The 2657565103 Atlas Copco OEM Drive Coupler is an OEM coupling for Atlas Copco portable compressor platforms. This coupling provides the engine-to-airend connection in select Atlas Copco portable units, using a Reich Arcusaflex ACH-series heavy-duty design suited for the torque demands of larger Atlas Copco machines.
Atlas Copco portable compressors serve construction, mining support, and industrial applications worldwide. The ACH-class coupling on this machine handles higher torque loads than standard-duty ACT couplers, reflecting the power output of the larger diesel engines in these units. The coupling absorbs engine vibration while transmitting torque smoothly to the airend under sustained load.
The 2657565103 is a direct OEM replacement. Install per Atlas Copco’s service procedure with proper alignment verification.
Available from Stark Industrial Products for Atlas Copco compressor service teams.









