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John Deere Serial Number Classifications
A unique feature of John Deere engines is that the engines are designated differently based upon the type of the air intake systems used in its varied industrial, construction, agricultural, oil and gas or other applications. Understanding these different designations is crucial in deciphering the application of the engine and in identifying the correct maintenance parts.
The five (5) different designations that are used for John Deere engines are D, T, A, S and H. The D is the oldest and simplest air intake system for John Deere engines. This is a an engine whereby the reciprocating positions will pull air into the air intake system directly through an air filter, and directly into the combustion chamber where combustion occurs.
The T designated engines are all turbocharged engines. The turbocharged engine process was a later addition to the “D” engines to reduce fuel combustion and boost engine power. The turbocharged unit is fitted between the air intake system and the ducts leading to the combustion chamber. Exhaust gases are channeled through radial placed vanes on a shaft, which produced motion in one side of the turbocharged unit. The central shaft then turns a compressor in the second section of the turbocharger, pulling filtered air in and compressing it to a high density. The high density air is then compressed into the combustion chamber. The higher air density ensures more efficient fuel combustion and improved fuel economy.
The third John Deere engine designation is A. The A abbreviation is an indication that the engine is fitted with a turbocharger and an Aftercooler, and the cooling medium in the engine is air to water/coolant. The aftercooler is a cooling device like a radiator with its cooling medium being coolant or water.
In the John Deere 4650 tractor, the intercooler fits into the intake manifold of the engine and cools the compressed air that’s being routed from the turbocharger before it enters the combustion chamber. In the turbocharger, the compressed air makes it denser; however, the temperature of the air has also increased. However, hot air will expand less when burned in the combustion chamber and may also cause diesel knock. The liquid coolant intercooler is used to reduce the temperature of the compressed air to prevent these combustion problems.
The H designation John Deere engine abbreviation is another option to the A engine in that the engine is fitted with an intercooler, however, the cooling medium in the H engine is air. Ambient air is forced into the tubes of the intercooler, absorbing the heat of the compressed turbocharged air, and then being discharged. The H engine aftercooling system is called “air to air".
The final designation of John Deere engines is the S designation. The S John Deere engines are the marine engines, and the S symbol indicates that the marine engine is turbocharged and aftercooled, however cooled by a combination of air and seawater. There are different configurations of this cooling system, which may include additional pumps and pipes to pull in seawater and then to expel the heated water back into the river or sea.
Ontario Parts Hotline is a major provider of aftermarket John Deere Parts and Massey Ferguson Parts
The five (5) different designations that are used for John Deere engines are D, T, A, S and H. The D is the oldest and simplest air intake system for John Deere engines. This is a an engine whereby the reciprocating positions will pull air into the air intake system directly through an air filter, and directly into the combustion chamber where combustion occurs.
The T designated engines are all turbocharged engines. The turbocharged engine process was a later addition to the “D” engines to reduce fuel combustion and boost engine power. The turbocharged unit is fitted between the air intake system and the ducts leading to the combustion chamber. Exhaust gases are channeled through radial placed vanes on a shaft, which produced motion in one side of the turbocharged unit. The central shaft then turns a compressor in the second section of the turbocharger, pulling filtered air in and compressing it to a high density. The high density air is then compressed into the combustion chamber. The higher air density ensures more efficient fuel combustion and improved fuel economy.
The third John Deere engine designation is A. The A abbreviation is an indication that the engine is fitted with a turbocharger and an Aftercooler, and the cooling medium in the engine is air to water/coolant. The aftercooler is a cooling device like a radiator with its cooling medium being coolant or water.
In the John Deere 4650 tractor, the intercooler fits into the intake manifold of the engine and cools the compressed air that’s being routed from the turbocharger before it enters the combustion chamber. In the turbocharger, the compressed air makes it denser; however, the temperature of the air has also increased. However, hot air will expand less when burned in the combustion chamber and may also cause diesel knock. The liquid coolant intercooler is used to reduce the temperature of the compressed air to prevent these combustion problems.
