Categories JOHN DEERE John Deere 3940, 3950, 3960 and 3970 Forage Harvesters Service Repair Manual Post author By TQ3yS Post date Full manual link. Please click. → https://www.aservicemanualpdf.com/tm1203-John Deere 3940, 3950, 3960 and 3970 Forage Harvester ← John Deere 251 and 1550 Seeders Service Repair Manual → John Deere 1380 Mower Conditioner Service Repair Manual (tm1204)