On the hunt for an oil plug
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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=186152
Printed Date: 19 Jul 2025 at 10:05pm
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Topic: On the hunt for an oil plug
Posted By: tthams
Subject: On the hunt for an oil plug
Date Posted: 01 Feb 2022 at 5:50pm
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I am in the process of changing out the oil in the MFWD on our 8070 as part of maintenance. One of the oil plugs is getting worn after 40 plus years with the 10MM hex head, and I want to put a new plug in. I have talked to Robinson Implement, and the part is discontinued. I can't imagine the plug is hard to find in a parts store, but it is. A standard 1/2 plug won't work because of the threads. It looks to be metric maybe a 16m or a 20m but unsure what to try and order online. I plan on calling some salvage yards tomorrow, but wondering if anyone knows the correct part measurement for the two plugs in the front 4x4 housing on an 8070? I came across this part number, but unsure if it would work? 702-72-732 Thanks! |
Replies:
Posted By: steve(ill)
Date Posted: 01 Feb 2022 at 5:57pm
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I would take it to the local hardware store and look at the metric bolt section... They have "coarse" and "fine" threads just like the SAE bolts.. Thread will be called something like 1.5 or 1.75 ... bolt can be 16mm or 20 mm.. That will get you the SIZE, then you can buy a short bolt and cut off what you dont need, or go online and buy a PLUG of the right size.. ------------- Like them all, but love the "B"s. |
Posted By: DiyDave
Date Posted: 01 Feb 2022 at 6:04pm
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Try McMaster-Carr? https://www.mcmaster.com/plugs/" rel="nofollow - https://www.mcmaster.com/plugs/ ------------- Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need! |
Posted By: orangereborn
Date Posted: 01 Feb 2022 at 6:15pm
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Have your auto parts store try Dorman products....At least you will get a size to work with.... or maybe start here
https://www.metricmcc.com/910-a4-316-stainless-metric-parallel-thread-hex-pipe-plug-p-17149.html" rel="nofollow - https://www.metricmcc.com/910-a4-316-stainless-metric-parallel-thread-hex-pipe-plug-p-17149.html HTH...Dale |
Posted By: steve(ill)
Date Posted: 01 Feb 2022 at 6:17pm
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If it is a 10mm ALLEN wrench drive, that normally matches to a 20mm plug.. 20mm is 1/32 of an inch BIGGER than 3/4 inch.  ------------- Like them all, but love the "B"s. |
Posted By: cowkicker
Date Posted: 01 Feb 2022 at 6:52pm
| I weld 1/2" nuts to them and then a 3/4" wrench will take them out. If you do the one on the outside rim of the hub, you will have to remove it to take the wheel off. |
Posted By: tthams
Date Posted: 01 Feb 2022 at 6:56pm
| Wow, that was quick. Thanks for the responses! |
Posted By: Lonn
Date Posted: 01 Feb 2022 at 9:59pm
BTW I still hate metric because the differences are so slight just like grabbing a 10 mm wrench when it really is an 11 mm bolt head. It's not like the difference between 7/16 and 1/2 which is much easier to differentiate. ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
steve(ill) wrote:Posted By: injpumpEd
Date Posted: 02 Feb 2022 at 7:15am
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One nice thing about metric fasteners, is you can measure the diameter at the threads to determine what it's diameter is. I use the wide part of the caliper jaw to bridge across the thread peaks, and a 20mm might measure 19.8 or 19.9 and change. Once diameter is determined, now you can use other bolts like Steve mentioned and use a known bolt thread pitch to match the threads on, most likely a 20mm would be 1.5, 1.75 or 2.0 thread pitch. Knowing the exact size will then allow you to look at the auto parts store there's many replacement drain plugs for cars and trucks, many of which are metric. ------------- 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! |
Posted By: tthams
Date Posted: 02 Feb 2022 at 8:13am
| Thanks again for the replies everyone. I tried our local implement stores with no luck. I will try our auto parts stores next with this new information. |
Posted By: Lynn Marshall
Date Posted: 02 Feb 2022 at 9:43am
| You might try Western Iowa Implement at Pomeroy. 712-468-2217. Part # 70272732. |
Posted By: Mikez
Date Posted: 02 Feb 2022 at 6:52pm
| my neighbor put a quick change valve in my 6080. Works great |
Posted By: Unit3
Date Posted: 03 Feb 2022 at 5:39pm
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Carroll Imp in Lu Verne, Iowa will have them. 515-882-3261 I drove a torx bit into one to get it out. Are they a metric bolt thread or are they a metric pipe thread? I don't remember any tapper. When refiling the final drives, the book shows a pic of the oil fill stamped on the side as level. I would say to leave them just a little bit low. When warmed up, the final drive builds up pressure and will start the big outer seal to leak. Been there, done that ,,,,,,, twice. ------------- 2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C |
Posted By: tthams
Date Posted: 03 Feb 2022 at 7:25pm
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Thanks. I got a variety of M18 and M20 coming on Friday with different pitches. One of them has fit. I truly enjoy this forum and everyone always willing to lend a helping hand. Thanks again! |
Posted By: orangereborn
Date Posted: 03 Feb 2022 at 8:15pm
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Posted By: tthams
Date Posted: 03 Feb 2022 at 8:34pm
| The plan is to head to the farm on Sunday if my kid's significant others done have plans to stop by. I'll try and update when I can. |
Posted By: tthams
Date Posted: 06 Feb 2022 at 5:34pm
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For those wanting to know the oil plug for the MFWD in our 8070 was M20 x 1.50. Here is the link to what I bought if it helps anyone! ( http://https://www.amazon.com/gp/product/B07QSYZPD5/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1" rel="nofollow - DORMAN OIL PLUG ) It was $4.28. It fits like a glove!  |