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38766R-SUB 

Synchron Replacement 2 Wire Spring Return Damper Motor Replaces 38766R, 39154R, and 37789R Synchron Motors









Synchron Motor number 38766R has become very difficult to obtain due to a manufacturing shortage not expected to recover until 2022. However, we offer two Belimo kits designed to replace the SUB motor at about the same cost, which mount a far more robust Belimo commercial motors in the place of the old Synchron motor. Both Belimo kits carry a 5 year warranty and will far outperform the original motor.


Use the LMB Kit 4 (three wire upgrade) or TFB Kit 4 (uses the two original wires) 

Synchron motor replacement p/n 38766R - SUB for the obsolete or difficult to find 38766Rand other motor numbers shown above. Please do not order unless your motor matches the numbers above.


This is another quality substitution motor that we have developed to keep you damper going and not require full damper replacement. Quality Synchron motor has the same specification to the 38766R,39154R, and 37789R motor you are replacing. 


Also look at our Kit 4 Belimo replacement Motor for this application.


* Buyer pays return shipping in all cases.


* Can't find the right motor? Send an email message to us at: support@retrozone.com.


* All motors are new inventory, 1 year warranty, and come with full service and support.