The first David Brown 1390 Tractors went out of the factory gates in 1980 and they kept building them until 1984. Regardless of whether you initially got a deal on your tractor (lower than the initial price of $22,100 (1983)), with TractorJoe you'll get the best deal on the spare parts you need. You can find in our inventory every kind of spare part you might need to keep your David Brown 1390 Tractor running smoothly. Sometimes, the parts compatibility is determined by the serial number of your David Brown 1390 Tractor, and that info should be listed on the part fit notes. If you don't have the serial number of your tractor, you can find it on the right side of main frame. The serial number starts from 11120101 for a 1980 model, from 11122928 for a 1981 model, from 11126132 for a 1982 model, from 11130040 for a 1983 model. Some David Brown 1390 Tractors have a 4x2 2WD chassis, but there are also some with a 4x4 MFWD 4WD chassis, all equipped with hydrostatic power steering. They also have mechanical drum brakes. The type 2/1 3-point hitch is very reliable. It is also worth noting that the independent rear PTO runs at 540/1000 rpms. The David Brown 1390 has an open center hydraulics system with a 7.1 gal [26.9 L] capacity. The pump does the job pushing 15.3 gpm [57.9 lpm] fluids in the hydraulics system.