HYDRAULIC FAN SPEED CALIBRATION AND ADJUSTMENT CONTINUED
Calibration for Minimum Fan Speed
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Engine Cooling Fan Minimum Speed calibration screen displays instructions for fan
Top display area displays status parameters that are monitored during calibration.
Middle display area displays information about status of calibration.
Display area on bottom will dsplay conditions for setup and instructions for calibration.
1. Check the following conditions:
a. Set parking brake and operate engine at high idle (TM 5-2410-240-10).
b. Ensure hydraulic oil temperature (Figure 12, Item 1) exceeds 104°F ± 18°F (40°C ± 10°C).
2. Select Next button (Figure 12, Item 5) to start calibration. If conditions for setup are not correct, condition that is
not correct will be displayed in middle display area. Calibration will not start. When conditions are correct,
select Next (Figure 12, Item 5) button to start calibration of fan speed.
3. Record fan speed. Minimum fan speed for machine is 750 ± 50 rpm.
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When right arrow button is selected, sign l to hydraulic demand fan solenoid will be
increased. When signal is increased, fan speed will decrease. When left arrow button is
selected, signal to hydraulic demand fan solenoid will be decreased. When signal is
decreased, fan speed will increase.
When adjusting maximum fan speed and maximum is exceeded, decrease fan speed to
1,000 rpm and then decrease fan speed to minimum fan speed. This will allow fan speed
to be properly set.
Calibration procedure will be stopped for error codes. Correct condition that caused error
code and restart calibration.
Calibration may be cancelled at any time byselecting Cancel button (Figure 12, Item 4).
4. Select left arrow button (Figure 12, Item 3) or select Right Arrow button (Figure 12, Item 2) at bottom of screen
until fan speed is approximately 750 rpm.