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CHASSIS AR 2278301 - Caterpillar

2278301 CHASSIS AR Caterpillar parts 623G CHASSIS
Alternative (cross code) number:
Caterpillar 2278301 CHASSIS AR

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Compatible equipment models: 2278301:

WHEEL TRACTOR  623G   Caterpillar
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Illustration 1 g00813899
Lubrication system schematic (typical example)
(1) Main engine oil gallery
(2) Engine oil gallery for the left camshaft
(3) Engine oil gallery for the right camshaft
(4) Engine oil gallery for the piston cooling jets
(5) Piston cooling jet
(6) Engine oil supply for the turbochargers
(7) Sequence valve
(8) Sequence valve
(9) Adapter
(10) Bypass valve
(11) Engine oil cooler
(12) Bypass valve
(13) Relief valve
(14) Engine oil pump
(15) Elbow
(16) Suction bell
(17) Engine oil filter housing Engine oil pump (14) has three gears that are driven by the front gear train. The engine oil pump pulls engine oil from the pan through suction bell (16) and elbow (15). The suction bell has a screen in order to strain the engine oil.Relief valve (13) controls the pressure of the engine oil from the engine oil pump. If the engine oil pressure from the pump becomes excessive, the relief valve opens and some of the engine oil returns to the engine oil pan. This prevents high pressure engine oil from damaging the O-ring seals for the engine oil cooler and the engine oil filter.Engine oil cooler (11) reduces the temperature of the engine oil. The engine oil cooler has bypass valve (12) that is designed to open at a differential pressure of 180 20 kPa (26 3 psi).
Illustration 2 g00813914
(10) Bypass valve
(17) Engine oil filter housing The engine oil filters are located in engine oil filter housing (17). Bypass valve (10) is located in the engine oil filter housing.When the engine is cold, the pressure forces the bypass valves open. This provides immediate lubrication to the engine when cold engine oil with high viscosity causes a restriction.After the engine warms up, the differential pressure on the bypass valves decreases and the bypass valves close. The engine oil flows normally through the engine oil cooler and through the engine oil filter.The bypass valves will also open if there is a restriction in the engine oil cooler or the engine oil filter. This allows the engine to be lubricated if the engine oil cooler is plugged or if the engine oil filter is dirty.Clean engine oil from the engine oil filters goes through adapter (9) into the block. Part of the engine oil goes to left camshaft oil gallery (2). The remainder of the engine oil goes to

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623G Wheel Tractor CES00001-UP (MACHINE) POWERED BY 3406E Engine

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