The H designation John Deere engine abbreviation is another option to the A engine in that the engine is fitted with an intercooler, however, the cooling medium in the H engine is air. Ambient air is forced into the tubes of the intercooler, absorbing the heat of the compressed turbocharged air, and then being discharged. The H engine aftercooling system is called “air to air".
The final designation of John Deere engines is the S designation. The S John Deere engines are the marine engines, and the S symbol indicates that the marine engine is turbocharged and aftercooled, however cooled by a combination of air and seawater. There are different configurations of this cooling system, which may include additional pumps and pipes to pull in seawater and then to expel the heated water back into the river or sea.
Ontario Parts Hotline is a major provider of aftermarket John Deere Parts and Massey Ferguson Parts
Ford 7000 Tractor
The Ford 7000 Tractor was manufactured between 1971 to 1975. The engine is a four (4) cylinder diesel turbocharged engine, producing ninety four (94) hp of power. Ford tractor parts for the engine can be wither standard or over-sized pistons, rings, main bearings, and/or connecting rod bearings. As is typical with most Ford engines, there are no sleeves in the kit as Ford tractors are the sleeveless engines whereby the pistons and rings are fitted directly into the engine block.
It's PTO shaft can be either the 540 rpm type, or there is an option to have the 1000 rpm PTO shaft. This is a two wheel drive tractor, with manual steering and an optional hydrostatic power attachment on some models.
The electrical system is powered by a negative ground 12V system, producing a maximum of 51 amps of DC power, and charging a 12V 128 AH battery in the process. The alternator is a Mo/Pres model.
The 7000 Ford tractor water pump selection can be a little troublesome without a parts manual to provide a part number. Ford tractor parts for the cooling system and specifically the water pumps, will need to be chosen based on the serial number of the tractor. Tractors built between 1965 to 1975 will have two different water pumps-one with a double pulley and one with a single pulley.
Seats for the 7000 Ford tractor can come in a variation of patterns and colors. There are the blue or black vinyl pan seats, the complete seat with a suspension system, or a newer custom seat from the aftermarket suppliers.
Ontario Parts Hotline is a major provider of aftermarket John Deere Parts and Ford tractor parts
It's PTO shaft can be either the 540 rpm type, or there is an option to have the 1000 rpm PTO shaft. This is a two wheel drive tractor, with manual steering and an optional hydrostatic power attachment on some models.
The electrical system is powered by a negative ground 12V system, producing a maximum of 51 amps of DC power, and charging a 12V 128 AH battery in the process. The alternator is a Mo/Pres model.
The 7000 Ford tractor water pump selection can be a little troublesome without a parts manual to provide a part number. Ford tractor parts for the cooling system and specifically the water pumps, will need to be chosen based on the serial number of the tractor. Tractors built between 1965 to 1975 will have two different water pumps-one with a double pulley and one with a single pulley.
Seats for the 7000 Ford tractor can come in a variation of patterns and colors. There are the blue or black vinyl pan seats, the complete seat with a suspension system, or a newer custom seat from the aftermarket suppliers.
Ontario Parts Hotline is a major provider of aftermarket John Deere Parts and Ford tractor parts
What is a Long Block and How Is It Best Used
Repairing an engine by a complete overhaul is a popular way of maintaining tractor engines, and ensuring continuous problem free operation of heavy duty machines. However, the overhaul process can take a minimum of five (5) days if all of the parts are readily available for the overhaul, and typically approximately ten (10) days for the complete overhaul to be completed, with the additional time to procure the parts needed for the overhaul.
Depending on what needs to be repaired on the old engine, a complete block assembly engine, or a long block as it is sometimes called, can be faster repair job for a tractor engine that requires a new block and a cylinder head.
The short block comprises of the cylinder block and the crankcase connected by a connecting rod and precision heavy duty welding. The long block is the next level in engine repair, as compared to the short block. The long block has additional components that make repairs less tedious.
