hoses 5 yr changeout

dick seiders · #1 08-28-2015, 01:25 PM

Would appreciate if someone out there would provide info on the topic that is brief, concise, and complete. Call it a hose change info kit if you will. If one is created it will save all of us at the 5 yr change , and those down the road a ton of research. for ex:

Oil hoses are vans supplied and good for 10 yrs.
Fuel line hoses are Rotax? Are they supplied by Vans, Rotax, and how do they compare to alternative teflon stainless hose fplks and what is the approx. diff in cost?
Engine water coolant hoses I presume are Rotax supplied?
Radiator coolant hoses come from where? There are no VA nos so not Van's?
Hose removal tool from Amazon should be part of this as well.
Any other necessary info as well.

I would certainly appreciate a primer on this and I suspect the many who are coming up on it would as well. Many thanks.
dick seiders 120093

Sink · #2 08-29-2015, 12:53 PM

Hi MMiller,

I believe the 81mm comp tube is part 956-391. Is this the number you eventually got?
The old part number used to be 956-141.

The 66mm tube is 956-143.

dick seiders · #3 08-30-2015, 11:08 AM

MMiller,

Many thanks for the spreadsheet with the necessary info to make the change-out of the hoses. As I work my way thru the conversion I will post any unexpected issues if they arise. Your efforts have saved a bunch of flyers a lot of unnecessary hunting and grinding it out. I don't see how having to do that that makes any sense when the info has already been acquired and shared by forward thinkers like you.
Thanks again.
dick seiders 120093

penguin · #4 08-31-2015, 06:01 AM

I believe that Rotax requires all rubber components on the engine to be replaced every 5 years in their maintenance manual - but with an experimental aircraft that is only for info. Teflon hoses have no life according to Aeroquip, so replacing the rubber fuel & oil hose with 666 hose (or similar) is worthwhile although expensive. Silicone coolant hoses (typically blue) have a similar long life. If you have a oil thermostat the hose list is significantly different.

dick seiders · #5 09-11-2015, 09:38 AM

M Miller, Leaf no longer offering the 11mm dia hose part no 956141 now supplying the 956143 in it's place. No one Leaf, CPS, or Lockwood is offering any 11mm hose. I suppose the Rotax people think the 12mm is close enough?

Second question is your list shows 874911 carb fuel line from Rotax. I am under the impression all fuel lines are to be replaced with 10 year Teflon lined hose like by someone like TSF for example?

Third question is why does VA216 show up as 10 year hose? I was under the impression that Van's 10 year lines as originally supplied were oil lines only?

appreciate your feedback. Thanks.
dick seiders 120093

TS Flightlines · #6 09-11-2015, 09:56 AM

Vans 'may' have changed the VA216 to teflon; not sure about that, since we make all of ours from teflon.
Tom

dick seiders · #7 09-11-2015, 10:22 AM

Tom,
Maybe, but I just looked at the plans and a change to TSF fuel system requires these lines be replaced anyway as they have banjo fittings and won't fit the new setup.
dick seiders

TS Flightlines · #8 09-11-2015, 12:13 PM

When we designed the Rotax package for the RV12, we took in consideration all the fuel hoses. Thats why we made it a package.
Tom

RFSchaller · #9 09-11-2015, 08:46 PM

Seems like a lot of over-thinking. 11mm is 1/2". I haven't done the numbers, but I recall the ROTAX course instructor saying the coolant hoses are 5/8". Why not just go to Auto Zone and buy replacement hose if you are an ELSA?

Sink · #10 09-11-2015, 10:24 PM

13mm is 1/2" which is what most use on the oil hoses. Each Rotax service center uses a different hose for the 13mm (1/2") oil hose. The large coolant hoses are 25mm (1") and the Rotax supplied coolant hoses are 17mm of which there is no good substitute in US hose size and only one company in the US even makes the hose and only for Rotax.

11mm = .43"
12mm = .47"
13mm = .51" oil hose

When buying oil hose you need to make sure it is rated for high temp and pressure.
Fuel hose needs be be rated for ethanol which almost all fuel hose is any more.
Coolant hose can have different temp specs so make sure you review those specs before buying. Gates (Green Stripe) and Dayco do make some acceptable 1" coolant hose.
Gates Barricade hose for fuel is good hose and is well rated for any ethanol use. Wurth fuel hose is another good hose.

I believe Lockwood sells Aeroquip hose for fuel and oil and CPS sells Parker hose for the oil.