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I've always found from previous experience that genuine seals are best. Might cost a little more but saves having to do the job twice...
 

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nissan gu td42ti
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They are very good made by Seagull well known seal manufactor they are also called a cassette seal. These seals run 4 or 5 sealing elements to stop crap getting in. They have an internal coated metal sleave which the sealing elements run on, and pre lubricated. Thus no more grooves worn into the spindle axle. Depending on how bad the grooves are you may need to fill them with Devcon or JB weld let cure then machine down to 65mm.
There are few little tricks in installing them.
The seal must be installed the correct way. On one side of the seal its marked bearing side thus this side must be installed towards bearing.
When installing into hub DO NOT oil or grease the outside of the seal use just a little bit of soapy water to lubricated as you press it into the hub.
The ID of the seal that goes over the spindle axle again DO NOT oil or grease it again just a little bit of soapy water to allow it to slide on.
Also check the edge were the seal runs on and make sure you have a lead angle just a 30-40o would be fine. and not a 90o edge again this allows for easier fitment.
Soapy water is to allow for easier fitment and will dry allowing the coated metal OD and ID to grip the hub and spindle.
 
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