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Difference in Oil Seals

05 Sep 2015 11:30
jdsmetx
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Difference in Oil Seals #1
I"m changing chain and sprockets on my 75 DT250 and decided I needed to change the wheel bearings to. I went to Partzilla and found the bearing and seal but the seal I need is no longer available. I went to my oil seal web site www.avxseals.com and found a simular size 25x40x7mm but its a type TC oil seal. What is in the wheel is a DD type size 25x40x6mm. Question is, what is the difference between the two types? The cross section doesn't look much different?? Need a little input.

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

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05 Sep 2015 13:37
Enduronut
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Difference in Oil Seals #2
.

Good question . . . don't know, but one of the d's probably stands for double lip . . . or maybe dual/double directional lip

For what bike, or what part number is it . . . I may have it.

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05 Sep 2015 13:52
jdsmetx
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Difference in Oil Seals #3
The seal is for the rear wheel part# 93106-25003-00 and on a 1975 DT250B. The number on the seal is DD25x40x6mm

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

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05 Sep 2015 19:16
Enduronut
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Difference in Oil Seals #4
.

Don't have time to search my box of seals at the moment, but there are some on eBay . . .


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Control your thoughts . . . or your thoughts will control you!.
You can't accomplish . . . what you haven't dreamed!
Don't aim . . . and you'll hit your target every time!
A wise man knows . . . he isn't!
Failure squared . . . equals success!

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05 Sep 2015 19:37
DEET
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Difference in Oil Seals #5
If you can't find them, I have some.
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Where the Yamaha Enduro is still a current model...

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05 Sep 2015 19:43
jdsmetx
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Difference in Oil Seals #6
Thanks EN and Deet. I got one more local source I'm going to try but if it doesn't pan out I'll give you a shout!


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

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05 Sep 2015 20:09
MarkT
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Difference in Oil Seals #7
I think the "DD" stands for "double dust" or something like that. It is a dual "dust" seal not designed to actually seal anything from coming out... it's primarily designed to keep dust (and water) from going in. There is usually no spring...

A TC is a dual lip seal with a spring... the outer lip is a dust seal but the inner lip looks more like it's designed to keep things from leaking out.

If I couldn't get a DD seal, the TC would probably work "OK". But since the DD is available I'd go with that.

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
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23 Oct 2020 16:10
Tjlee
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Difference in Oil Seals #8
Hi Deet and Enduronut,
Saw this post from 2015. I am also trying to find a rear hub DD type seal for 74 DT250
pn 93106-25003-00

everything on ebay is out of stock
Do you have any by chance?
Thx

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24 Oct 2020 07:50
nhsteve
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Difference in Oil Seals #9

jdsmetx wrote: The seal is for the rear wheel part# 93106-25003-00 and on a 1975 DT250B. The number on the seal is DD25x40x6mm


If all else fails Speed and Sport has 72 of them. Maybe over budget at $25.57?

store.speedandsportinc.com/

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