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Need help fixing tachometer on D14

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=30099
Printed Date: 05 Mar 2025 at 1:27pm
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Topic: Need help fixing tachometer on D14
Posted By: jtheise4
Subject: Need help fixing tachometer on D14
Date Posted: 02 May 2011 at 7:53am
The tachometer on my D14 is not functioning.  I'm assuming this is just some sort of gear/cable combination?  Is the cable I have pointed out in the picture the tach cable?  Any thoughts on how to get it working?  Thanks.
 



Replies:
Posted By: JoeO(CMO)
Date Posted: 02 May 2011 at 8:01am
Yes, that is the tachometer drive connection.
When you have it disconnected, check the cable, chances are the trouble is not in the drive at that point but toward the tachometer instead.  If you can pull the cable out of shield you can see the condition of it, whole or twisted off.
The bearing in the tachometer may me tight or whatever and has caused the cable to twist off.


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Posted By: Chris (swIA)
Date Posted: 02 May 2011 at 8:04am
The cable that you pointed out is the tach cable. It is driven off the end of the govenor shaft by an adapter. Unhook the cable where shown and drive it with a cordless drill to check the cable and tach. The adapter is getting hard to find. Hope it isn't that.


Posted By: Gerald J.
Date Posted: 02 May 2011 at 8:14am
Sometimes the square on the end of the cable gets rounded off. A stiff tachometer can often be the cause. The cordless drill test is a good one.

Gerald J.


Posted By: Chris (swIA)
Date Posted: 02 May 2011 at 8:18am
The cable on my 17 is keyed, not square. I don't know if the 14 is the same. The tang on my adapter was gone, probablt from the bad tach ot the cable that was gone when I bought mine.


Posted By: GregLawlerMinn
Date Posted: 02 May 2011 at 10:11am
Best to be setting down when you hear the cost of the little plastic adaptor to go from the square drive cable to the slotted drive in the distributor. I have made the drive adaptor on the end of the cable from an electrical spade terminal soldered to the end of the tach cable. Some filing and plier work required to get it right.

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What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC


Posted By: jtheise4
Date Posted: 02 May 2011 at 10:31am
Originally posted by GregLawlerMinn GregLawlerMinn wrote:

Best to be setting down when you hear the cost of the little plastic adaptor to go from the square drive cable to the slotted drive in the distributor. I have made the drive adaptor on the end of the cable from an electrical spade terminal soldered to the end of the tach cable. Some filing and plier work required to get it right.
Thanks for the warning!!!



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