the capacitor by
connecting a 20KΩ 5W resistor across the
terminals.
Discharge the capacitor even if there is a bleeder
resistor across the terminals. There may be an open
in the bleeder resistor preventing it from working
properly.
NOTE
NOTE
4. Disconnect the bleeder resistor from the circuit.
5. Measure the capacitance across the terminals.
The results should be as follows:
Part
Drive Motor Start 230622
Drive Motor Run 231075
Compressor Start 231058
Compressor Run 231057
B. CAPACITOR REPLACEMENT
1. Disconnect machine from electrical supply before
removing any panels for servicing.
2. Remove leads from the capacitor terminals.
3. Using insulated pliers, discharge the capacitor
with a 20KΩ 5W resistor across the terminals.
Discharge the capacitor even if there is a bleeder
resistor across the terminals. There may be an open
in the bleeder resistor preventing it from working
properly.
4. Pull the capacitor out of its holder and replace.
5. Connect the leads to the terminals of the new
capacitor.
6.5

GEARBOX

A. GEARBOX INSPECTION
Inspect the gearbox and listen for unusual noise. A grinding
sound generally indicates a bad gear.
B. GEARBOX REMOVAL
1. Disconnect machine from electrical supply before
removing any panels for servicing.
2. Remove the back panel and the side panel.
3. Remove the belts.
4. Remove the bolts holding the gearbox assembly
and remove it.
C. GEARBOX INSTALLATION
1. Place the gearbox in position from the rear of the
machine. Fasten the bolts through the gearbox to
the rear of the barrel.
2. Mount the pulley on the gearbox shaft and align
with the motor pulley, then tighten the allen head
screws.
3. Install the belt.
4. Use a Burroughs Belt Tension Gauge to set the
tension for the drive belt. Set the belt tension to 40
lbs.
5. Using a straightedge, align the drive motor pulley
with the gearbox pulley. Tighten the two allen head
screws.
37
Rating
MFD VAC
200 MFD 250 VAC
30 MFD 370 VAC
145-174 MFD 250 VAC
35 MFD 370 VAC
NOTE