D-21 Questions
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=40897
Printed Date: 31 Oct 2025 at 1:52am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D-21 Questions
Posted By: Gary198101
Subject: D-21 Questions
Date Posted: 21 Nov 2011 at 2:19pm
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I am wondering what the best battery for a D-21. Recently I started mine thats been sitting for 7 years. I put a boat (marine) battery in it but it just wasnt enough to spin it over fast enough to crank, so after adding jumper cables from an F-250 straight to the starter, it still wasnt enough, but I added a high amp battery charger to the marine battery and got it going. Now to my question, I am going to have to buy atleast two batteries for it, I have seen some real big batteries that I assume are used in farm equipment. The times I have worked on 18-wheelers they have 4 batteries. I only have limited room in the battery box, so I am looking to see what others use, one of those huge 12 volts or two smaller ones, if so what group or type battery would you suggest? ------------- D-21 Series II Turbocharged |
Replies:
Posted By: Orange Blood
Date Posted: 21 Nov 2011 at 2:26pm
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If everything is in good shape, connections, grounds, solenoid, starter, and batteries.....two of the big boys will spin that motor over plenty fast. ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: Gary198101
Date Posted: 21 Nov 2011 at 2:33pm
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Do you happen to know what group of battery? That battery box is only so big. As a matter of fact I have the battery box off of it right now putting a new bottom in it, it rusted out.
------------- D-21 Series II Turbocharged |
Posted By: darrel in ND
Date Posted: 21 Nov 2011 at 3:09pm
| I think that it takes 2 of the 27 group. Darrel |
Posted By: Clay
Date Posted: 21 Nov 2011 at 3:12pm
| The depth of the box is important. Make sure it is at least as deep as the original. You do not want the battery post to contact the battery cover. |
Posted By: Gary198101
Date Posted: 21 Nov 2011 at 3:56pm
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Thanks Clay. Its going to be the same size as the original, the rest of the box is fully intact so I am just going to take some angle iron and frame out the bottom and add some steel sheet or expanded metal to the bottom to reinforce it.
------------- D-21 Series II Turbocharged |
Posted By: Orange Blood
Date Posted: 21 Nov 2011 at 4:13pm
------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Gary198101 wrote:Posted By: Gary198101
Date Posted: 21 Nov 2011 at 4:28pm
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Thanks, I am pricing two 27's for it, cheapest I have found them here is 78.00
------------- D-21 Series II Turbocharged |
Posted By: D-17_Dave
Date Posted: 21 Nov 2011 at 4:36pm
| A marine battery is totally wrong. They are made to release a low amp draw over a long period of time. You need as high an amp battery as you can get near to a group 31 as you can fit. Multiple batteries paralleled will give you maximum amp release so the engine will spin up as needed for cranking. As mentioned above, the cables and all connections should be of proper size and in good clean condition to make the most of the batteries output. |
Posted By: Gary198101
Date Posted: 21 Nov 2011 at 5:28pm
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Thanks Dave for your reply. I noticed something today I am gonna have to do something about, the clamps (metal piece) that holds the back passenger tire on, are rusted very badly, so I will have to replace those and the bolts. I need to figure out who has them and how much they cost. This old girl is eating me alive, thats what a 7 year sit will do to them though.
------------- D-21 Series II Turbocharged |
Posted By: BLee Mn
Date Posted: 21 Nov 2011 at 9:56pm
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i put 2 interstate group 31s in mine ------------- Cowboy UP |
Posted By: Gary198101
Date Posted: 21 Nov 2011 at 10:04pm
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That may be a good option to look into, most of what I have found has been lesser known battery makes, it doesnt really matter too much though I dont use the tractor all that often.
