IMPORTANT FOR ALL COUPLERS: View Break-In Instructions
View Written Investment Cast Coupler Instructions
START HERE: View FC87, HC87 and Investment Cast Instructions
View RC87K, RN87K, RNB87K, RNC87K Instructions
Download Steam Pilot Instructions
View ET1P87K BLI Pilot Instructions
View ET2P87A BLI PRR Drop Coupler Instructions
Download Original Sergent Engineering Steam Pocket Instructions
Download "Sergent Coupler Modifications - Enlarge Hole, Thin Shank" By John P Lomenzo Jr.
Download "Sergent Couplers - Painting, Assembly and Weathering" By John P Lomenzo Jr.
If you have instructions or documentation you would like shared here please email us at prototypecouplers@gmail.com.