10R8004 CROWN AS-PISTON Caterpillar parts
578, 980C, D8N
Rating:
Alternative (cross code) number:
CA10R8004
10R-8004
10R8004
CA10R8004
10R-8004
10R8004
PIPELAYER, WHEEL LOADER,
Compatible equipment models: 10R8004:
Information:
Illustration 1 g01776416
(1) Throttle actuator
(2) Compressor bypass actuator
(3) Fuel metering valve The ECM responds to the input from the power sensor or from engine speed by energizing compressor bypass actuator (2). This causes the compressor bypass actuator to open.The compressor bypass actuator is connected before throttle actuator (1). Tubing is connected from the compressor bypass actuator to the inlet for the turbocharger compressor: one set of tubing is connected to the inlet for the right turbocharger and the other set of tubing is connected to the inlet for the left turbocharger. When the compressor bypass actuator is opened, some of the compressed air/fuel mixture is diverted through the tubing away from the throttle. This reduces the back pressure that is caused by excessive pressure in the air inlet system.Additionally, the ECM sends two command signals. A command to throttle actuator (1) opens the throttle in order to reduce the resistance that contributes to back pressure. A command to the fuel metering valve (3) reduces the fuel supply in order to reduce the engine speed and the turbocharger's speed.The combined effect of these actions reduces the opportunity for a turbocharger surge.The ECM determines a time period that is required for opening of the compressor bypass actuator. After the time period has expired, the ECM de-energizes the compressor bypass actuator and the valve closes. Normal operation resumes.The compressor bypass group is also operated during engine shutdown. The compressor bypass actuator is activated when the output for the fuel control relay is OFF and the engine rpm is greater than 100. The ECM activates the output for the compressor bypass actuator until the engine rpm is reduced to zero. This reduces the opportunity for a turbocharger surge during engine shutdown. Additionally, any air/fuel mixture that may have been trapped in the tubing is purged.
Caterpillar parts catalog:
Parts crown Caterpillar catalog:
1684540
CROWN AS-PISTON
578, 583R, 824C, 824G, 825G, 826C, 826G, 980C, 980G, D8N, D8R, D8R II
578, 583R, 824C, 824G, 825G, 826C, 826G, 980C, 980G, D8N, D8R, D8R II
1684540
CROWN AS-PISTON
578, 583R, 824C, 824G, 825G, 826C, 826G, 980C, 980G, D8N, D8R, D8R II
578, 583R, 824C, 824G, 825G, 826C, 826G, 980C, 980G, D8N, D8R, D8R II
3295398
CROWN
D6M, D6N
D6M, D6N
9T6302
CROWN
926, 936, 936F, D6M, D6N, G936
926, 936, 936F, D6M, D6N, G936
8J5550
CROWN
508, 561C, 561D, 639D, 814B, 814F, 814F II, 825C, 931, 931B, 963, 963B, 963C, 963D, D4HTSK III
508, 561C, 561D, 639D, 814B, 814F, 814F II, 825C, 931, 931B, 963, 963B, 963C, 963D, D4HTSK III
3G2789
CROWN
611, 615, 615C, 963B, 963C
611, 615, 615C, 963B, 963C
8J5911
CROWN
120G, 12G, 130G, 140G, 14G, 16G, 227, 508, 518, 518C, 627E, 637E, 657E, 910, 916, 926, 931B, 950, D3C III, D3G, D4C III, D4G, D5C III, D5G, IT18B, IT28, IT28B
120G, 12G, 130G, 140G, 14G, 16G, 227, 508, 518, 518C, 627E, 637E, 657E, 910, 916, 926, 931B, 950, D3C III, D3G, D4C III, D4G, D5C III, D5G, IT18B, IT28, IT28B
9T6293
CROWN
613C, 613C II, FB518
613C, 613C II, FB518
4T8711
CROWN
824G, 824G II, 824H, D7H
824G, 824G II, 824H, D7H
8J6377
CROWN
12G, 130G, 160G, 508, 910, 931B, IT12
12G, 130G, 160G, 508, 910, 931B, IT12
8J5964
CROWN
613C, 953
613C, 953
9J0486
CROWN
931B
931B
7J7984
CROWN
10, 8D, D10, D11N, D3B, D5B, D6D
10, 8D, D10, D11N, D3B, D5B, D6D