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TOPIC: DT250B removing rear hub oil seal?

DT250B removing rear hub oil seal? 10 Jan 2019 01:28 #1

  • Von
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So I guess over the last 43 years somethings can really get stuck. Is there a trick to removing the rear oil seal behind which sits one of the wheel bearings. The hub is off to the soda blaster as soon as I can get this seal out. Thanks.
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Last Edit: by Makotosun.

DT250B removing rear hub oil seal? 10 Jan 2019 05:51 #2

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I soak the perimeter of the seal with penetrating oil and heat the hub with a propane torch several times over 2-3 days. Then use a multi-jaw slide hammer or a hydraulic press depending on what is in the other side. Of course this assumes you will be using new seals and bearings for reassembly.

I have also bought NOS hubs for $75 and then installed new sealed bearings.
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The hours spent riding my Enduros is not deducted from my life span.

DT250B removing rear hub oil seal? 10 Jan 2019 06:01 #3

  • Mr Vegetable Trousers
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I used heat and a blind bearing puller. Just pry the old seal out and fit new.
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Last Edit: by Mr Vegetable Trousers. Reason: Typo

DT250B removing rear hub oil seal? 10 Jan 2019 07:39 #4

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It looks like you have the other side bearing out? I'd use a large rod and knock the remaining bearing out which should take the seal with it.... Using a press would best best if you have one.

Heating the hub around the stuck seal with a propane torch until the seal is literally smoking usually works wonders to free it.
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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

DT250B removing rear hub oil seal? 11 Jan 2019 03:40 #5

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Well it all was too easy. I prepared the press, modified a press plate and both bearings and seal just popped out. No heat required. I was surprised to find two bearings, both of which are stuffed. Looks like the seal can be reused. Some pictures. Thanks for your help.
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DT250B removing rear hub oil seal? 11 Jan 2019 04:17 #6

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I wonder if I'd be better off with new sealed bearings rather than the open bearings originally used ?
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DT250B removing rear hub oil seal? 11 Jan 2019 05:02 #7

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I have the same bike and yes I would recommend new seals and bearings. Replace brake linings too! very inexpensive.

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CT90, TL125, IT175, DT250, MX250, MX360, DT400x2, XR600, DR650, DL1000

DT250B removing rear hub oil seal? 11 Jan 2019 05:18 #8

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jdsmetx wrote: Replace brake linings too! very inexpensive.

Maybe start a new thread on how to do it.
Thanks

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DT250B removing rear hub oil seal? 11 Jan 2019 06:19 #9

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In my opinion, original bearings were open on at least one side so they could be cleaned and re-greased.

Sealed bearings are not that expensive these days... For some models you can find an All Balls kit that includes sealed bearings and wheel seals for good prices.

One warning is it's also possible to find REALLY cheap sealed bearings on ebay and other places... I'd stay away from those and go with name brand bearings from a reputable supplier.
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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

DT250B removing rear hub oil seal? 15 Jan 2019 01:41 #10

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Why stop at just the seal. I had the hub soda basted. Looks like new. Found another local company which will make some custom SS spokes. Getting there.
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