Tachometer for 8010

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I have an 1984 8010 that the tach reading seems to be off somewhat.  At idle (700 to 1000 rpm) it seems to be correct, but the more rpm that is added the more the tach seems to be off.  At 1700 rpm according to the tach the engine seems to be running about 2200 rpm (just from the sound of the engine).  Also at full throttle it will only achieve 1900 rpm.  Could this be a problem with the pick up sensor on the bell housing?   I read somewhere that the resistance at the senser should be between 100 and 500 ohms, but I have read post on here that it could be a problem with the altnernater.

Thanks

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
ChadB Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 22 Nov 2009 Location: Independence, K Points: 76	Post Options Post Reply Quote ChadB Report Post Thanks(0) Quote Reply Topic: Tachometer for 8010 Posted: 03 Mar 2010 at 6:49am
	I have an 1984 8010 that the tach reading seems to be off somewhat. At idle (700 to 1000 rpm) it seems to be correct, but the more rpm that is added the more the tach seems to be off. At 1700 rpm according to the tach the engine seems to be running about 2200 rpm (just from the sound of the engine). Also at full throttle it will only achieve 1900 rpm. Could this be a problem with the pick up sensor on the bell housing? I read somewhere that the resistance at the senser should be between 100 and 500 ohms, but I have read post on here that it could be a problem with the altnernater. Thanks

Sponsored Links

monitordoc Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 15 Feb 2010 Location: Minnesota Points: 187	Post Options Post Reply Quote monitordoc Report Post Thanks(0) Quote Reply Posted: 03 Mar 2010 at 9:55am
	IF YOUR TACH IS SHOWING RPM AND ADDING HOURS THE TACH IS OK. PROBLEM IS PROBABLY DIRTY GROUNDS. NEIHOFF ALTS. WHEN THEY WEAR OUT CAN TAKE OUT THE TACH AND THE ALT. LITE IN THE LITE BAR ABOVE. CHECK THE CLEARANCE OF THE SENSOR. I THINK THEY ARE APPX. 10 THOUSANDS.
	WD,D17-S4,180,D21