------------- D-21 Series II Turbocharged |
Posted By: DougS
Date Posted: 21 Nov 2011 at 10:12pm
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You'll probably find that an Optima group 27 will perform at about the same level as another's generic group 31. You're going to pay a premium for an Optima, but they are far superior at heat and vibration tolerance. They are also maintenance free. No more corrosion at the battery terminals. None. There's nothing wrong with using a marine grade battery. They are essentially glorified deep cycle batteries. The problem is the cost. You really don't need a deep cycle battery for cranking an engine. |
Posted By: Gary198101
Date Posted: 21 Nov 2011 at 10:19pm
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Doug, The marine battery was just to get her going this one time, I wanted to get it out of the weather and under a shed. I am rebuilding the battery box then I have to address a problem with the steering, I think I have a bolt that rusted out. I ran into a major problem by seeing the bolts and clamps that hold the rear tire on have rusted out badly and from the few people I talked to about it today, that those parts may not be available or very high priced. ------------- D-21 Series II Turbocharged |
Posted By: DougS
Date Posted: 21 Nov 2011 at 10:50pm
| I tried to get down to the river near Port Gibson last May, Gary. High water kept me away. I may give it another shot next year. Have the D21 up and running. I'd like to have a look. |
Posted By: Gary198101
Date Posted: 21 Nov 2011 at 10:53pm
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Sure Doug anytime. My e-mail is Gary198101@aol.com Drop me a line and we will set something up. I hope to do a little more work on it this week, bad weather supposed to be coming in tomorrow.
------------- D-21 Series II Turbocharged |
Posted By: Jordan(OH)
Date Posted: 22 Nov 2011 at 6:10am
| go for 2 group 31 if they fit. Rim clamps should be easy to find. If they are non power adjust i will have some available. How cold does it get in ms? |
Posted By: BobHnwO
Date Posted: 22 Nov 2011 at 7:49am
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My 7060 has 2 1200 amp batteries.
------------- Why do today what you can put off til tomorrow. |
Posted By: Eric[IL]
Date Posted: 22 Nov 2011 at 9:13am
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I second the Optima Red top batteries as a good investment for replacement batteries. Initially, you will not like the purchase price, but you will learn to love these dry cell batteries. Their sizes are limited, so sometimes you can not use them. You need to communicate your dimensions to your supplier.
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Posted By: Gary198101
Date Posted: 22 Nov 2011 at 9:22am
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It does get chilly down here but no single digit temps or anything. The D-21 has always had to spin over a lot more than any of my other equipment, so a strong battery should be a given. ------------- D-21 Series II Turbocharged |
Posted By: Slade (TN)
Date Posted: 22 Nov 2011 at 11:37am
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Two group 31's as stated above should be sufficient.....and look at your cables....I use 1/0 on everything and the solder -on ends.....hth Slade
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Posted By: Gary198101
Date Posted: 22 Nov 2011 at 11:54am
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Hey Slade, The cables are in good shape, thick and soldered on. The tire worked out well. ------------- D-21 Series II Turbocharged |
Posted By: DougS
Date Posted: 22 Nov 2011 at 1:30pm
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Solder makes for a fine mechanical connection but it is very resistive. Automotive stores just don't sell heavy enough cables. I use welding cable and good solid crimp connections. Of course I have access to a good heavy crimping tool. Check with your local mechanics. You may find one with a good crimping tool. Those of you who are still running 6 volts pay special attention.
If anyone is familiar with the large tool that a vet uses to fix a "gonna be" steer, that's how large my crimpers are. The handles are about 3 feet long.
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Posted By: Gary198101
Date Posted: 22 Nov 2011 at 1:34pm
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Doug, that sounds like weapons not crimpers. The cables are in really good shape, I am guessing the tractor I have was built before 1970, my grandfather thinks at one time it may have been 4 6volt batteries in it, but the sticker on the battery box says 12volt negative ground system. Trying to find the cheapest solutions to fixing the problems, as I said it don't get used much but I finally was at a point I didn't want it sitting in the weather anymore. When he bought the tractor back in the late 90's he drove it back from upstate Mississippi a distance of about 60 miles. ------------- D-21 Series II Turbocharged |
Posted By: Orange Blood
Date Posted: 22 Nov 2011 at 2:15pm
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You know Gary, if she is going to eat you alive, you better come let me take her off your hands before there isn't anything left of you!! :-) I'll make it as painless as possible!! ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: Gary198101
Date Posted: 22 Nov 2011 at 2:46pm
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Orange Blood, send me a message with your e-mail address, I will send you some pictures of it.
------------- D-21 Series II Turbocharged |
Posted By: TerryMO
Date Posted: 22 Nov 2011 at 2:57pm
| Gary, Send me some pictures too!!! Terry |