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Replacement Hub Drum for Hayes 8k Trailer Axle  

Updated 10/23/2025 | Published 08/29/2023

Question:

Hi I have a heyes axels on my tp20 ditch witch trailer I need a hub and brake assembly one piece says ae 9080590 also says 4j01 dia 12.090

1

Helpful Expert Reply:

Looks like you have an 8k rated Hayes trailer axle hub which for that would require the part # 8-285-11 for a replacement hub.

expert reply by:
1
Jameson C
Pete profile picture

Pete

10/22/2025

I have the same axle numbers as above (9080590) another code possible a date code (OC26) and 12.090. The part number you have listed is 8-285-11 (4" thread size) does not appear to fit my hub as my hub is 2 3/4" thread size. My hub is also a 4"x12" and I ordered a oil cap rated for 8k axle and the threads are the right size but a finer thread and will not match the more coarse thread of my axle. I do not know what my axle is, something very old or?

Jameson C. profile picture
Etrailer Expert

Jameson C.

10/22/2025

@Pete How old is the trailer?
Pete profile picture

Pete

10/22/2025

@JamesonC I have no idea, its homemade. It looks like maybe ALCO/Dexter. I don't know.
Jameson C. profile picture
Etrailer Expert

Jameson C.

10/22/2025

@Pete So a 12 inch by 3-3/8 inch drum would check out for 8k Al Ko axles but you mentioned 12 by 4. Is there anyway the depth of the drum was actually 3-3/8 inch?
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