4910256 ROD AS Caterpillar parts
Rating:
Alternative (cross code) number:
CA4910256
491-0256
4910256
CA4910256
491-0256
4910256
Weight: 92 pounds 41 kg.
Information:
Some Setpoints for the former Software were at fixed pressures.
Note: Revision 5 will calculate the engine setpoints by using the engine RPM. The alarm setpoint and the shutdown setpoint will now be calculated by the software package.The actual setpoints can be determined by using the formulas in Table 2 and Table 3 that follow:Changes to the Alarm Setpoints and the Shutdown Setpoints were made.
Table 1
Changes that were made to Alarm Setpoints    
Parameter     Type of Change     Former Value     Current Value    
"Turbo Speed High Alarm"     The alarm setpoint has decreased.     35,000 RPM     32,000 RPM    
"Fuel Temperature High Alarm"     The alarm setpoint has increased.     (50 °C)(122 °F)     (66 °C)(151 °F)    
"AC/OC Water Temperature High Alarm"     The alarm setpoint has decreased. (1)    
60 °C (140 °F)    
39 °C (102 °F)    
"Inlet to Turbo Exhaust Temperature High Alarm"     The alarm setpoint has increased. (2)    
630 °C (1166 °F)    
650 °C (1202 °F)    
( 1 ) Only engines with 32 °C (90 °F) water temperature regulators in the aftercooler circuit are affected by this change.
( 2 ) This affects only High Output Engines.
Table 2
Calculate the Alarm Setpoints by using this Method.    
Name of the Alarm Setpoint         Conversion Factor    
"AC/OC Water Pressure Low"     Multiply the Engine RPM.     by
0.07 kPa (0.01 psi)    
"Jacket Water Pressure Low"     Multiply the Engine RPM.     by
0.07 kPa (0.01 psi)    
"Raw Water Pressure Low"     Multiply the Engine RPM.     by
0.07 kPa (0.01 psi)    
Table 3
Calculate the Shutdown Setpoints by using this Method.    
Name of the Shutdown Setpoint         Conversion Factor    
"Engine Oil Pressure Low"     Multiply the Engine RPM.     by
0.4 kPa (0.058 psi)    
"Jacket Water Pressure Low"     Multiply the Engine RPM.     by
0.05 kPa (0.007 psi)    Engine Configuration Additions
The protection system for the engine can be configured for either of two different temperature ranges. The two temperature ranges that are available are listed below.
32 °C (90 °F)
50 °C (122 °F)This will change the "AC/OC Water Temperature High" alarm setpoint.The protection system can be configured for either the standard or the high output engines. This will change the "Inlet to Turbo Exhaust Temperature High" alarm setpoint.The "Auxillary Alarm (Input # 2)" can be configured to activate an "Oil Contamination in the Water System" alarm. The customer must install an oil contamination sensor into the water system in order to have the alarm function.The "#1 Programmable Speed Relay" can be configured in order to control the "Turbo By-Pass Solenoid" when a turbocharger is mounted on the front of the engine.New Alarms have been Added
"Inlet Air Manifold Temperature Low Alarm" - The alarm setpoint is 15 °C (59 °F)."Jacket Water Outlet / Oil Inlet Temperature Differential Low Alarm" - The alarm setpoint is 2 °C (3.6 °F)."Oil Contamination in the Water System Alarm" - The alarm is connected from a switched input to
Note: Revision 5 will calculate the engine setpoints by using the engine RPM. The alarm setpoint and the shutdown setpoint will now be calculated by the software package.The actual setpoints can be determined by using the formulas in Table 2 and Table 3 that follow:Changes to the Alarm Setpoints and the Shutdown Setpoints were made.
Table 1
Changes that were made to Alarm Setpoints    
Parameter     Type of Change     Former Value     Current Value    
"Turbo Speed High Alarm"     The alarm setpoint has decreased.     35,000 RPM     32,000 RPM    
"Fuel Temperature High Alarm"     The alarm setpoint has increased.     (50 °C)(122 °F)     (66 °C)(151 °F)    
"AC/OC Water Temperature High Alarm"     The alarm setpoint has decreased. (1)    
60 °C (140 °F)    
39 °C (102 °F)    
"Inlet to Turbo Exhaust Temperature High Alarm"     The alarm setpoint has increased. (2)    
630 °C (1166 °F)    
650 °C (1202 °F)    
( 1 ) Only engines with 32 °C (90 °F) water temperature regulators in the aftercooler circuit are affected by this change.
( 2 ) This affects only High Output Engines.
Table 2
Calculate the Alarm Setpoints by using this Method.    
Name of the Alarm Setpoint         Conversion Factor    
"AC/OC Water Pressure Low"     Multiply the Engine RPM.     by
0.07 kPa (0.01 psi)    
"Jacket Water Pressure Low"     Multiply the Engine RPM.     by
0.07 kPa (0.01 psi)    
"Raw Water Pressure Low"     Multiply the Engine RPM.     by
0.07 kPa (0.01 psi)    
Table 3
Calculate the Shutdown Setpoints by using this Method.    
Name of the Shutdown Setpoint         Conversion Factor    
"Engine Oil Pressure Low"     Multiply the Engine RPM.     by
0.4 kPa (0.058 psi)    
"Jacket Water Pressure Low"     Multiply the Engine RPM.     by
0.05 kPa (0.007 psi)    Engine Configuration Additions
The protection system for the engine can be configured for either of two different temperature ranges. The two temperature ranges that are available are listed below.
32 °C (90 °F)
50 °C (122 °F)This will change the "AC/OC Water Temperature High" alarm setpoint.The protection system can be configured for either the standard or the high output engines. This will change the "Inlet to Turbo Exhaust Temperature High" alarm setpoint.The "Auxillary Alarm (Input # 2)" can be configured to activate an "Oil Contamination in the Water System" alarm. The customer must install an oil contamination sensor into the water system in order to have the alarm function.The "#1 Programmable Speed Relay" can be configured in order to control the "Turbo By-Pass Solenoid" when a turbocharger is mounted on the front of the engine.New Alarms have been Added
"Inlet Air Manifold Temperature Low Alarm" - The alarm setpoint is 15 °C (59 °F)."Jacket Water Outlet / Oil Inlet Temperature Differential Low Alarm" - The alarm setpoint is 2 °C (3.6 °F)."Oil Contamination in the Water System Alarm" - The alarm is connected from a switched input to
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