T500 crank seal fitment

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A.Holley
Around the block
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Suzuki 2-Strokes: T500, 1200 Bandit, 125 Stinger, Triumph R3

T500 crank seal fitment

Post by A.Holley »

Ok, have got my new seals ready to be fitted. Have even split the crank apart to get to the centre bearing. Luckily all the bearings are in good condition so it’s just the seals to be replaced.
I have been looking in all the info I have as to which way round the seals are fitted to the bearings. Nothing I have seen is really clear.
Does the flat side of the seal face in or out on each bearing?

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Andrew Holley
dollydog
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Re: T500 crank seal fitment

Post by dollydog »

i always fit them flat side away from the bearing [the outer 2 seals] and put a light smear of grease all round them :D
cheers, dd.
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dorT500
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Suzuki 2-Strokes: '75 T500M since '93 Ridden it over 100,000 mi
Location: Galveston County, Tx.

Re: T500 crank seal fitment

Post by dorT500 »

A.Holley wrote:..........Have even split the crank apart to get to the centre bearing............
I have been looking in all the info I have as to which way round the seals are fitted to the bearings. Nothing I have seen is really clear.
Does the flat side of the seal face in or out on each bearing?...
Yes,cupped/open spring side into center bearing. What position did you find the old ones in? I have read on one or two occasions about someone finding that someone had installed center crank seals backwards from what they should have been.


Image

http://www.knalnaarpotz.nl/onderdelen/c ... gnjg0hpg62" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

You are replacing the four 'O' rings also, right?


It's not everyone that wants to split/re-build a twin and up crankshaft......certainly not me. :|

What set up did you use....something like this?


:arrow: http://www.ozebook.com/compendium/t500_files/crank.htm" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;

Image
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A.Holley
Around the block
Posts: 58
Joined: Wed Jan 27, 2016 2:50 am
Country: Australia
Suzuki 2-Strokes: T500, 1200 Bandit, 125 Stinger, Triumph R3

Re: T500 crank seal fitment

Post by A.Holley »

Yes , I am replacing the 4 O rings as well. At least I don’t have to stretch the centre bearing ones to get them on. And am using those specs to press it back together.
I just had a look at the genuine Suzuki factory service manual, on page 60 there is a technical drawing of he crank and it shows the seals for the centre bearing. It has the flat side facing towards the bearing and the lip and spring towards the crank.
Actually this seems logical to me as that is how the outer seals are orientated. Spring side to crank.
Any one else have any thoughts on the matter?
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dorT500
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Joined: Mon Jun 12, 2017 12:01 pm
Country: USA
Suzuki 2-Strokes: '75 T500M since '93 Ridden it over 100,000 mi
Location: Galveston County, Tx.

Re: T500 crank seal fitment

Post by dorT500 »

Well I'll be damned.....I just called Bill Bune enterprises who has done hundreds of these cranks and you are correct. Spring side toward crank and make sure oil port of bearing clears tabs/feet on the seals. Makes sense to me now, when I remember about the pressure and vacuum created in the crank chamber. Good catch. :up:

For further confirmation you might try here... Pete O'Dell......http://www.themotorcycleworks.co.uk/ind ... gineering/" onclick="window.open(this.href);return false;
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