2001/04/23 Caterpillar

Wheel Harvesters:

550 (S/N: 7ZN1-UP)

570 (S/N: 4XR1-UP)

580 (S/N: 7CN1-UP)

Description of Change: A new flash file is now used on the electronic control module of wheel harvesters. The new flash file provides improved control of the servo on the governor of the engine. The improved control prevents the contact of the servo with the low idle and high idle stops which yields a longer service life of the servo.

Adaptable To: The new flash file is effective with 550 (S/N: 7ZN180-UP), 570 (S/N: 4XR181 and 189-UP), and 580 (S/N: 7CN218-UP) Wheel Harvesters. The new flash file is adaptable to first production of the listed wheel harvesters.

1. Refer to the Service Infromation System (SIS) for the proper flash file for your machine. The flash files are listed below.
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   Table 2

   Software for the 550 Wheel Harvester
   Language	Standard Joystick	Mini Joystick
   English - Swedish	190-9022	190-9025
   English - German	190-8973	190-8976
   English - Finnish	196-7405	196-7417
   English - Portuguese	196-7406	196-7418
   English - Norwegian	196-7407	196-7419
   English - French	196-7408	196-7420

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   Table 3

   Software for the 570 Wheel Harvester
   Language	Standard Joystick	Mini Joystick
   English - Swedish	190-9021	190-9024
   English - German	190-8972	190-8975
   English - Finnish	196-7399	196-7413
   English - Portuguese	196-7400	196-7414
   English - Norwegian	196-7403	196-7415
   English - French	196-7404	196-7416

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   Table 4

   Software for the 580 Wheel Harvester
   Language	Standard Joystick	Mini Joystick
   English - Swedish	190-9020	190-9023
   English - German	190-8971	190-8974
   English - Finnish	196-7397	196-7409
   English - Portuguese	196-7398	196-7410
   English - Norwegian	196-7401	196-7411
   English - French	196-7402	196-7412

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Illustration 1	g00792679

2. Before you flash the file to your machine, go into the block diagram and select "Fuellevel" in order to change the calibration settings. Change the "Min" value for the "Fuellevel" to zero and change the "Max" value for the "Fuellevel" to 110.

3. Refer to IQANtalk User Manual, "Updating the Application Software" for instruction on flashing the ".IQA" file to your machine. Download the file.

4. Refer to Operation and Maintenance Manual, SEBU7196, "550 Wheel Harvester, 570 Wheel Harvester, and 580 Wheel Harvester", "Engine Governor Control - Calibrate". Perform the governor calibration that was referenced.

5. Start the engine.

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Illustration 2	g00791847
(1) Low Idle Stop. (2) High Idle Stop.

6. Verify that the governor is not touching high idle stop (2) when the engine is at high idle. Also, verify that the governor is not touching low idle stop (1) when the engine is at low idle. The idle stops are shown in Illustration 2.

   Note: The low idle engine speed is 850 rpm. The high idle engine speed is 2270 rpm.

7. Verify that all of the switches and joysticks function correctly.