The John Deere 4630 tractor is part of a series of tractors that includes the John Deere 4230 and John Deere 4430. The John Deere 4630 is a second generation two-wheel drive or four-wheel drive row crop tractor. The JD 4630 engine was designed and built by JD Corporation and produced by John Deere in Waterloo, Iowa, USA from 1973 to 1977. The engine was a water-cooled, six-cylinder engine. The engine uses a dual paper air filter to clean the intake air and prevent particles from entering the combustion chamber, as they can clog the engine and reduce performance. The engine has a compression ratio of 16:1 and a total displacement of 6.6 liters. The engine has a maximum output of 150 hp.
The fuel tank of the John Deere 4630 is very large, holding 246 liters (65 US gallons) of diesel fuel. The John Deere 4630 is a serious workhorse with a class 3 three-point hitch. The maximum safe load of this crane is 2385 kg (5260 lbs). The total weight of this tractor is 7271 kg, but it will be heavier with ballast installed. Each rear tire is 18.4-38 (18.4 inches wide with a 38-inch rim diameter) and the front wheels are 10-16 (10 inches wide with a 16-inch rim diameter).
The John Deere 4630 tractor’s enclosed center hydraulic system drives the rear linkage and optional front loader. The wheels are driven by the engine, which transmits power through three different transmissions: the first is the JD Synchro-Range partial synchromesh transmission with eight forward and two reverse gears; the second option is the JD Synchro-Range four-speed transmission, which gives the JD 4630 tractor 16 forward and six reverse gears. The final option is the JD PowerShift transmission, which offers eight forward and four reverse gears.
The John Deere 4630 row crop tractor uses a John Deere engine: a 6.6-liter six-cylinder turbo-cooled diesel engine with a bore of 6,620 square centimeters, a cylinder diameter of 108.0 millimeters and a piston stroke of 120.0 millimeters. The John Deere engine has a rated compression ratio of 15.1:1.
John Deere’s engines are equipped with a direct injection fuel system, a dry air filter with secondary elements, an ether injection preheating system, a full-flow lubrication system with bypass channels and microelectronic filter elements, a pressurized cooling system with a centrifugal pump and thermostatic heating control, an electric starter made by Delco Remy and a fuel tank. Delco-Remy electric starter. The engine had a maximum output of 166 PS (122 KW, 164 hp).
From 1973 to 1977, John Deere produced the Model 4630 in the United States with a Sound-Gard air-conditioned cab. Perhaps the most significant and noticeable change in the second generation of tractors was the Sound-Gard cab. Not only did it provide unparalleled sound insulation and comfort, but it also offered unprecedented rollover protection in a stylish and comfortable cab. The cab is completely isolated from the tractor by four massive rubber mounts, which in turn isolate it from the seat and controls. The driver is surrounded by tempered glass but protected by a Rollover Protection Structure (ROPS) consisting of four struts that support the cab. The cab is pressurized to protect it from debris. Optional heaters and air conditioning are provided.
Comfort is very important as we grind on rough ground for 10 to 12 hours a day. In those days you could buy second generation tractors without cabs, but they were few and far between. Soundguard cabs convinced many convinced farmers of it.
With the second generation tractors, we not only had a great cab, but a great range as well. The entire range was redesigned and several new models were introduced. The styling was also changed with a sloping hood to improve visibility and give it a more modern look. Most of the tractors were improved, including a change of brand name, leading to a series 46 tractor with over 100 hp, but we had to go back a few years to get to that stage.
The John Deere 4630 Sprinter features a 165 hp 6.8-liter Powertech E diesel engine with a 5 percent increase in power output. This engine combines the power needed to meet energy standards with low emissions and features 12-valve heads and a fixed-geometry turbocharger for optimum performance.
- John Deere 4630 2WD
- John Deere 4630 4WD
The technology is not suitable for routine maintenance as even something as trivial as removing the starter is a nightmare and the 1000rpm PTO is not practical for a tractor of this size unless you use it as a leaf blower.
In the mid 90’s when my dad ran the farm we had a 4430 tractor. In the spring, when the wheat harvest was over, I was hoping to get a nice 4630 that had extra weight and drove two axles. The only drawback for me is that the PTO is only 1000 rpm. All my hay equipment is 540, so I will continue to use the 4020 for hay. But in terms of power, ….. I don’t think you can beat the .4630.
I have one and it’s the biggest tractor I’ve ever owned and I love it, the 404 is a little hard to start in cold weather, but other than that it’s a good tractor.
My grandfather had one in the 80’s and had no problems after 7000 hours of operation. He always said it was a tough compromise on the front auxiliary tank. …… Without it we would have been short of fuel for the day and with it we would have been short of weight at the end of the day due to fuel consumption and lack of weight racks. We can only carry one or the other. He also says he doesn’t like starting the car in the cold. Other than that, he is a good horse.