G3500H Generator Set Engine Caterpillar


Engine Monitoring System

Usage:

G3512H GF4
The Electronic Control Module (ECM) monitors the operating parameters of the engine. The ECM can initiate responses if a specific engine parameter exceeds an acceptable range.

Refer to table 1 for the available responses for this engine.

Table 1
Cross-reference for System Response to an Event Warning Category Indicators (1) and (3) 
Warning Category Indicator  System Response Shown on Cat ET  Description of the System Response 
(1)  "Least Severe"  Warning 
(2)  "Moderate Severe"  Impending Shutdown 
(3)  "Most Severe"  Shutdown 

Note: All severity levels may not be supported for a monitored parameters.

Use the Caterpillar Electronic Technician (ET) to perform the following activities:

  • Select the available responses.

  • Program the level for monitoring.

  • Program delay times for each response.

The default settings for the parameters are programmed at the factory. To accommodate unique applications and sites, the parameters may be reprogrammed with Cat ET. The screens of Cat ET provide guidance for the changing of trip points.

Note: Some of the parameters are protected by factory passwords. Other parameters can be changed with customer passwords.

Changing the Settings of the Monitoring System

Use the following procedure to change settings of the parameters:

  1. Use Cat ET and select the "Monitoring System" screen.

  2. Highlight the desired parameter. Then click the "Change" button in the lower left corner of the screen.

    The "Change Monitor System" screen will appear.

  3. Change the "State" to "On" or "Off".

  4. Set the "Trip Point" and the "Delay Time" according to the "Allowed Values" in the lower half of the screen.

  5. Click the "OK" button.

    If a password is required, the "Enter Passwords" screen will appear. Enter the correct passwords and then click the "OK" button.

    The new settings will be effective immediately.

    Note: Factory passwords are only available to service technicians from an authorized Caterpillar Dealership. Customers of Caterpillar do not have access to the Caterpillar Factory Password System (FPS).

Default Settings of the Monitoring System

The default settings for the parameters are programmed at the factory. To accommodate unique applications and sites, the parameters may be reprogrammed with Cat ET. The screens of Cat ET provide guidance for changing trip points.

Separate timers are used in the ECM for each response that is associated with a parameter. If a trip point is exceeded, the timer for that event is started.

For example, the warning for "High Engine Coolant Temperature" can be set to 95° C with a five second delay. The timer starts counting if the coolant temperature exceeds 95° C. If the temperature is not reduced to less than 95° C within five seconds, the event becomes active and the event is logged.

Conditions for Parameters

Some of the programmable parameters depend on the status of an ECM output before the parameters are allowed to function. Some of the parameters are allowed to function after the crank terminate relay has been energized for more than 30 seconds. Other parameters are allowed to function after the output for the fuel control relay is energized. Some parameters are not dependent upon any conditions.

The conditions are designed to eliminate false events during start-up if the customer has programmed a delay time to zero.

Use care when you program the trip points and the delay times. Ensure that the response of the ECM is correct for the application. The monitoring system will accept any settings within the ranges.

If the trip point for a shutdown is programmed to activate before the trip point for a warning, the engine will shutdown and the warning will not be activated.

