Looking for Replacement Grease Seal for 7k Curt Axle of Brinkley

Question

Question:

Hi, I have a 7K Curt Axle on my Brinkley and plan to repack the bearing this spring. I am looking for the correct seal kit and have conflicting information. Lippert says I need a seal with an O.D. of 3.72 and the ones I am finding on your website state 3.8. I tried to paste my axle tag but not able. The serial is S012935026 and item is 2024057104.

asked by: Scott K

0

Expert Reply:

Hey Scott, for a Curt 7k axle the replacement grease seal would be the part # GS-2250DL which has an outer diameter of 3.38 inches which I think you might have dropped off a number in the number you listed. This is close enough to the number Lippert told you would work and work great. Did you blow out a seal or are you doing some hub maintenance?

expert reply by: Jameson C

0

Scott K.

2/12/2026

Thanks Jameson, Yes, I fat fingered and didn’t proof read - it was 3.38. I didn’t blow a seal (that I know of), just doing my annual repack and the Brinkley is new to us so was looking for the correct parts. Thanks for your help

Jameson C.

2/12/2026

@ScottK Glad to help!

Les H.

2/13/2026

I also use the GS-2250DL and it is still on my 5th wheel. It is still sealing my bearing with no problems. I did upgrade to 8k axles and I’ll be charging all my bearings and seals within the next 2 months.

Len Y.

2/14/2026

The best way to do it is to precisely measure the inside diameter of the housing. The size of the seal will be .001 less than your measurement. When installing the seal, the open end goes in first. It will collapse to tightly fit the opening. The outer, closed end will be stouter due to the extra metal. The housing is slightly tapered at the end, so the seal must be set in a little past flush, past this taper. If the bearing and the seal are the same OD, the seal may go in too far. Not enough and the seal will come back out. too much and it will not contact the surface of the shaft. Better systems utilize 2 IDs, the inner, smaller one for the bearing, and a larger one for the seal. In this case, install the seal all in to the step.

Len Y.

2/14/2026

@LenY OOPS, Sorry. The OD of the seal will be equal to or .001 LARGER than the opening

Jameson C.

2/16/2026

@LenY great tips!

Answer 1

Hey Bryan! I definitely understand not wanting to pull a hub to find the right seal size. It's not the most fun (nor cleanest) job in the world. Without actually doing that and verifying the right size, I can give you an answer that's about…

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Answer 2

Hey Tim, Yes, you can replace that seal with the #GS-2250DL. They are the exact same size seals the only difference is the "R'. The "R" just refers for a rubber coating on the outer diameter of the seal while the #GS-2250DL is a…

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Answer 3

Thank you for the photo; I contacted Lippert with the information you gave me and they told me that you will need Grease Seal #GS-2250DL. This seal has a 2.250" inner diameter and 3.376" outer diameter; the seal you asked about, part…

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Answer 4

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Answer 5

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Answer 6

Hey Matthew! Thanks for providing that axle information. I reached out to Lippert and for bearings you need the Timken #TMK44FR and #TMK75FR. From what they said, your axle came with an oil bath setup so for the seal you need the Unitized Oil Seal…

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Answer 7

You can use the Timken Grease and Oil Seal #TMK98ZR in place of the Grease Seal #GS-2250DL. While they are not exactly the same seal construction it is still a double lip design and the dimensions are the same so they are going to fit correctly.

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Answer 8

I reached out to my contact at Lippert and based on the NV 248685 your 7000lb Lippert axle uses inner bearing #25580, outer bearing #14125A, and grease seal #GS-2250DL. Now this grease seal has a 2.250" I.D. which is the same as the seal you…

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Answer 9

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Answer 11

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Answer 12

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Looking for Replacement Grease Seal for 7k Curt Axle of Brinkley

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