The most significant addition that makes up the long block is the cylinder head. This is bolted to the top of the cylinder block by head bolts and sealed with a head gasket. Depending on the engine model and manufacturing company, the cylinder head can contain a section of the combustion chamber. All will have the intake valves, exhaust vales, valve springs, valve keepers, and the rocker arm assembly. The rocker arm assembly comprises of the rocker arm shaft, tappets, push rods, and the rocker arms. The camshaft assembly in the crankcase moves the push rods which mechanically operates the rocker arm assembly.
Both the long block and the short block will have the front gear train, with pulleys and chains. However, the long block will have the front plate, which is a protective covering for the gear train components.
In some models, the rear seal housing with the seal is provided. For example, the 6081 John Deere engine long block, this housing is provided as a part of the complete engine assembly.
The oil pump and oil pump accessories are another pertinent addition to the long block assembly. The exact location of the oil pump varies by engine type and manufacturer, however, a large percentage of oil pumps are fitted in the lower section of the crankcase, with an oil filler tube extending downwards into the area where the oil pan will be located. At the bottom of this filler tube, is fitted an oil strainer.
The long block would have been fitted internally with many gaskets, including the front gear train gasket, the oil pump gasket, the head gasket, and a few others. However, since there will be many engine accessories to be added to the external parts of the engine, a complete gasket kit is normally shipped with the engine assembly. This will include gaskets for the exhaust and intake manifolds, water pump, fuel pump and fuel transfer pumps.
For completely remanufactured engine assemblies that were rebuilt to OEM specifications, all internal components used in the rebuilt process will be new components, with the exception of the blocks, cylinder head, and crankshaft which are typically rebuilt to OEM specifications and reused.
Easy Tractor Parts is a major supplier of John Deere Parts and John Deere Tractor Parts
Depending on what needs to be repaired on the old engine, a complete block assembly engine, or a long block as it is sometimes called, can be faster repair job for a tractor engine that requires a new block and a cylinder head.
The short block comprises of the cylinder block and the crankcase connected by a connecting rod and precision heavy duty welding. The long block is the next level in engine repair, as compared to the short block. The long block has additional components that make repairs less tedious.
The most significant addition that makes up the long block is the cylinder head. This is bolted to the top of the cylinder block by head bolts and sealed with a head gasket. Depending on the engine model and manufacturing company, the cylinder head can contain a section of the combustion chamber. All will have the intake valves, exhaust vales, valve springs, valve keepers, and the rocker arm assembly. The rocker arm assembly comprises of the rocker arm shaft, tappets, push rods, and the rocker arms. The camshaft assembly in the crankcase moves the push rods which mechanically operates the rocker arm assembly.
Both the long block and the short block will have the front gear train, with pulleys and chains. However, the long block will have the front plate, which is a protective covering for the gear train components.
In some models, the rear seal housing with the seal is provided. For example, the 6081 John Deere engine long block, this housing is provided as a part of the complete engine assembly.
The oil pump and oil pump accessories are another pertinent addition to the long block assembly. The exact location of the oil pump varies by engine type and manufacturer, however, a large percentage of oil pumps are fitted in the lower section of the crankcase, with an oil filler tube extending downwards into the area where the oil pan will be located. At the bottom of this filler tube, is fitted an oil strainer.
The long block would have been fitted internally with many gaskets, including the front gear train gasket, the oil pump gasket, the head gasket, and a few others. However, since there will be many engine accessories to be added to the external parts of the engine, a complete gasket kit is normally shipped with the engine assembly. This will include gaskets for the exhaust and intake manifolds, water pump, fuel pump and fuel transfer pumps.
For completely remanufactured engine assemblies that were rebuilt to OEM specifications, all internal components used in the rebuilt process will be new components, with the exception of the blocks, cylinder head, and crankshaft which are typically rebuilt to OEM specifications and reused.
Easy Tractor Parts is a major supplier of John Deere Parts and John Deere Tractor Parts
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