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DATACENTER ERROR!!! Внимание! Авария в датацентре!!


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Diagnosis and repair



Spin the fan blade by hand. A light resistance should be felt. If there is no resistance or very high resistance, the minimum and maximum fan speeds must be checked as follows:

Fan Clutch Test-Minimum Speed Requirement
1.Use a suitable marker to mark the water pump pulley, one of the fan blade retaining bolts and the crankshaft pulley.
2.Connect a tachometer to the engine.
3.Install a throttle adjusting tool.
4.Connect the Digital Photoelectric Tachometer.
5.Start the engine and run it at approximately 1500 rpm until the normal operating temperature has been achieved.

WARNING: TO AVOID THE POSSIBILITY OF PERSONAL INJURY OR DAMAGE TO THE VEHICLE, DO NOT OPERATE THE ENGINE UNTIL THE FAN BLADE HAS BEEN FIRST EXAMINED FOR POSSIBLE CRACKS AND SEPARATION.

6.Adjust the engine speed to 2300 rpm.
7.Operate the strobe light at 3000 rpm and aim it at the water pump pulley. Adjust the engine speed until the light flash and the water pump pulley mark are synchronized.
8.Aim the strobe light at the fan blade bolts. Adjust the strobe light until the light flash is synchronized with the marked fan blade bolt (the fan blade appears to stand still).
9.The fan blade speed must not be greater than 1500 rpm at 3000 water pump rpm.
10.Turn the engine off.
11.If the fan blade speed was greater than 1500 rpm, replace the fan clutch.

Fan Clutch Test-Maximum Speed Requirement
1.Perform Steps 1 through 5 of the Fan Clutch Test-Minimum Speed Requirement.

2.Block off areas on each side of the radiator in the engine compartment and the front of the radiator grille. This will raise the temperature of the air striking the fan clutch and should cause the fan blade to operate at maximum speed.

NOTE: The temperature should be above 96°C (205°F) for maximum fan speed.

3.Place the climate control function selector switch in the MAX A/C position and the blower motor switch in the HI position.
4.Adjust the strobe to 3000 rpm.
5.Start the engine and adjust the engine speed until the strobe light flash and the water pump pulley mark are synchronized.

WARNING: TO AVOID THE POSSIBILITY OF PERSONAL INJURY OR DAMAGE TO THE VEHICLE, DO NOT OPERATE THE ENGINE UNTIL THE FAN BLADE HAS BEEN FIRST EXAMINED FOR POSSIBLE CRACKS AND SEPARATION.

6.Aim the strobe light at the fan blade retaining bolts. Adjust the strobe light until the light flash is synchronized with the marked fan blade bolt (the fan blade appears to stand still).
7.If the fan blade speed is less than 2300 rpm, replace the fan clutch.





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