Table 2
Programmable Monitoring System Settings for the G3516H and G3520H 
Parameter
Description 
Event Code  System Response  Default State  Default Trip Point  Default Delay in Seconds  Security Level
Password 
Range of the Trip Point  Range of the Delay in Seconds 
"High Engine Coolant Temperature"  110-15
Engine Coolant Temperature : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
106°C  20  80°C
to
115°C 
1 to 60 
"High Engine Coolant Temperature"  110-16
Engine Coolant Temperature : High - moderate severity (2) 
Moderate severity (2)
Warning 
Off  111°C  20  80°C
to
129°C 
1 to 60 
"High Engine Coolant Temperature"  110-0
Engine Coolant Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
113°C  20  80°C
to
115°C 
1 to 10 
"Low Engine Coolant Temperature"  110-17
Engine Coolant Temperature : Low - least severe (1) 
Least Severe (1)
Warning 
On  5°C  20  5°C
to
80°C 
1 to 60 
"High Eng Oil to Eng Coolant Differential Temp"  4243-15
Engine Oil to Engine Coolant Differential Temperature : High - Least Severe (1) 
Least Severe (1)
Warning 
Always
On 
12°C  20  13°C
to
15°C 
1 to 60 
"High Eng Oil to Eng Coolant Differential Temp"  4243-0
Engine Oil to Engine Coolant Differential Temperature : High - Most Severe (3) 
Most Severe (3)
Shutdown 
Always
On 
15°C  20  15°C
to
15°C 
1 to 60 
"High Engine Oil Temperature"  175-15
Engine Oil Temperature 1 : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
105°C  20  85°C
to
115°C 
1 to 60 
"High Engine Oil Temperature"  175-16
Engine Oil Temperature 1 : High - moderate severity (2) 
Moderate severity (2)
Warning 
Off  160°C  60  85°C
to
115°C 
1 to 60 
"High Engine Oil Temperature"  175-0
Engine Oil Temperature 1 : High - most severe (3) 
Most Severe (3)
Shutdown 
On  113°C  20  85°C
to
115°C 
1 to 60 
"Low Engine Oil Pressure"  100-17
Engine Oil Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
MAP  MAP  1 to 60 
"Low Engine Oil Pressure"  100-1
Engine Oil Pressure : Low - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
MAP  MAP  1 to 60 
"High Oil Filter Differential Pressure"  99-15
Engine Oil Filter Differential Pressure : High - least severe (1) 
Least Severe (1)
Warning 
On  220 kPa  20  120 kPa
to
180 kPa 
1 to 60 
"High Oil Filter Differential Pressure"  99-0
Engine Oil Filter Differential Pressure : High - most severe (3) 
Most Severe (3)
Shutdown 
On  240 kPa  10  120 kPa
to
180 kPa 
1 to 60 
"Low Oil Filter Differential Pressure"  99-17
Engine Oil Filter Differential Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
On  5 kPa  60  20 kPa
to
70 kPa 
1 to 60 
"Low Oil Filter Differential Pressure"  99-1
Engine Oil Filter Differential Pressure : Low - most severe (3) 
Most Severe (3)
Shutdown 
Off  0 kPa  10  20 kPa
to
70 kPa 
1 to 60 
"High Gas Fuel Differential Pressure"  1391-15
Engine Fuel Valve Differential Pressure : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
35 kPa  10  20 kPa
to
35 kPa 
1 to 60 
"Low Gas Fuel Differential Pressure"  1391-17
Engine Fuel Valve Differential Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
10.5kPa  10  5 kPa
to
35 kPa 
1 to 60 
"High Gas Fuel Pressure"  1390-15
Engine Fuel Valve #1 Inlet Absolute Pressure : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
135 kPa  10  100 kPa
to
145 kPa 
1 to 60 
"Low Gas Fuel Pressure"  1390-17
Engine Fuel Valve #1 Inlet Absolute Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
105 kPa  10  85 kPa
to
135 kPa 
1 to 60 
"High Fuel Temperature"  174-15
Engine Fuel Temperature 1 : High - least severe (1) 
Least Severe (1)
Warning 
On  60°C  20  0°C
to
60°C 
1 to 60 
"High Intake Manifold Air Temperature"  105-15
Engine Intake Manifold #1 Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  58°C  20  32°C
to
66°C 
1 to 60 
"High Intake Manifold Air Temperature"  105-16
Engine Intake Manifold #1 Temperature : High - moderate severity (2) 
Moderate Severe (2)
Delayed Shutdown 
Off  66°C  20  32°C
to
68°C 
1 to 60 
"High Intake Manifold Air Temperature"  105-0
Engine Intake Manifold #1 Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  66°C  20  32°C
to
68°C 
1 to 60 
"High Air Inlet #1 Differential Pressure"  107-15
Engine Air Filter 1 Differential Pressure : High - least severe (1) 
Least Severe (1)
Warning 
On  2.5 kPa  0 kPa
to
3.5 kPa 
1 to 10 
"Engine Overspeed"  190-15
Engine Speed : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
1875 rpm  1500 rpm
to
1875 rpm 
0 to 5 
"Engine Overspeed"  190-0
Engine Speed : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
1875 rpm  1500 rpm
to
1875 rpm 
0 to 0 
"Low System Voltage"  168-17
Battery Potential / Power Input #1 : Low - least severe (1) 
Least Severe (1)
Warning 
On  20 VDC  20  18 VDC
to
24 VDC 
1 to 60 
"Low System Voltage"  168-1
Battery Potential / Power Input #1 : Low - most severe (3) 
Most Severe (3)
Shutdown 
On  18 VDC  10  18 VDC
to
24 VDC 
1 to 60 
"High System Voltage"  168-0
Battery Potential / Power Input #1 : High - most severe (3) 
Least Severe (1)
Warning 
On  34 VDC  20  30 VDC
to
36 VDC 
1 to 60 

