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Allis Chalmers sickle bar mower
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Jefffafa View Drop Down
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Joined: 13 Nov 2025
Location: 17059
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jefffafa Quote  Post ReplyReply Direct Link To This Post Topic: Allis Chalmers sickle bar mower
    Posted: 13 Nov 2025 at 6:00pm
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 View Drop Down
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Joined: 11 Sep 2009
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Points: 10853 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Tracy Martin TN Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2025 at 7:32pm
I would use 90w in it. Tracy.
No greater gift than healthy grandkids!
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jvin248 View Drop Down
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Joined: 17 Jan 2022
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Points: 484 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jvin248 Quote  Post ReplyReply Direct Link To This Post 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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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jefffafa Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 12:31am
Ok thank you 👍

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Gary Burnett View Drop Down
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Joined: 11 Sep 2009
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Points: 3104 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Burnett Quote  Post ReplyReply Direct Link To This Post Posted: 22 hours 54 minutes ago at 5:17am
If it leaks some go with some or all John Deere corn head grease.
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nella(Pa) View Drop Down
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Joined: 11 Sep 2009
Location: Allentown, Pa.
Points: 3134 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nella(Pa) Quote  Post ReplyReply Direct Link To This Post Posted: 21 hours 32 minutes ago at 6:39am
All good suggestions
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DrAllis View Drop Down
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Points: 22188 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 13 minutes ago at 11:58am
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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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Jefffafa Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 39 minutes ago at 2:32am
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. View Drop Down
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Points: 1364 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kenny L. Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 27 minutes ago at 2:44am
I just bought one last summer that need work for 300
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