WORKS ON THESE MODELS: 

Health Rider
70T - HRTL70014C8

NordicTrack
T 6.7 S - 831.248609
T 6.7C - 831.2502313

ProForm
POWER 545I - PETL798174
525 CT - PFTL496170
PREMIER 500 - PFTL591170
PREMIER 500 - PFTL591171
PREMIER 500 - PFTL59117C1
PERFORMANCE 400I - PFTL595154
505 CST - PFTL609166
505 CST - PFTL60916.5