Farm Equipment - 170 175 tach

Print Page | Close Window

170 175 tach

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=200716
Printed Date: 15 May 2024 at 2:48pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 170 175 tach

Posted By: rick ky
Subject: 170 175 tach
Date Posted: 04 Apr 2024 at 5:36pm

put together allis motor 226 with alternator from 236 diesel, everything is coming together fine. red light works when key is turned on, goes out when oil pressure is increasing. alternator is putting out 14 volts. fuel gauge is working properly. temperature gauge working, increasing when motor is warming up. tach is running around 1,000 on low idle, but it buries the needle at half throttle. parts book shows 2 different tachs, 1 for gas and 1 for diesel. we know the tach is original for the dash, it is a gasoline engine tach. what thoughts are out there on how possibly to fix the problem? we want the tractor to operate as close to new as my nephew will have his wife driving the square baler while he is loading the wagon.

Replies:

Posted By: JC-WI
Date Posted: 04 Apr 2024 at 5:47pm

Got the wrong size pulley on alternator?

-------------
He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."

Posted By: rick ky
Date Posted: 04 Apr 2024 at 5:51pm

what size is a suggested diameter choice. thanks for input

Posted By: captaindana
Date Posted: 04 Apr 2024 at 7:46pm

If the rear of the alternator drives the tachometer, I thought there was different size gears in there for different applications

-------------
Blue Skies and Tail Winds
Dana

Posted By: rick ky
Date Posted: 10 Apr 2024 at 6:29pm

just fishing to see if anyone has come up with any ideas on changing gear in alternator or what size pulley should be on alternator

Posted By: rick ky
Date Posted: 16 Apr 2024 at 5:02pm

okay boys and girls we have put the largest pulley on alternator. what suggestions do you mechanics have now. is it in the tach drive on back of alternator. thanks to anyone able to shed any info on this problem. thanks again

Posted By: Oldoug
Date Posted: 16 Apr 2024 at 5:16pm

Check the drive gears on the alternator and count the teeth for starters...big gear should be 46 if I remember correctly...some people have accidentally put 43 tooth gears in them and the tach reads faster.

-------------
Matt Folkers

FOLKERS RESTORATION

Restoring vintage things to last so the future can enjoy our past.

Posted By: rick ky
Date Posted: 17 Apr 2024 at 8:32pm

thanks doug