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need an engine!

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=40440
Printed Date: 23 Jun 2025 at 4:39pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: need an engine!

Posted By: Pa.Pete
Subject: need an engine!
Date Posted: 12 Nov 2011 at 4:59pm

Does anyone know where I could locate an engine for a John Deere 644 b loader?

It is a 6cyl turbo I believe 531 ci.

Pete

Replies:

Posted By: den/southern illinoi
Date Posted: 13 Nov 2011 at 10:35am

Pete, your PM inbox is full. Thanks, Den

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Own 4 wheel 20, 2-5015, 5020 and associated equipment and 2 electric forklifts.

Posted By: Ages Cat
Date Posted: 14 Nov 2011 at 4:34pm

Someone told me that they are buying JD combines with engines that will drop into JD loaders. Just sharing.

Posted By: Kcgrain
Date Posted: 14 Nov 2011 at 4:54pm

I dont think you have a 531 engine. If its an a or b its probably a 404, the later ones had a 466. If you had a 531 you could tell by the fact it didnt have enough power to get out of its own way and it would have had a ring cast on it where they attatched a chain when used as an anchor.

Posted By: Pa.Pete
Date Posted: 14 Nov 2011 at 6:15pm

Kcgrain wrote:

I dont think you have a 531 engine. If its an a or b its probably a 404, the later ones had a 466. If you had a 531 you could tell by the fact it didnt have enough power to get out of its own way and it would have had a ring cast on it where they attatched a chain when used as an anchor.

It is a 644 B, I'm not sure what year it is though. As for th 531 c.i. I was going by a manual I found online. As for the power it has never had much, it's my Father-Inlaws machine and he has never been happy with it. The engine locked up on it the other day but he tried it again yesterday and it started, but might have spun a bearing. I'm not sure if we will be rebuilding it this winter or find a donor as Cat suggested. If you come accross something that would work please let me know.

This is the section of the manual-

Engine: John Deere turbocharged diesel, vertical 6-cylinder,
valve-in-head, 4-stroke cycle.
Bore and stroke .4.75x5 in. (120.5 mmx127 mm)
Piston displacement. . . . . . . . . . . . . . . . .531 cu. in. (8702 cm3)
Compression ratio 15.8t01
Maximumtorque@ 1500 rpm .' .432Ib-ft (586 Nm) (59.7 kg-m)
NACC or AMA (U.S. Tax) horsepower. . . . . . . . . . . . . . . . . .54.0
Lubrication. . . . . . . . . . . . . . .PressuresystemwIfull-flow filter
Cooling. . . . . Pressurized w/thermostat and controlled bypass
Fan Blower
Air cleaner w/restriction indicator.. . . . . .. ., . . . . .. . . . . . Dry
Electrical system. . . .. .. . ... . . . . ... .. .12-volt wi alternator
Batteries (tWei12 volt) .. . Reserve capacity: 310 minutes each

Posted By: Kcgrain
Date Posted: 15 Nov 2011 at 10:02am

I stand corrected, the 644 & 644a had a 404 the 644b had the 531 and everythng from the b on up had the 466, so you are correct that is the engine you have, which is unfortunate becasue its a huge pig and expensive to overhaul. I would look for a 466 out of a junk yard if I was you a better motor and it had the ability to get out of its own way.

Posted By: ac45
Date Posted: 15 Nov 2011 at 12:00pm

531's are kinda hard to find, find a combine 404 or 466, but you will probabbly need mounts belhousing etc from another machine that had that engine in it

Posted By: Pa.Pete
Date Posted: 15 Nov 2011 at 7:58pm

Thanks for the info guys. We'll have to see what we can figure out.

Pete