How do you biuld your TRF shocks?

Netmav · #1 01-03-2012

Hi guys,

I'm having some trouble getting my TRF HL shocks completely sealed. I always get some "sweating" around the rod at the bottom of the shock body.

I've tried to build my shocks with the standard Tamiya O-rings (red), Tamiya Competition O-rings (blue) and the Tamiya X-rings.
I've got three set of these shocks, but I cannot get any of them to stay completely sealed?
I use Green Slime on the O-rings when I build them.

Anybody got any tips on how to make them 100% sealed?
Or does this happen to all Tamiya TRF shocks?

Thanks.

\Martin

sosidge · #2 01-03-2012

Are you trying to completely fill the shock with oil? Because that won't work, they need some air in them, and excess oil will just get forced out of the seals.

I always built them like an Associated shock - piston down, oil to the brim but with a concave surface, screw the oiled cap on, check for even damping throughout the stroke with no more than a tiny squeak of air. I've never managed to get the bleed screws to give me the kind of shock I like.

MHeadling · #3 01-03-2012

Sorry to crash the thread, but anyone know the part number the for the o ring for the shock cap?? The one that goes around the shock body??

Maybe try the Nortech whitie o rings? available from JT models...

Netmav · #4 01-03-2012

I've always used the "Shock building guide" on trfracing.co.uk, thinking that was the best solution.
http://www.trfracing.co.uk/page_1265187551237.html (scroll down a bit)

Maybe I should mention that my shocks works and feels perfect, except for the sweating.

\Martin

sosidge · #5 01-03-2012

Quote:

Originally Posted by Netmav

I've always used the "Shock building guide" on trfracing.co.uk, thinking that was the best solution.
http://www.trfracing.co.uk/page_1265187551237.html (scroll down a bit)

Maybe I should mention that my shocks works and feels perfect, except for the sweating.

\Martin

Well, that is pretty much the opposite of the way I build my shocks, it builds a shock that has no air in it but which will suck the damper shaft back in when extended, the way I do it builds a shock that will allow the damper to rebound. But everyone has their own way, and that way is successful for a lot of people.

A little "sweating" is tolerable, most of my shocks sweat a little over a period of a couple of months. If the shock is unusable after resting for a week then that is not good.

MHeadling · #6 01-03-2012

I have found the O rings for the shock cap:

BE13- 9444361

Any ideas where I can get these??

Netmav · #7 01-03-2012

Can you let me know how you build yours in detail?
I have to do a rebuild after 4-5 meetings on mine..

Quote:

Originally Posted by sosidge

Well, that is pretty much the opposite of the way I build my shocks, it builds a shock that has no air in it but which will suck the damper shaft back in when extended, the way I do it builds a shock that will allow the damper to rebound. But everyone has their own way, and that way is successful for a lot of people.

A little "sweating" is tolerable, most of my shocks sweat a little over a period of a couple of months. If the shock is unusable after resting for a week then that is not good.

Aussie Top Force · #8 12-03-2013

oops thought this was new thread!

super gripper · #9 12-03-2013

always use associated green slime, I use the standard red O rings and my shocks never leak.

djmcnz · #10 13-03-2013

Interesting thread because I'm about to rebuild my shocks too. They've never leaked though... ever. Murphy's Law is that they will leak after this rebuild!

However I hate the bleed screw / aeration method - I can't get them "just right" for me either.

So I suspect I will dismay some when I say these are getting rebuilt with solid caps and bladders so I can adjust rebound more effectively. I'll take it up a step or two in oil weight to compensate.

Will be changing from stock red o-rings to x-rings because I have some of these floating around from a recent purchase.

Will take into consideration the various tips in this tread, thanks!

Airfixie · #11 01-03-2012

Hi sorry but my brother pretty switched on,you 100% sure theres no air inside

MHeadling · #12 01-03-2012

Thanks Netnav, is the service from Vellrip good??

Netmav · #13 01-03-2012

I've got nothing but good things to say about their service.
I've bought from them a few times, and never had any problems.
Shipping's quite quick as well.

They might not be the cheapest, but they've got a lot of "hard to get" items.

Quote:

Originally Posted by MHeadling

Thanks Netnav, is the service from Vellrip good??