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Dirt Bike Discussions By Brand
Suzuki MX & Off-Road Dirt Bikes
Right Crank Seal..Which direction????
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[QUOTE="Bunya, post: 1229587, member: 77196"] That's not entirely true. Yes, increased pressure on the open side will provide greater sealing ability, but a seal will work perfectly fine in neutral pressure. The garter spring provides enough pressure on the lip to maintain an effective seal in the absence of external pressure. There are hundreds of lip seal designs so it's hard to generalize about them. In this case we're discussing crank seals which are going to experience positive, neutral and negative pressure differentials. With this in mind, I would imagine the seals are designed with 2 lips facing opposite directions and a stiffer garter spring to aid in sealing pressure from both directions. Another factor that hasn't been brought up is hydraulic pressure on the gear side. Although there won't be positive air pressure on the gear side, the flow of the oil around the gear may impart a hydraulic pressure in the seal area which may be why Suzuki found it necassary to install it 'backwards' from convention in their newer designs. I'll assume that the engineers that design these things know more about it than us and not second guess their design. This is why I suggested the OP follow the fiche and manual that show it being installed conventionally and put the open side towards the crank. [/QUOTE]
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Dirt Bike Discussions By Brand
Suzuki MX & Off-Road Dirt Bikes
Right Crank Seal..Which direction????
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