Farm Equipment - tach drives

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tach drives

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=204247
Printed Date: 23 Nov 2024 at 2:11am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: tach drives

Posted By: d17brown
Subject: tach drives
Date Posted: 20 Nov 2024 at 6:31pm

It appears there are two different ratio drives for the alternator drives for the tach. Does anyone have the slower ratio drive set up

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phil

Replies:

Posted By: KJCHRIS
Date Posted: 20 Nov 2024 at 9:03pm

12 & 45 tooth are the only one I remember on an Allis that's alternator driven.

I think MF used similar on a few models but no experience with them.

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AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,

Posted By: steve(ill)
Date Posted: 20 Nov 2024 at 10:07pm

pulley size also effects alternator speed

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Like them all, but love the "B"s.

Posted By: KJCHRIS
Date Posted: 20 Nov 2024 at 11:50pm

Yes, pulleys differ and can really change speed of alternator.

Sorry, My notes don't have the offset dimensions.

PULLEY SIZES

170, 175, 180, 185 use; a 1/2" belt x 3 15/16" OD x .670" bore.

190, 190XT and F & G combine; a 1/2" x 3" OD x .670 bore.

200; 2 of 1/2" belt x 3 1/8" OD x .670" bore.

D19, 210, 220; 2 of 1/2" belt x 3 1/4" OD x .670" bore.

7000; 2 of 1/2" belt x 3 1/2" OD x .670" bore. wider offset.

6060, 6070, 6080, 7010, 7020, 8010; 2 of 1/2" belt x 3 1/2" OD x .670" bore. narrow offset.

Bigger model 7000's and 8000's use 2 pulleys; 1 narrow offset w keyway & 1 wider no keyway both 3 1/2" OD & use 2 of 5/8" belts.

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AC 200, CAH, AC185D bareback, AC 180D bareback, D17 III, WF. D17 Blackbar grill, NF. D15 SFW. Case 1175 CAH, Bobcat 543B,

Posted By: Alvin M
Date Posted: 21 Nov 2024 at 5:51am

M F is 14x23 that will change the tack speed I had some like over the years AC is 12x45