(Edit) Pinion valve rebuilds

scarecrow · Post by **scarecrow** » Thu Aug 12, 2010 9:58 am

I'm sure there's an opportunity for one of you guys with some mechanical nous to put together some kits for sale - how much do pleidays charge to refurbish a strut these days?

Post by **docchevron** » Fri Aug 13, 2010 2:05 am

Oscar wrote:Well, the pinion valve rebuild kit arrived first class yesterday. Now I have to find my spare pinion valve - I hope I haven't junked it.

I have a few kicking about should you need one mate.

Oscar · Post by **Oscar** » Fri Aug 13, 2010 3:55 pm

Thanks Doc

I just found it - it's the one that I didn't rebuild properly the first time around. I've got the special tools now - set of sliders and drivers - so should go better this time around, if I can work out where the third seal goes.

Oscar · Post by **Oscar** » Fri Aug 13, 2010 4:47 pm

Right, puzzled it over and worked out what each part of the special tool kit is for. Two internal gaskets, the pinion unit, and one of the sliders are in the freezer to cool down and contract, although I don't know whether -15 will make a huge difference.

Post by **mat_fenwick** » Fri Aug 13, 2010 9:34 pm

We use liquid nitrogen at work, so if you're still struggling I may be able to help...

Way2go · Post by **Way2go** » Sat Aug 14, 2010 2:58 am

mat_fenwick wrote:We use liquid nitrogen at work

Ahhh, creates the ability to smash rubber balls with mercury hammers!

Oscar · Post by **Oscar** » Sat Aug 14, 2010 1:57 pm

mat_fenwick wrote:We use liquid nitrogen at work, so if you're still struggling I may be able to help...

Pop some in the post to me, would you?

Does anyone have any spare vacuum around that I could borrow, as well?

scarecrow · Post by **scarecrow** » Sat Aug 14, 2010 2:35 pm

How's the fix going Oscar? I don't understand even what the fdv is, let alone the need to freeze the "sliders", but I have a club hammer if you would like some help?

Oscar · Post by **Oscar** » Sat Aug 14, 2010 9:02 pm

The internal gaskets are on the spindle, and the external ones are in the body. The spindle and gaskets are now in the freezer for the gaskets to contract back to their proper size.

I won't be able to mount it for a couple of weeks, so we won't find out until then whether I've been successful this time or not. Fingers crossed...

Post by **mat_fenwick** » Sat Aug 14, 2010 11:37 pm

Oscar wrote:
mat_fenwick wrote:We use liquid nitrogen at work, so if you're still struggling I may be able to help...
Pop some in the post to me, would you?

I was meaning that if it's just a case of doing a spot of shrink fitting, you could post the bits to me and I could press them in...see how it goes at -18 deg C!

Oscar · Post by **Oscar** » Mon Aug 16, 2010 9:51 am

Matt that's a kind offer. I thought you were being funny, my apologies.

I may very well do that - the gaskets are not shrinking back into their grooves. I have jubilee clips on 2/3 at the moment as the Japanese site says that they need to be compressed to fit. One of them seems to be shriking slightly, the other two not really.

scarecrow · Post by **scarecrow** » Mon Aug 16, 2010 2:01 pm

This is probably stupid, but couldn't you go at it the opposite way, i.e. boil the casing in oil to expand it?

Oscar · Post by **Oscar** » Mon Aug 16, 2010 2:05 pm

scarecrow wrote:This is probably stupid, but couldn't you go at it the opposite way, i.e. boil the casing in oil to expand it?

No, the gaskets expand to get over the various ridges on the spindle, then are supposed to contract back down again. Taking their time though. Pop around if you like and I'll show you.

O

scarecrow · Post by **scarecrow** » Mon Aug 16, 2010 2:38 pm

Can't today Oscar - got things that I've been avoiding doing now needing to be done asap

Plus I'd have to ask to have a go and that's probably be the end of it!

Though photos might be good for other's like myself to see, if you have time.

Steve

rayfenwick · Post by **rayfenwick** » Tue Aug 17, 2010 11:42 pm

Oscar wrote:I won't be able to mount it for a couple of weeks

Thankfully my missus and I rarely argue.