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Technical info for the 380 -> Sprintex,SMT6,etc	Message format

Administrator

Posted 26/10/2012 19:16 (#14591)
Subject: Sprintex bearing failure

Frequent flyer Gold

Posts: 1093
1000

Location: An island off southern Tasmania.

Here is where the problem is when it gets noisy or seizes.

hardest part is getting the helical gears off...its a left hand thread allen bolt.

for me the bearing race just disintegrated as per attached pics.

enjoy...

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Administrator

Posted 26/10/2012 19:20 (#14592 - in reply to #14591)
Subject: Re: Sprintex bearing failure

Frequent flyer Gold

Posts: 1093
1000

Location: An island off southern Tasmania.

that's my blood...razor sharp edges on the screws....

wsbtt

Posted 26/10/2012 22:47 (#14594 - in reply to #14592)
Subject: Re: Sprintex bearing failure

Frequent flyer Gold

Posts: 421
100

Location: Brisbane,qld

which charger is that, the series 5, you can see the bearing got rather hot

Administrator

Posted 27/10/2012 16:43 (#14596 - in reply to #14594)
Subject: Re: Sprintex bearing failure

Frequent flyer Gold

Posts: 1093
1000

Location: An island off southern Tasmania.

wsbtt - 26/10/2012 22:47

which charger is that, the series 5, you can see the bearing got rather hot

series 5 it is indeed....it used a 1/4 of a tank in 40 kilometres...so worked it pretty hard.

Gotta open up the oil weep hole to give it much more oil, seems like a design issue to me....about the third one I have had do it.

Symptoms are noisy and rattling sound.

Administrator

Posted 2/11/2012 20:10 (#14597 - in reply to #14591)
Subject: Re: Sprintex bearing failure

Frequent flyer Gold

Posts: 1093
1000

Location: An island off southern Tasmania.

Just for anyone's information, the cog gears in the neck are held on with allen bolts.
The "master" driven cog is RH thread, the "slave" cog is LH thread.
saves breaking it by turning it in the wrong direction...LOL

My failed bearing was the slave as pictured.
How does just one bearing fail? stuffed if i know....

anyway changed them both.

Administrator

Posted 13/11/2012 19:32 (#14610 - in reply to #14591)
Subject: Re: Sprintex bearing failure

Frequent flyer Gold

Posts: 1093
1000

Location: An island off southern Tasmania.

Unit fixed...perfectly.

80 bucks worth of bearings, double race bearings by NTN 5205C3 is the part number for both.

Funnily, both swim in the same oil and the other one is fine...see photos?

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BongoKongo

Posted 3/9/2013 20:27 (#15643 - in reply to #14591)
Subject: RE: Sprintex bearing failure

Posts: 5

Hmm,,, i had better be careful because I have a Sprintex S5-335 bolted onto my BA Falcon 4.0 6yl.
And Just like yours, it can be a bit of a Pie cooker too.

FYI-Too much oil cooks those bearings & not enough seizes them.
Finding the happy medium is the hard thing because Sprintex suggested fluid levels come from a blower sitting on a work bench & the correct oil levels can be a little different in the real world.
Mine isn't a direct feed version & it takes 60mil exactly, & any more oil than that it gets pie cooking hot.
Any less than 60mil & it runs noisy as shit.

But just remember not to run it with too much oil or you will overheat & kill the bearings in No time flat.

Administrator

Posted 3/9/2013 21:11 (#15644 - in reply to #14591)
Subject: Re: Sprintex bearing failure

Frequent flyer Gold

Posts: 1093
1000

Location: An island off southern Tasmania.

I think I am giving it too much oil...thanks heaps for the heads up.

the sprintex kit has a weep nozzle that blocks up so I opened it up a bit...

Which oil are you using?

might try your way.

BongoKongo

Posted 3/9/2013 21:48 (#15650 - in reply to #15644)
Subject: Re: Sprintex bearing failure

Posts: 5

Administrator - 3/9/2013 21:11

I think I am giving it too much oil...thanks heaps for the heads up.

the sprintex kit has a weep nozzle that blocks up so I opened it up a bit...

Which oil are you using?

might try your way.

I use Redline 75W90ns (hard to believe but the ns stands for "non slippery"

blower

BongoKongo

Posted 3/9/2013 21:58 (#15651 - in reply to #14591)
Subject: Re: Sprintex bearing failure

Posts: 5

I forgot to add that the fitted Supercharger orientation makes a difference to the amount of fluid that is needed. I have an fluid level chart for each fitted orientation of the S5 series saved somewhere. I will find it tomorrow & post it, or you can check Sprintex, they used to have one on their site.

Edited by BongoKongo 3/9/2013 21:59

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