Table 3
Programmable Monitoring System Settings for the G3512H 
Parameter
Description 
Event Code  System Response  Default State  Default Trip Point  Default Delay in Seconds  Security Level
Password 
Range of the Trip Point  Range of the Delay in Seconds 
"High Engine Coolant Temperature"  110-15
Engine Coolant Temperature : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
106°C  20  80°C
to
129°C 
1 to 60 
"High Engine Coolant Temperature"  110-0
Engine Coolant Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
113°C  20  80°C
to
129°C 
1 to 10 
"Low Engine Coolant Temperature"  110-17
Engine Coolant Temperature : Low - least severe (1) 
Least Severe (1)
Warning 
On  5°C  20  60°C
to
85°C 
1 to 60 
"Low Engine Coolant Pressure"  109-1
Engine Coolant Pressure : Low - most severe (3) 
Most Severe (3)
Shutdown 
Off  MAP  10  MAP  1 to 60 
"High Eng Oil to Eng Coolant Differential Temp"  4243-15
Engine Oil to Engine Coolant Differential Temperature : High - Least Severe (1) 
Least Severe (1)
Warning 
Always
On 
13°C  20  13°C
to
15°C 
1 to 60 
"High Eng Oil to Eng Coolant Differential Temp"  4243-0
Engine Oil to Engine Coolant Differential Temperature : High - Most Severe (3) 
Most Severe (3)
Shutdown 
Always
On 
15°C  20  15°C
to
15°C 
1 to 60 
"High Engine Oil Temperature"  175-15
Engine Oil Temperature 1 : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
102°C  20  85°C
to
115°C 
1 to 60 
"High Engine Oil Temperature"  175-0
Engine Oil Temperature 1 : High - most severe (3) 
Most Severe (3)
Shutdown 
On  104°C  20  85°C
to
115°C 
1 to 60 
"Low Engine Oil Pressure"  100-17
Engine Oil Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
MAP  MAP  1 to 15 
"Low Engine Oil Pressure"  100-1
Engine Oil Pressure : Low - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
MAP  MAP  0 to 0 
"High Oil Filter Differential Pressure"  99-15
Engine Oil Filter Differential Pressure : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
160 kPa  20  120 kPa
to
180 kPa 
1 to 60 
"High Oil Filter Differential Pressure"  99-0
Engine Oil Filter Differential Pressure : High - most severe (3) 
Most Severe (3)
Shutdown 
On  180 kPa  10  120 kPa
to
180 kPa 
1 to 60 
"Low Oil Filter Differential Pressure"  99-17
Engine Oil Filter Differential Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
40 kPa  60  20 kPa
to
70 kPa 
1 to 60 
"Low Oil Filter Differential Pressure"  99-1
Engine Oil Filter Differential Pressure : Low - most severe (3) 
Most Severe (3)
Shutdown 
On  20 kPa  10  20 kPa
to
70 kPa 
1 to 60 
"High Gas Fuel Differential Pressure"  1391-15
Engine Fuel Valve Differential Pressure : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
35 kPa  10  20 kPa
to
35 kPa 
1 to 60 
"Low Gas Fuel Differential Pressure"  1391-17
Engine Fuel Valve Differential Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
7 kPa  5 kPa
to
35 kPa 
1 to 60 
"High Gas Fuel Pressure"  1390-15
Engine Fuel Valve #1 Inlet Absolute Pressure : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
135 kPa  10  100 kPa
to
135 kPa 
1 to 60 
"Low Gas Fuel Pressure"  1390-17
Engine Fuel Valve #1 Inlet Absolute Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
110 kPa  10  68 kPa
to
110 kPa 
1 to 60 
"High Fuel Temperature"  174-15
Engine Fuel Temperature 1 : High - least severe (1) 
Least Severe (1)
Warning 
On  60°C  20  0°C
to
60°C 
1 to 60 
"High Intake Manifold Air Temperature"  105-15
Engine Intake Manifold #1 Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  58°C  20  32°C
to
66°C 
1 to 60 
"High Intake Manifold Air Temperature"  105-0
Engine Intake Manifold #1 Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  66°C  20  32°C
to
68°C 
1 to 60 
"High Air Inlet #1 Differential Pressure"  107-15
Engine Air Filter 1 Differential Pressure : High - least severe (1) 
Least Severe (1)
Warning 
On  2.5 kPa  0 kPa
to
5 kPa 
1 to 10 
"High Crankcase Pressure"  101-15
Engine Crankcase Pressure : High - least severe (1) 
Least Severe (1)
Warning 
On  2 kPa  2 kPa
to
2 kPa 
1 to 10 
"High Crankcase Pressure"  101-0
Engine Crankcase Pressure : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
3 kPa  3 kPa
to
3 kPa 
3 to 3 
"Low Crankcase Pressure"  101-17
Engine Crankcase Pressure : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
-2 kPa  -2 kPa
to
-2 kPa 
1 to 10 
"Engine Overspeed"  190-15
Engine Speed : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
1700 rpm  1500 rpm
to
1875 rpm 
0 to 5 
"Engine Overspeed"  190-0
Engine Speed : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
1875 rpm  1500 rpm
to
1875 rpm 
0 to 0 
"Low System Voltage"  168-17
Battery Potential / Power Input #1 : Low - least severe (1) 
Least Severe (1)
Warning 
On  20 VDC  20  18 VDC
to
24 VDC 
1 to 60 
"Low System Voltage"  168-1
Battery Potential / Power Input #1 : Low - most severe (3) 
Most Severe (3)
Shutdown 
On  18 VDC  10  18 VDC
to
24 VDC 
1 to 60 
"High System Voltage"  168-0
Battery Potential / Power Input #1 : High - most severe (3) 
Least Severe (1)
Warning 
On  34 VDC  20  30 VDC
to
36 VDC 
1 to 60 

