Construction and other equipment - Detroit Diesel Tachometer Drive:

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Detroit Diesel Tachometer Drive:

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=187017
Printed Date: 30 Nov 2024 at 6:44pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Detroit Diesel Tachometer Drive:

Posted By: Codger
Subject: Detroit Diesel Tachometer Drive:
Date Posted: 13 Mar 2022 at 8:59pm

I have an old TLB with a Detroit 3-53 engine and it's tachometer is missing from the dash. I found the old cable jacket which drove this thing tucked behind the engine against the firewall. I cannot find where this originally connected onto the engine at. There is no drive assembly on either the camshaft, or balance shaft to connect the drive adapter to; only blanking covers. I've never seen them driven anyplace else myself and wondering if anyone else has?

Thanks,

Replies:

Posted By: DMiller
Date Posted: 14 Mar 2022 at 3:55am

Has always been off a cam, engine likely replaced and the drive lost to time at some point as most don’t care when a gauge quits.

Nearly all DD cam gear ends have a drive spline or coupler capability on the old 53s. Just have to order new gaskets and pull covers to validate if still there and then order a tach drive cover from someone that still has one as no longer produced. After that os getting correct direction of rotation adaptor.

Posted By: Codger
Date Posted: 14 Mar 2022 at 6:57am

Thanks. Hard to say about the engine as it's an older TLB. I've only seen the cable driven types driven from the cam, or balance shaft on the inline engines also but thought I'd ask.

I installed a new alternator yesterday with an "R" terminal and planning to install an electronic tachometer to fill the hole in the dash.

Posted By: Tad Wicks
Date Posted: 15 Mar 2022 at 10:47am

Be aware that drives and tachs come in different gear ratios.

Posted By: Codger
Date Posted: 15 Mar 2022 at 6:42pm

Tad Wicks wrote:

Be aware that drives and tachs come in different gear ratios.

Yes, and thank you. I have several of the 90 degree adapters with varying ratios, but didn't see a drive on this engine so figured I'd ask.

I have ordered an alternator driven tachometer which should arrive next week. These are driven by the "R" terminal on the alternator rather than mechanically.