It is normal for an OHLA to run warm or perhaps even ‘hot’.  Heat in the OHLA may be generated by the load, speed, lubrication method, and/or ambient temperature in the application.  Running an OHLA with no load may also cause excessive heat.  If you suspect your OHLA may be running excessively hot, you can use a temperature probe or infrared thermometer to check the operating temperature.  Standard OHLA units are designed to operate between -40°F to +212°F (-40°C to +100°C).  If your OHLA is running hotter, please contact the factory to discuss your application and the lubrication for the OHLA.