2010/11/15 Caterpillar

Generator Set:

C175-16 (S/N: WYB1-UP)

Description of Change: The new software provides additional functionality to the prelubrication strategy.

The functionality of the new software includes the following features:

• Once the "Engine Prelube" parameter has been set to "Continuous" on in the ECM, the new software will automatically run the engine prelube pump once

• The cycle will repeat at the same time that the interval was set unless the unit is power cycled or started. When the unit is power cycled or started, the clock resets after the cycle or engine stop. The automatic prelube cycle is adjustable to operate between 1 to 14 day intervals

• The timer runs if ECM is powered ("EMCP" set in either "STOP" or "AUTO").

• The pump shuts off after approximately 9 kPa (1.3 psi) of oil pressure is achieved.

This update is only for C175 Generator Sets in stand-by applications. These applications require the unit to start up immediately upon request, in the event of a power outage. The prelube settings for generator sets operating in prime and continuous applications do not require any changes.

Adaptable To: The new software is a direct replacement for the existing software based on the application. Refer to Table 1 for the part numbers of the new software and the existing software.

Software Installation Procedure

1. Install the appropriate software using Caterpillar Electronic Technician (ET).

   The parameter for cool down speed must be set according to the frequency of the generator set. Refer to Table 2.

   If the cool down speed is not set correctly, a 1111-2 Programmable Parameter Fault Data Intermittent diagnostic code will be displayed on the EMCP. Also, a 268-2 Programmed Parameter Fault: Erratic, Intermittent, or Incorrect diagnostic code will be generated in the engine ECM when the software is installed.

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   Table 2

   Frequency	Cooldown Speed
   60 Hz	1800 rpm
   50 Hz	1500 rpm

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Illustration 1	g02335996
Configuration parameters

2. Program the pre-lubrication parameters. Refer to Table 3 for the configuration parameters.
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   Table 3

   Configuration Parameters
   Description	Value
   Engine Pre-Lube	Enabled
   Engine Pre-Lube System Configuration	Continuous
   Engine Pre-Lube Time Out Period	120.000 seconds
   Engine Ready to Start Pre-Lube Duration	120 seconds
   Engine Continuous Pre-Lube Duration	2.00 min
   Engine Continuous Pre-Lube Interval	1440 min

   Note: The interval is adjustable from 1 day (1440 minutes) to 14 days (20160 minutes).

3. Power cycle the ECM in order to trigger the first pre-lube cycle.

   Note: The pre-lube pump should start at the same time the next day unless the engine is power cycled or started. Another power cycle or starting the engine will reset the timer.