How does a 7000 Allis have 12 speeds?
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=133210
Printed Date: 13 Jun 2025 at 10:35pm
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Topic: How does a 7000 Allis have 12 speeds?
Posted By: DougG
Subject: How does a 7000 Allis have 12 speeds?
Date Posted: 30 Dec 2016 at 4:21pm
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I think I've asked this question before, can't remember, any ways I kno a 7000 is just a glorified 200, but how did the engineering guys get 12 speeds in the 7000 ,tractor?
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Replies:
Posted By: Charlie175
Date Posted: 30 Dec 2016 at 4:27pm
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4 gears with 3 speed power shift.
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Charlie
'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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Posted By: injpumpEd
Date Posted: 30 Dec 2016 at 4:56pm
The 190/200 power director is high for direct drive, and then low is under drive or a gear reduction. The 7000 tractor added the third speed to the power director which is over drive. Works a lot like an Oliver/White Over/Under.
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Posted By: DougG
Date Posted: 30 Dec 2016 at 5:24pm
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So more clutches in the PD? Another clutch pack ? Curious how this works
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Posted By: MACK
Date Posted: 30 Dec 2016 at 9:23pm
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Three splined shafts ( running different
speeds) coming into clutch assembly. Only one clutch pack engaged at a time. MACK
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Posted By: DrAllis
Date Posted: 01 Jan 2017 at 9:44am
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Low range (under-drive) has 4 discs.....Medium range (direct-drive) has 3 discs.....High range (over-drive) has 2 discs. These 70261212 clutch discs are stronger and transmit more torque than the older P.D. clutch discs and will not break in two. Direct fit into older tractors.
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