Gardner Bender B2555 Series Electric Sidewinder Bender - Manual (Page 11)

11
18.0 TROUBLESHOOTING
WARNING: ALWAYS disconnect power supply before removing any guards or covers and before servicing this bender. Failure to do so
may result in serious injury or death.
Problem Cause Diagnosis Cure
1. Bender will not operate Power source Check for voltage at power
source
If power is on, go to (#3)
2. No power at bender Bad power cord Ohm cord for broken wire Replace cord
3. Power to bender but will not
operate
Circuit breaker / power switch in
the off position
Check power on load side of
breaker to neutral with volt meter
Turn circuit breaker on. If on,
go to next step.
Fuse #1 blown Ohm circuit for short Replace
Control Transformer bad Check voltage in and out, if input
but no output
Replace
Contractor bad Check contacts and ohm coil for
open circuit
Replace
Bridge rectifier bad Check with ohm meter Replace
Switch bad Check with ohm meter Replace
Motor bad Check brushes and ohm for
open or short armature
Replace
4. Motor runs but will not bend Chain from gear box to jack
shaft broken
Remove cover and visually
check for broken parts
Replace
Bad gear box Motor running but no output
through gear box
Replace
Chain from jack shaft to shoe
sprocket broken
Remove cover and visually
check for broken parts
Replace
Key between motor and gear
box missing
Remove motor from gear box Replace key
5. Bender operates in one
direction only
Bad FWD / REV switch Ohm switch for open contact or
shorted contacts
Replace
Bad pendant cord Ohm for broken wire Replace
Bad contactor Check contacts and ohm coil for
open circuit
Replace
6. Contactors chatter Low power to bender Check with amp meter Do not use long drop cords