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Okuma OSP Controller
Lubrication · Intermediate
Okuma OSP Alarm B 2779 - Axis lube motor overload
The overload relay protecting the axis lubrication pump motor has tripped, so the lubrication system for the X/Z axes (or the cross rail on WCR machines) is not running. Continued axis motion without lubrication risks guideway damage.
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Okuma OSP Alarm B 2779 - Axis lube motor overload
Axis lube motor overload
The overload relay protecting the axis lubrication pump motor has tripped, so the lubrication system for the X/Z axes (or the cross rail on WCR machines) is not running. Continued axis motion without lubrication risks guideway damage.
Common Causes
- Tripped overload relay on the lubrication motor circuit
- Defective lubrication motor drawing excess current
- Lubrication pump binding or line blockage overloading the motor
Troubleshooting Steps
- 1Check the index shown with the alarm: no index means the X/Z-axis lubrication motor; 'WCR' means the cross rail lubrication motor.
- 2Isolate power and observe lockout before working in the electrical cabinet, then locate the lubrication motor overload relay and reset the tripped relay as the manual directs.
- 3After reset, run the lube pump and confirm it delivers oil; if the relay trips again quickly, the motor or pump is overloading.
- 4Check for a binding pump, blocked lube lines or metering units that would stall the motor, and clear or repair as needed.
- 5If the relay trips repeatedly with a clear lube circuit, replace the defective lubrication motor; if the alarm still returns, record the alarm number and index and contact Okuma service.
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