Programmable Parameters of the Integrated Sensing Module

The Integrated Temperature Sensing Module (ISM) monitors the temperatures of the cylinder exhaust ports and of the inlets of the turbocharger turbine.

If a temperature exceeds an acceptable range, the ISM can initiate a "WARNING" or "SHUTDOWN". Both of the responses are available for all the parameters. Use Cat ET to perform the following activities:

  • Select the available responses.

  • Program the level for monitoring.

  • Program delay times for each response.

Note: To initiate the responses, the ISM sends commands to the ECM via the CAN Data Link. If the connection between the ISM and the ECM is not correct, the ISM cannot initiate any response.

The default settings for the parameters are programmed at the factory. To accommodate unique applications and sites, the parameters may be reprogrammed with Cat ET. The screens of Cat ET provide guidance for changing trip points.

Use Cat ET to determine the programming for your engine. The items can be reprogrammed to accommodate the requirements of individual sites.

Use care when you program the trip points and the delay times. Ensure that the response of the ISM is correct for the application. The monitoring system will accept any setting within the ranges.

If the trip point for a shutdown is lower than the trip point for a warning, the warning will not be activated.

Separate timers are used in the ISM for each response that is associated with a parameter. If a trip point is exceeded, the timer for that event is started.

For example, the warning for the "High Exhaust Temperature" can be set to 655 °C with a 30 second delay. The timer starts counting if the exhaust port temperature of the cylinder reaches 655 °C. If the temperature is not reduced to less than 655 °C within 30 seconds, the event becomes active and the event is logged.

