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Jefffafa 
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Joined: 13 Nov 2025
Location: 17059
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 Topic: Allis Chalmers sickle bar mower
Posted: 13 Nov 2025 at 6:00pm |
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Hi. I have an allis Chalmers 80R3 sickle bar mower. I was wondering if 10w 30 or 40 oil would be good to use in the gearbox?
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
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Posted: 13 Nov 2025 at 7:32pm |
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I would use 90w in it. Tracy.
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No greater gift than healthy grandkids!
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jvin248
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Joined: 17 Jan 2022
Location: Detroit
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Posted: 13 Nov 2025 at 8:12pm |
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80/90W Gear oil. Tractor supply carries it in two and five gallon containers. Auto parts stores have it in quarts.
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Jefffafa
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Posted: Yesterday at 12:31am |
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Ok thank you 👍
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Gary Burnett
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Joined: 11 Sep 2009
Location: Virginia
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Posted: Yesterday at 5:17am |
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If it leaks some go with some or all John Deere corn head grease.
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nella(Pa)
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Location: Allentown, Pa.
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Posted: Yesterday at 6:39am |
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All good suggestions
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DrAllis
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Joined: 12 Sep 2009
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Posted: Yesterday at 11:58am |
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A couple of things on those Twin-Wheel drive mowers: #1. Keep the sickle head bolt TIGHT. This bolt must be a grade 8 quality. #2. Make sure the serrations in the bushing this bolt clamps thru are CLEAN when assembling. #3. Keep the cross-arm snug against the bushing. Any looseness in any of these parts leads to quick destruction of said parts.
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Jefffafa
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Posted: 12 hours 29 minutes ago at 2:32am |
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Ok thank you. I'm just a dabbler with tractor stuff. I have a Kubota L3400 compact tractor with a few attachments, and a neighboring farm had the sickle bar mower, which has been sitting outside for maybe ten years not being used, so they said to try it out. So I'm trying to get it back in running condition hoping to buy it. I'm trying to get all the adjustments as close to what I think they should be, to fit my tractor. (they didn't have an owners manual since they bought it on consignment). On a short trial run, I thought it mowed half decent...Does anyone know what it may be worth?
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Kenny L.
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Joined: 12 Sep 2009
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Posted: 12 hours 17 minutes ago at 2:44am |
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I just bought one last summer that need work for 300
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Tim NH
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Joined: 16 Oct 2012
Location: Lancaster NH
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Posted: 5 hours 24 minutes ago at 9:37am |
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Several years ago I asked the same question on here. One member recommended, straight 30 weight non detergent oil. That oil has worked well in the mower.
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1950 WD 1959 D14 1955 WD45 1976 7000 B 207
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Clay
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Joined: 11 Sep 2009
Location: Udall, Kansas
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Posted: 4 hours 32 minutes ago at 10:29am |
I still use 30 wt. in my 80R mowers. From the lubrication chart on page 4 of the 80R manual: Drive housing capacity, 1 qt. SAE No. 20 or 30. Do not let oil level get below or do not fill above drive shaft.
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 1 hour 42 minutes ago at 1:19pm |
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dont mix gear lube and engine oil... Use one or the other.. Always flush if you change... Years ago i had a mechanic top off a dozer final drive with 15W40 in a 80-90 wt gear case.. Turned it into a black goo after a couple weeks.
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Like them all, but love the "B"s.
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