Engine Description
Note: When you are ordering new parts, refer to the engine identification number in order to receive the correct parts.
The 3003, 3013, 3014 and 3024 engines are diesel engines that are controlled with a mechanically actuated fuel injection pump. The engine cylinders are arranged in-line.
The cylinder head assembly has one inlet valve and one exhaust valve for each cylinder. Each cylinder valve has a single valve spring. The pistons have two compression rings and an oil control ring.
It is important to ensure the correct piston height so that the piston does not contact the cylinder head. The correct piston height also ensures the efficient combustion of fuel which is necessary in order to conform to requirements for emissions.
The crankshaft for a three cylinder engine has four main journals. The crankshaft for a four cylinder engine has five main journals. End play is controlled by thrust washers that are located on the rear main bearing.
The timing gears are stamped with timing marks in order to ensure the correct alignment of the gears during assembly. When the No. 1 piston is at top center compression stroke, the teeth that are stamped on the crankshaft gear and the camshaft gear will be in alignment with the idler gear.
The crankshaft gear turns the idler gear which then turns the following gears: the camshaft gear and the gear for the lubricating oil pump.
The fuel injection pump is mounted on the cylinder block. The fuel injection pump is operated by the camshaft lobes. The fuel transfer pump is located on the right hand side of the cylinder block. The fuel transfer pump is operated by the camshaft lobes.
The fuel injection pump conforms to requirements for emissions. Adjustments to the fuel injection pump timing and high idle should only be made by trained personnel. The fuel injection pumps have mechanical governors that control the engine rpm.
A gerotor type engine oil pump is located in the center of the idler gear. The engine oil pump sends lubricating oil to the main oil gallery through an oil relief valve. The oil relief valve is located on the right side of the cylinder block. The rocker arms receive pressurized oil through an externally located oil line. The oil line runs from the main oil gallery to the cylinder head.
Coolant from the bottom of the radiator passes through the belt driven centrifugal water pump. The coolant is cooled by the radiator and the temperature is regulated by a water temperature regulator.
Lifting the Engine
| NOTICE |
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Failure to follow recommended procedures for handling or transporting engines can lead to engine damage. To avoid possible engine damage, use the following procedure. |
When you are lifting or moving the engine, use the following procedures in order to prevent engine damage.
- Do not tilt the engine to an extreme angle unless the lubricating oil is first drained from the oil pan.
- Do not turn the engine onto a side or an end surface unless the lubricating oil is first drained from the oil pan.
- If the oil is not drained prior to tilting the engine or turning the engine onto a side or an end surface, the lubricating oil from the oil pan can flow into the intake manifold and the cylinder bores. This situation could cause a hydraulic lock in the engine. Hydraulic lock can severely damage the engine.
- The engine oil should be refilled to the correct level before the engine is started.
Engine Model Views
3 Cylinder Engines
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| Illustration 1 | g00572298 |
Typical example of left side of a three cylinder engine (1) Oil filler cap (2) Air inlet manifold (3) Engine lifting eye (4) Water pump (5) Water temperature switch (6) Exhaust manifold (7) Fan (8) Starting motor solenoid (9) Alternator (10) Electric starting motor (11) Crankshaft pulley (12) Flywheel | |
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| Illustration 2 | g00572295 |
Typical example of right side of a three cylinder engine (13) Fuel return line (14) Crankcase breather (15) Fuel injection nozzle (16) Fuel injection pump (17) Oil temperature switch (18) Fuel shutoff solenoid (19) Fuel supply connection (20) Fuel setting adjustment screw (21) Mechanical fuel shutoff (22) Fuel transfer pump (23) High idle adjustment screw (24) Low idle adjustment screw (25) High idle adjustment screw (26) Coolant drain plug (27) Fuel control lever (28) Engine oil filter (29) Engine oil relief valve (30) Serial number plate (31) Oil pan (32) Drain plug | |
4 Cylinder Engines
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| Illustration 3 | g00581109 |
Typical example of left side of a four cylinder engine (1) Air inlet manifold (2) Oil filler cap (3) Water pump (4) Lifting eye (5) Water temperature switch (6) Exhaust manifold (7) Fan (8) Starting motor solenoid (9) Alternator (10) Electric starting motor (11) Crankshaft pulley (12) Flywheel housing (13) Oil pan (14) Drain plug | |
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| Illustration 4 | g00749471 |
Typical example of right side of a four cylinder engine (15) Engine oil pressure sensor (16) Crankcase breather (17) Lifting eye (18) Fuel injection nozzle (19) Fuel return line (20) Fuel injection pump (21) Fuel shutoff solenoid (22) Mechanical fuel shutoff (23) Fuel transfer pump (24) Fuel control lever (25) Engine oil filter (26) Serial number plate (27) Oil level gauge | |