Roll bars?

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Aug 21, 2018 | 07:57 PM

Don-T

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Joined: Apr 2013

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From: Renfrew, PA

Roll bars?

Offhand, does anyone know what triggers the ersatz roll bars to pop up behind the seats? Are they actuated by hydraulics, air, explosives, or what?

Aug 21, 2018 | 08:46 PM

jahummer

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From: Florida

I believe a combination of pyro and springs.

Aug 21, 2018 | 08:58 PM

apost8n8

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Joined: Jan 2013

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From: gulf breeze, fl

There's a **** ton of warning stickers on them. Apparently its bad if you drop it. The back seat panels are easy to pop off and you can take a look.

Aug 21, 2018 | 09:21 PM

Stuart S

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Joined: Aug 2010

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From: Atlanta suburbs

Part of the process of installing WhiteXKR's remote top kit is to remove and reinstall both roll bar assemblies. It's not difficult, and I'm pretty sure that everyone survived.

Aug 21, 2018 | 10:36 PM

Cee Jay

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From: Kaysville, Utah, US

Quote:

Originally Posted by Stuart S

Part of the process of installing WhiteXKR's remote top kit is to remove and reinstall both roll bar assemblies. It's not difficult, and I'm pretty sure that everyone survived.

I only remember doing the Driver (Left) side one, but that doesn't mean that I didn't do both. I'm kind of a lunatic these days for remembering things.

Aug 22, 2018 | 12:25 AM

kj07xk

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From: Naperville, Illinois USA

Yeah, I only removed the left side one to put in the remote top controller. Was surprised to look inside and see it was a spring loaded mechanism. Has an electrical trigger, but don’t know if its a relay or pyro released. Looks like its a ‘one time use only’ device, don’t think it can be recocked.

Aug 22, 2018 | 07:52 AM

Stuart S

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Joined: Aug 2010

Posts: 10,107

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From: Atlanta suburbs

Quote:

Originally Posted by Cee Jay

I only remember doing the Driver (Left) side one, but that doesn't mean that I didn't do both. I'm kind of a lunatic these days for remembering things.

You're probably right. I thought I R&R'd both sides, but that could be because it took me a long time to get it done.

But what do I know? I don't remember what I had for breakfast 3 days ago.

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Aug 22, 2018 | 06:51 PM

hafren

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Joined: Sep 2014

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From: Dayton, Ohio USA

Quote:

Originally Posted by Don-T

Offhand, does anyone know what triggers the ersatz roll bars to pop up behind the seats? Are they actuated by hydraulics, air, explosives, or what?

The roll over protection system fitted to the convertible vehicle comprises two roll over protection hoops located behind the rear seat. The roll over protection system is controlled by the RCM (Restraints control module). The RCM has an internal roll over sensor which triggers the pyrotechnic latches that hold the roll over protection hoops in place. The roll over protection system hoops are located behind the rear seat underneath the tonneau cover. The tonneau cover has two hatches set into it to allow the hoops to break through once triggered. The hoops are spring loaded and held in place by a pyrotechnic latch. The latch is fired in response to a trigger from the RCM. Once fired the latch opens and the hoops are released. As the hoops move upwards a ratchet in the body of the hoops locks into place and prevents the hoops from being forced back down by the weight of the vehicle. Once deployed the hoops cannot be re-set and should be replaced with new components. The hoops have a small pin mounted on top which breaks the rear window if the convertible top is up. This allows clear passage for the roll over protection hoops to operate.

For other informative information look at the how-to sticky https://www.jaguarforums.com/forum/x...k-links-20091/ post #3