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Constant torque hose clamps

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David X

Joined: 10 Jan 2006
Posts: 154
Location: Princeton, NJ, USA

Posted: Tue Jan 10, 2006 10:34 pm Post subject: Constant torque hose clamps



I have a Rotax 912 engine in my 601XL. One of the oil hoses will leak where it connects to the oil cooler. It's a relatively new hose. I've retightened the clamp several times, but it will leak again after a few cross country trips. I've even replaced the clamp with a wider, stainless steel clamp with an internal sleeve.

I think it's a case of differential thermal expansion - the rubber hose and the stainless steel clamp don't expand equally - which deforms the hose over time ("cold flow").

I was thinking of trying a Breeze constant torque clamp (http://www.breezeclamps.com/ct.htm) and tightening it to about 40 inch pounds.

Has anyone else run into this sort of problem with hoses and was it solved using a spring clamp?

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Zodiac 601 XL - CZAW Built - Rotax 912S
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