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5220 Maxxum Powershift


CentMO3088
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Couple shop notes, did you change the bottom switch? 

51-5200 SERIES POWERSHIFT FAULT LAMP DIAGNOSTIC CODES

1 FLASH – INDICATES MODULE IS RECEIVING NONE OR MULTIPLE SIGNALS

2 FLASHES – INDICATES AN OFF GOING SWITCH FAILURE

3 FLASHES – INDICATES TEMP SENSOR IS OPEN OR SHORTED

4 FLASHES – INDICATES 1 OR MORE SHIFT SOLENOIDS SHORTED OUT

5 FLASHES – INDICATES AN ON COMING SWITCH FAILURE

6 FLASHES – INDICATES NONE OR MULTIPLE SIGNALS DETECTED

MORE THAN 6 FLASHES - AND TRACTOR DRIVES, CLUTCH SWITCH FAILURE

NOTE; LAMP ON STEADY TRACTOR DRIVES - INDICATES MODULE HAS RECEIVED NONE OR MULTIPLE SIGNALS, LAMP SHOULD FLASH 1 TIME WITH CLUTCH PEDAL HELD ON FLOOR.

NOTE; IF TRACTOR IS GIVING 6 FLASHES USING AN OHM METER MEASURE ALL 4 PRESSURE SWITCHES, THE ONE WITH EXTREME HI OR LOW READING IS THE CAUSE

NOTE; THE MOST COMMON IS 2 OR 5 FLASHES

NOTE; ORDER OF CIRCUITS TOP TO BOTTOM IS 3-1-2-4

NOTE; TO READ CODES HOLD CLUTCH PEDAL ON THE FLOOR UNTIL CHECK TRANS LIGHT QUITS FLASHING

NOTE; PRESSURE SWITCHES OPEN ON RAISING PRESSURE

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Disconnect bottom pressure switch and put OHM meter in switch, select 4th gear before start up.........does switch open on raising pressure? If so does it now drive in 4th only? May need to pull test plug just front of switch and pressurize 4th gear. Over on other side of flywheel housing is a plug for engine rotation tool, pull it and have a listen while pressurizing 4th then maybe pressurize another one for comparison. Jumper tube internally maybe out to pasture......

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Well......AFTER ohming out the pressure switches and solenoids and not finding anything out of line.... I discovered the 4th speed clutch pack fuse was blown. Changed it out and problem solved. But.....now I wonder what caused it to blow??

Thanks for everyone's help!

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