Table 4
(Integrated Sensing Module) Programmable Monitoring System Settings for the G3516H amd G3520H 
Parameter  Event Code  System Response  Default State  Default Trip Point  Default Delay in Seconds  Security Level
Password 
Range of the Trip Point  Range of the Delay in Seconds 
"High Turbo Turbine Outlet Temperature"  1184-15
Engine Turbocharger #1 Turbine Outlet Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  660°C  300°C
to
700°C 
1 to 10 
"High Turbo Turbine Outlet Temperature"  1184-0
Engine Turbocharger #1 Turbine Outlet Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  710°C  30  500°C
to
710°C 
1 to 60 
"High Turbo Turbine Outlet Temperature"  1185-15
Engine Turbocharger #2 Turbine Outlet Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  660°C  300°C
to
700°C 
1 to 10 
"High Turbo Turbine Outlet Temperature"  1185-0
Engine Turbocharger #2 Turbine Outlet Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  710°C  30  500°C
to
710°C 
1 to 60 
"High Turbo Turbine Inlet Temperature"  1180-15
Engine Turbocharger #1 Turbine Intake Temperature : High - least severe (1)
And
1181-15
Engine Turbocharger #2 Turbine Intake Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  660°C  10  400°C
to
680°C 
1 to 10 
"High Turbo Turbine Inlet Temperature"  1180-0
Engine Turbocharger #1 Turbine Intake Temperature : High - most severe (3)
And
1181-0
Engine Turbocharger #2 Turbine Intake Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
680°C  10  500°C
to
710°C 
1 to 60 
"Exhaust Port Temperature - Too High"  1137-15
Engine Exhaust Gas Port 1 Temperature : High - least severe (1)
Through
1156-15
Engine Exhaust Gas Port 20 Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  650°C  400°C
to
700°C 
1 to 60 
"Exhaust Port Temperature - Too High"  1137-0
Engine Exhaust Gas Port 1 Temperature : High - most severe (3)
Through
1156-0
Engine Exhaust Gas Port 20 Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  700°C  600°C
to
700°C 
1 to 60 
"Exhaust Port Temperature High Deviation"  5686-15
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - least severe (1)
Through
5705-15
Engine Exhaust Gas Port #20 Difference from Average Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  50°C  10°C
to
100°C 
1 to 10 
"Exhaust Port Temperature High Deviation"  5686-0
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - most severe (3)
Through
5705-0
Engine Exhaust Gas Port #20 Difference from Average Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
100°C  5°C
to
125°C 
1 to 10 
"Exhaust Port Temperature Low Deviation"  5686-17
Engine Exhaust Gas Port #1 Difference from Average Temperature : Low - least severe (1)
Through
5705-17
Engine Exhaust Gas Port #20 Difference from Average Temperature : Low - least severe (1) 
Least Severe (1)
Warning 
On  50°C  10°C
to
100°C 
1 to 60 
"Exhaust Port Temperature Low Deviation"  5686-1
Engine Exhaust Gas Port #1 Difference from Average Temperature : Low - most severe (3)
Through
5705-1
Engine Exhaust Gas Port #20 Difference from Average Temperature : Low - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
100°C  50°C
to
350°C 
1 to 10 

