What is Difference between 645 and 645B loaders
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=198147
Printed Date: 30 Oct 2025 at 9:22pm
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Topic: What is Difference between 645 and 645B loaders
Posted By: Amos
Subject: What is Difference between 645 and 645B loaders
Date Posted: 10 Nov 2023 at 6:56am
| What are the differences between these two loaders? |
Replies:
Posted By: steve(ill)
Date Posted: 10 Nov 2023 at 8:39am
|
Allis-Chalmers’ main competitors ( https://en.wikipedia.org/wiki/Clark_Equipment_Company" rel="nofollow - Michigan , https://contract295dev.wpenginepowered.com/classic-machines/forgotten-companies/payloaders/" rel="nofollow - Hough & https://en.wikipedia.org/wiki/Caterpillar_Inc." rel="nofollow - Caterpillar ) all had 40 degree steering to either side whereas the 645’s steering angle went to 45 degrees either side of centre. In this form, the 645 was manufactured up to 1972 when an upgrade of the design was undertaken. Principal changes included a new engine, the model 3500-II and the introduction of Allison’s new “soft-shift” modulated transmission. Bucket capacities and tipping loads remained the same. Throughout the upheaval of the https://en.wikipedia.org/wiki/Fiatallis" rel="nofollow - Fiat buy up , the 645B continued in production (as the Fiat-Allis 645B) and was finally declared obsolete in 1981 after some 6200 had been produced. The model 645/645B was the most successful and numerous wheel loader ever manufactured by Allis-Chalmers. ------------- Like them all, but love the "B"s. |
Posted By: steve(ill)
Date Posted: 10 Nov 2023 at 8:40am
|
both machines were excellent loaders........... https://contractormag.co.nz/contractor/645-loader/" rel="nofollow - https://contractormag.co.nz/contractor/645-loader/ ------------- Like them all, but love the "B"s. |
Posted By: Eric B
Date Posted: 10 Nov 2023 at 11:06pm
------------- Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal! |
steve(ill) wrote:Posted By: Amos
Date Posted: 11 Nov 2023 at 6:28am
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interesting history in that link but other than the fuel system and soft shift transmission, there is no other difference mentioned. Reason I am asking is I have a 645B i am using and i found a 645 that is a parts machine condition only. If there is not much interchangeable then its not worth much to me...
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Posted By: Codger
Date Posted: 11 Nov 2023 at 6:43am
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I remember both machines a bit. Not a lot of differences between the two outside of the mentioned ones in the article. Anything that age is going to need some bushing work in the articulation and linkage parts, but IIRC not much was any different between the "B" series and original except the fuel system. To the end user, not much at all. The later "B" series did have a little nicer insulation and air conditioning was an option. Never seen insulation at all in the original series. As far as hard parts I'd think they are very close and if the donor can be had cheap enough, and you have need, the purchase would be justified with the first part swapped. ------------- That's All Folks! |
Posted By: DiyDave
Date Posted: 11 Nov 2023 at 4:14pm
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Not mine, saw this on CL, last night... https://baltimore.craigslist.org/hvo/d/perryville-allis-chalmers-645-wheel/7680889321.html" rel="nofollow - https://baltimore.craigslist.org/hvo/d/perryville-allis-chalmers-645-wheel/7680889321.html ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: Codger
Date Posted: 11 Nov 2023 at 5:25pm
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I don't remember ever seeing that double windshield at all; only the single flat windscreen with wiper. ------------- That's All Folks! |
Posted By: Ian Beale
Date Posted: 13 Nov 2023 at 4:26am
| Wasn't one of the Allis loader line continued in Sweden ? |
Posted By: Eric B
Date Posted: 13 Nov 2023 at 2:29pm
Yes, the company is called Ljungby Maskin. For many years they rebuilt old Allis loaders and then later, (after Allis was all finished so as to not get in trouble with patent laws) they started building new ones. When you check out their design, especially of the loader arms, tilt and cylinder placements they are a true copy of the articulated Allis loaders. They have now gone away from rebuilding Allis loaders and don't supply any such (aftermarket) parts. In the European market, especially, Ljungby loaders are of good reputation, expensive to buy used, even with 20 to 30 thousand hours on the meter. ------------- Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal! |
Posted By: orangeman
Date Posted: 17 Dec 2023 at 11:25am
| As Codger mentioned I think there was a change in the fuel injection pump on the 645B. Bosch comes to mind and Simms. ~ Orangeman |