Welcome! Please use the navigational links to explore our website.
PartsASAP LogoCompany Logo Auction Link (800) 853-2651

Shop Now

   Allis Chalmers Case Farmall IH Ford 8N,9N,2N Ford
   Ferguson John Deere Massey Ferguson Minn. Moline Oliver

Case Tractors Discussion Forum
:

Case 970 tach

Welcome Guest, Log in or Register
Author 
Dairy Farmer

07-30-2007 13:43:19




Report to Moderator

well i got the new cable for the tach but now the tach needle seems to jump around a lot when the engine is running steady and it says full throttle is 2500 RPMs. Is my tach going bad too? or is there a problem with the sending unit. the needle don't move an amazing amount but just a little the the left and righ.
thanks
DF in WI




[Log in to Reply]   [No Email]
4435

07-31-2007 20:51:28




Report to Moderator
 Did you lube that upper cable before you installed it. in reply to Dairy Farmer, 07-30-2007 13:43:19  
Not to be a smartass or such but it might be that simple. Tom



[Log in to Reply]  [No Email]
Dairy Farmer

08-01-2007 12:28:12




Report to Moderator
 Re: Did you lube that upper cable before you installed it. in reply to 4435, 07-31-2007 20:51:28  
oops fergot to do that. how do you lube it. with what? sorry never had to put one in until now.



[Log in to Reply]  [No Email]
INCase

07-31-2007 09:41:35




Report to Moderator
 Re: Case 970 tach in reply to Dairy Farmer, 07-30-2007 13:43:19  
could be what the others have mentioned. but could be in the tack too. The mechnanical tachs and speedo"s drive a small drum that has a friction couple to the needle. A clock spring takes the needle back to 0. as the speed increases the friction grabs the needle drum more and resists the clock spring thus moving the needle. If the friction drive is too dirty or gummy from age the needle could bounce around as it grabs and lets go. I can"t say what you"re supposed to use to fix or lubricate (if any) these things. You could try a speedo repair place. gaugeguys.com??? I"d say a sparse amount of graphite for the hour meter gears as they can get gummy too and resist the drive cable too much. Is it an open cab? Those gages tend to lead a tougher life too. Good luck.

[Log in to Reply]  [No Email]
Dairy Farmer

07-31-2007 19:29:24




Report to Moderator
 Re: Case 970 tach in reply to INCase, 07-31-2007 09:41:35  
no it has a cab. it worked fine before the old cable went caput. now it bounces around thanks



[Log in to Reply]  [No Email]
ihr190

07-30-2007 17:39:39




Report to Moderator
 Re: Case 970 tach in reply to Dairy Farmer, 07-30-2007 13:43:19  
DF, Its probably then the tach drive gear.This runs off of the cam, and it is what the cable connects to going into the block. It is still available, and costs around $100. I had the exact same problem with my 770. New cable, and tach, still the needle only jumps. You also need a special puller to remove tach drive. It is a pressed fit into the block. My dealer will rent it to me for $15. I hope this helps.

[Log in to Reply]  [No Email]
JoeBob/IN

07-30-2007 18:50:30




Report to Moderator
 Re: Case 970 tach in reply to ihr190, 07-30-2007 17:39:39  
The tach drive puller is easy to make and most likely it is the tach drive. They have a resin gear that wears and causes all sorts of problems.



[Log in to Reply]  [No Email]
[Options]  [Printer Friendly]  [Posting Help]  [Return to Forum]   [Log in to Reply]

Hop to:


TRACTOR PARTS TRACTOR MANUALS
We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]

Home  |  Forums


Copyright © 1997-2023 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy

TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters

Website Accessibility Policy