3387447 BRACKET Caterpillar parts
120K, 120K 2
Rating:
Alternative (cross code) number:
CA3387447
338-7447
3387447
CA3387447
338-7447
3387447
Weight: 61 pounds 27 kg.
MOTOR GRADER,
Information:
Illustration 1 g01107004
Basic air inlet and exhaust system (1) Inlet valves (2) Exhaust valves (3) Inlet manifold (4) Exhaust manifold (5) Aftercooler (6) Air inlet (7) Exhaust outlet (8) Compressor (9) TurbineThe components of the air inlet and exhaust system control the quality of air and the amount of air that is available for combustion. The air inlet and exhaust system consists of the following components:
Air cleaner
Turbocharger
Aftercooler
Cylinder head
Valves and valve system components
Piston and cylinder
Inlet manifold
Exhaust manifoldNote: The following description of the operation of the air inlet and exhaust system assumes that the engine is developing boost pressure. Inlet air passes through the air cleaner into the air inlet (6) of the turbocharger compressor (8) . A turbocharger is used in order to increase the flow of air into the engine. This increase in air flow pressurizes the combustion air supply for the engine. The pressure that is placed on the inlet air allows a larger volume of air to be compressed into the cylinder. This compressing of the inlet air is referred to as engine boost. The compressing of air causes the air temperature to rise to about 204 °C (400 °F). As the air flows through aftercooler (5) , the temperature of the compressed air is cooled to about 46 °C (115 °F). The aftercooler utilizes a heat exchanger in order to cool the inlet air. Cooling the inlet air causes the air to become more dense. Compressing and cooling the inlet air increases the combustion efficiency of the engine. This also increases the horsepower output.From the aftercooler, air enters the inlet manifold (3) . Air flow from the inlet manifold to the cylinders is controlled by inlet valves (1) . There are two inlet valves and two exhaust valves (2) for each cylinder. The inlet valves open at the top center position of the piston. When the inlet valves open, cooled compressed air enters the cylinder through the inlet ports. The inlet valves close as the piston reaches the bottom center position. This is called the inlet stroke of the engine. As the piston begins to travel back to the top center position on the compression stroke, the air in the cylinder is compressed to a high temperature. When the piston is near the end of the compression stroke, fuel is injected into the cylinder and mixes with the compressed air. This causes combustion to start in the cylinder. Once combustion starts, the combustion force pushes the piston toward the bottom center position. This is called the power stroke. The exhaust valves open when the piston moves toward the bottom center position and the exhaust gases are pushed through the exhaust port into exhaust manifold (4) as the piston travels toward top center on the exhaust stroke. The exhaust valves close and the cycle repeats. The complete cycle consists of four strokes:
Inlet
Compression
Power
ExhaustThe exhaust gases from the cylinder are forced into exhaust manifold (4) . The flow of exhaust gases from the exhaust manifold enter the turbine side
Caterpillar parts catalog:
Parts bracket Caterpillar catalog:
7C8366
BRACKET AS
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160H, 160H ES, 160H NA, 160K, 163H NA, 214B, 224B, 3114, 3116, 3126, 3126B, 3...
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160H, 160H ES, 160H NA, 160K, 163H NA, 214B, 224B, 3114, 3116, 3126, 3126B, 3...
9X9365
BRACKET
120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12H, 12H ES, 12H NA, 12K, 12M, 12M 3, 12M 3 AWD, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 3, 140M 3 AWD, 143H, 14H, 14H NA, 1...
120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12H, 12H ES, 12H NA, 12K, 12M, 12M 3, 12M 3 AWD, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 3, 140M 3 AWD, 143H, 14H, 14H NA, 1...
1546626
BRACKET AS
1090, 1190, 1190T, 120K, 1290T, 12M, 1390, 140K, 140K 2, 140M, 160K, 2290, 2390, 2391, 2491, 2590, 303.5D, 303E CR, 304D CR, 511, 521, 522, 532, 533, 541, 541 2, 543, 551, 552, 552 2, 621H, 621K, 623K...
1090, 1190, 1190T, 120K, 1290T, 12M, 1390, 140K, 140K 2, 140M, 160K, 2290, 2390, 2391, 2491, 2590, 303.5D, 303E CR, 304D CR, 511, 521, 522, 532, 533, 541, 541 2, 543, 551, 552, 552 2, 621H, 621K, 623K...
2G6695
BRACKET
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 2, 14...
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 120M, 120M 2, 12G, 12H, 12H ES, 12H NA, 12K, 12M, 12M 2, 12M 3, 12M 3 AWD, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 140M, 140M 2, 14...
1052080
BRACKET AS
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 12G, 12H, 12H ES, 12H NA, 12K, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160G, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
120G, 120H, 120H ES, 120H NA, 120K, 120K 2, 12G, 12H, 12H ES, 12H NA, 12K, 130G, 135H, 135H NA, 140G, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160G, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
8W1753
BRACKET-RAIL
120G, 120H, 120K, 120K 2, 12G, 12H, 130G, 135H, 140G, 140H, 140K, 160G, 160H, 160K
120G, 120H, 120K, 120K 2, 12G, 12H, 130G, 135H, 140G, 140H, 140K, 160G, 160H, 160K
8W1752
BRACKET-RAIL
120G, 120H, 120K, 120K 2, 12G, 12H, 130G, 135H, 140G, 140H, 140K, 160G, 160H, 160K
120G, 120H, 120K, 120K 2, 12G, 12H, 130G, 135H, 140G, 140H, 140K, 160G, 160H, 160K
1127462
BRACKET
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA
8X4879
BRACKET AS
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 16H, 16H NA
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 16H, 16H NA
1234587
BRACKET
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 16H, 16H NA, 24H, 2...
120H, 120H ES, 120H NA, 120K, 120K 2, 12H, 12H ES, 12H NA, 12K, 135H, 135H NA, 140H, 140H ES, 140H NA, 140K, 140K 2, 143H, 14H, 14H NA, 160H, 160H ES, 160H NA, 160K, 163H, 163H NA, 16H, 16H NA, 24H, 2...
2847774
BRACKET
120K, 120K 2, 12K, 140K, 140K 2, 160K
120K, 120K 2, 12K, 140K, 140K 2, 160K
3128529
BRACKET AS
120K, 120K 2, 12K, 140K, 140K 2, 160K
120K, 120K 2, 12K, 140K, 140K 2, 160K
3387446
BRACKET-RAIL
120K, 120K 2
120K, 120K 2
3076568
BRACKET AS
120K, 120K 2
120K, 120K 2
3490740
BRACKET AS
120K, 120K 2, 140K, 160K
120K, 120K 2, 140K, 160K
3263121
BRACKET AS
120K, 120K 2, 140K, 160K
120K, 120K 2, 140K, 160K
3164404
BRACKET AS
120K, 120K 2, 12K, 140K, 140K 2, 160K
120K, 120K 2, 12K, 140K, 140K 2, 160K
3914248
BRACKET AS
120K, 120K 2, 12K, 140K, 140K 2, 160K
120K, 120K 2, 12K, 140K, 140K 2, 160K
3254625
BRACKET
120M
120M
3270182
BRACKET AS
120M
120M
3295936
BRACKET
120M
120M
3348137
BRACKET AS
12K, 140K, 160K
12K, 140K, 160K
3348135
BRACKET AS
12K, 140K, 160K
12K, 140K, 160K
3396124
BRACKET AS
140K, 160K
140K, 160K