2008/05/12 Caterpillar

Engine:

G3508 (S/N: WPN1500-UP)

G3512 (S/N: WPP1500-UP; WPR1500-UP)

G3516 (S/N: WPT1500-UP; WPW1500-UP)

Description of Change: The new software provides the following features:

• The ability for the ECM to monitor exhaust temperatures via an external exhaust temperature module

• Programmable warnings and shutdowns for the exhaust temperatures

• Improved stability during no load operation

• A change in timing during no load operation

Adaptable To: Load based timing was removed from the engine software in the following part numbers:

• 319-6463 Engine Ratings Electronic Software Gp

• 317-5319 Engine Ratings Electronic Software Gp

• 317-5317 Engine Ratings Electronic Software Gp

In order to support this change, the Advisor software was updated from 317-0579 Monitor Software Gp to 322-0817 Monitor Software Gp .

The new software is adaptable to the above engines with NO_x feedback that are in petroleum applications. Additionally, the software for the Advisor interface has been updated. The software is for use with Caterpillar Electronic Technician (ET) beginning with version 2007C.

The new software enables the engine Electronic Control Module (ECM) and the Advisor to receive data about the engine's exhaust temperatures. The temperatures are monitored with thermocouples that are connected to an exhaust temperature module. The module broadcasts the data to the ECM and to the Advisor via a CAN data link.

Note: For information on the exhaust temperature module, refer to Systems Operation/Testing and Adjusting, KENR5473, "Exhaust Temperature Module".To enable the ECM to accept information from the exhaust temperature module, a parameter has been added to the software. The "Exhaust Temperature Installation Status" must be set to "Installed" in order for the ECM to detect input from the exhaust temperature module. If the parameter is set to "Uninstalled", the ECM will not attempt to receive information from the exhaust temperature module.

The new software enables the ECM to interpret the temperatures of the cylinder exhaust ports and of the turbine inlet. The ECM is able to transmit the values to Cat ET via the Cat Data Link. The monitoring system can be programmed to set levels for warnings and for shutdowns due to high exhaust temperatures. Refer to Tables 1 and 2.

Table 1

Monitoring of Exhaust Temperatures for the G3508 A3 Engines
Description	State		Trip Point		Delay Time
	Modes	Default	Range	Default	Range	Default
Turbocharger Inlet Temperature
Warning	On/Off	On	100 to 710 °C (212 to 1319 °F)	710 °C (1310 °F)	1 to 60 sec	20 secs
Shutdown	Always On		100 to 720 °C (212 to 1328 °F)	720 °C (1328 °F)	0 secs
Exhaust Port Temperature
Warning	On/Off	Off	100 to 710 °C (212 to 1319 °F)	710 °C (1310 °F)	1 to 60 secs	20 secs
Shutdown	On/Off	Off	100 to 720 °C (212 to 1328 °F)	720 °C (1328 °F)	0 to 60 secs	0 secs

Table 2

Monitoring of Exhaust Temperatures for the G3512 A3 and G3516 A3 Engines
Description	State		Trip Point		Delay Time
	Modes	Default	Range	Default	Range	Default
Turbocharger Inlet Temperature
Warning	On/Off	Off	100 to 690 °C (212 to 1319 °F)	690 °C (1274 °F)	1 to 60 secs	20 secs
Shutdown	On/Off	Off	100 to 700 °C (212 to 1292 °F)	700 °C (1292 °F)	0 to 60 secs	0 secs
Exhaust Port Temperature
Warning	On/Off	Off	100 to 690°C (212 to 1274 °F)	690°C (1274 °F)	1 to 60 secs	20 secs
Shutdown	On/Off	Off	100 to 700 °C (212 to 1292 °F)	700 °C (1292 °F)	0 to 60 secs	0 secs

In addition to monitoring of exhaust temperatures, the strategy for governing the engine speed at no load has been changed in order to improve stability. Also, the timing of 14 degrees before top center during no load operation has been removed in order to avoid high exhaust temperatures if the engine is run for an extended period of time at no load.

Desired base timing is set at 18 degrees before top center until the engine speed reaches the crank terminate speed. During the time the engine speed is above the crank terminate speed, the desired timing gradually changes toward the desired base timing. The desired base timing is programmed with the service tool.

The new software is listed in Table 3.

Table 3

Engine	Engine Software		Advisor Software
	Old	New	Old	New
G3508 A3	308-4771	319-6463	317-0579	322-0817
G3512 A3	308-4538	317-5319
G3516 A3	308-4416	317-5317

The new software is adaptable to the engines that are listed above. Serial number effectivity is listed in Table 4.

Table 4

Serial Number Effectivity
Model	Serial Number
G3508 (1200 RPM)	S/N:WPN01575-UP
G3512 (1200 RPM)	S/N:WPP01544-UP
G3512 (1400 RPM)	S/N:WPR01540-UP
G3516 (1200 RPM)	S/N:WPT01544-UP
G3516 (1400 RPM)	S/N:WPW02174-UP