Table 5
(Integrated Sensing Module) Programmable Monitoring System Settings for the G3512H 
Parameter  Event Code  System Response  Default State  Default Trip Point  Default Delay in Seconds  Security Level
Password 
Range of the Trip Point  Range of the Delay in Seconds 
"High Turbo Turbine Outlet Temperature"  1184-15
Engine Turbocharger #1 Turbine Outlet Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  550°C  10  350°C
to
800°C 
1 to 60 
"High Turbo Turbine Outlet Temperature"  1184-0
Engine Turbocharger #1 Turbine Outlet Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  600°C  10  350°C
to
800°C 
1 to 60 
"High Turbo Turbine Outlet Temperature"  1185-15
Engine Turbocharger #2 Turbine Outlet Temperature : High - least severe (1) 
Least Severe (1)
Warning 
On  550°C  10  350°C
to
800°C 
1 to 60 
"High Turbo Turbine Outlet Temperature"  1185-0
Engine Turbocharger #2 Turbine Outlet Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  600°C  10  350°C
to
800°C 
1 to 60 
"High Turbo Turbine Inlet Temperature"  1180-15
Engine Turbocharger #1 Turbine Intake Temperature : High - least severe (1)
And
1181-15
Engine Turbocharger #2 Turbine Intake Temperature : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
650°C  10  400°C
to
720°C 
1 to 60 
"High Turbo Turbine Inlet Temperature"  1180-0
Engine Turbocharger #1 Turbine Intake Temperature : High - most severe (3)
And
1181-0
Engine Turbocharger #2 Turbine Intake Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
Always
On 
680°C  10  500°C
to
750°C 
1 to 60 
"Exhaust Port Temperature - Too High"  1137-15
Engine Exhaust Gas Port 1 Temperature : High - least severe (1)
Through
1156-15
Engine Exhaust Gas Port 20 Temperature : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
660°C  400°C
to
700°C 
1 to 60 
"Exhaust Port Temperature - Too High"  1137-0
Engine Exhaust Gas Port 1 Temperature : High - most severe (3)
Through
1156-0
Engine Exhaust Gas Port 20 Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  680°C  600°C
to
710°C 
1 to 60 
"Exhaust Port Temperature High Deviation"  5686-15
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - least severe (1)
Through
5705-15
Engine Exhaust Gas Port #20 Difference from Average Temperature : High - least severe (1) 
Least Severe (1)
Warning 
Always
On 
25°C  10  10°C
to
50°C 
1 to 60 
"Exhaust Port Temperature High Deviation"  5686-0
Engine Exhaust Gas Port #1 Difference from Average Temperature : High - most severe (3)
Through
5705-0
Engine Exhaust Gas Port #20 Difference from Average Temperature : High - most severe (3) 
Most Severe (3)
Shutdown 
On  35°C  10  10°C
to
50°C 
1 to 60 
"Exhaust Port Temperature Low Deviation"  5686-17
Engine Exhaust Gas Port #1 Difference from Average Temperature : Low - least severe (1)
Through
5705-17
Engine Exhaust Gas Port #20 Difference from Average Temperature : Low - least severe (1) 
Least Severe (1)
Warning 
Always
On 
30°C  10°C
to
100°C 
1 to 60 
"Exhaust Port Temperature Low Deviation"  5686-1
Engine Exhaust Gas Port #1 Difference from Average Temperature : Low - most severe (3)
Through
5705-1
Engine Exhaust Gas Port #20 Difference from Average Temperature : Low - most severe (3) 
Most Severe (3)
Shutdown 
On  60°C  20  10°C
to
100°C 
1 to 60 

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Improved Venturi Tubes Are Now Used on Certain C27 and C32 Commercial Engines {1071} Improved Venturi Tubes Are Now Used on Certain C27 and C32 Commercial Engines {1071}
New Cylinder Head Available for 3512E Petroleum Well Service Engines {1100, 7555} New Cylinder Head Available for 3512E Petroleum Well Service Engines {1100, 7555}
SCR Retrofit Aftertreatment Fluid Recommendations
SCR Retrofit Aftertreatment Catalyst (DOC) - Clean/Inspect
SCR Retrofit Aftertreatment Catalyst (DOC) - Replace
SCR Retrofit Aftertreatment Catalyst (SCR) - Clean/Inspect
3512B Generator Set Engines with Dynamic Gas Blending Event Codes
Marine Selective Catalytic Reduction (SCR) Retrofit Aftertreatment Diesel Exhaust Fluid Pump - Replace
A New Fuel Return Lines Are Used On Certain C18 Marine Engines {1274} A New Fuel Return Lines Are Used On Certain C18 Marine Engines {1274}
323F SA Excavator and 323F MHPU Machine Systems Cylinder Drift - Check - Empty Bucket
G3500H 50Hz Generator Sets Engine Air Cleaner Element - Replace
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