EEC = evaporative emissions control, think of the carbon canister that supposedly absorbed vapours from fuel tank and carby bowl such as on later model kingswoods, toranas etc. This info is probably not so relevant to this issue
From: [email protected] [mailto:[email protected]] On Behalf Of Nigel Baker Sent: Saturday, 28 July 2018 10:04 PM To: [email protected] Cc: Rob Hanbury; Andrew Simpson; [email protected] Subject: [DOG mailing list] Fuel Line Hi All. This is mostly for the HK36 owners in the group. I am trying to put an old job to bed. It is fuel lines and approved replacement hose. The GFA AW panel has been recommending Aeroquip FC 332 as a suitable replacement hose for aircraft operating under the Gliding Federation of Australia (thus this affects OZ aircraft). It is suitable for use with leaded and unleaded fuels, mogas and alcohol blends. It also has a reluctance to ignite and indeed stay burning preferring to smolder to a halt. It fits the bill well as a reliable replacement especially where we are aware that some OEM’s are offering replacement hose for their aircraft without a calendar life which we think unacceptable due to its enthusiasm to light up and stay lit. The problem is that the Aeroquip product as good as it is and has been recommended for more than a decade now it is only available in 1/8” size increments where we have some aircraft using fittings requiring hose size increments of 1/16”. I have some Gates hose I removed from a HK36. I am almost positive it is original from build so overdue for replacement some 20 years ago. I know the HK36 at Caboulture has had its hose replaced with like for like gates hose but I can’t identify the stuff I have. It is single cloth braid reinforced and black. It is labeled with printing on the side indicating Gates M.P.I (which means multi point injection so good for 250 PSI) it also says multifuel compatible and then PCV/EEC ( I assume the PCV means its OK for hot oil mist as in positive crankcase ventilation. The EEC I have no idea what that might mean. Nothing on the gates website looks like what I am looking at. The HK36 MM simply gives a part number “Diamond”) The H36 MM specifies MIL spec which really isn’t appropriate today with the fuels we are using. So some input from HK36 owners would be good. What I have found on the Gates site is what I think is the solution provided it passes the reluctance to burn test. That is Barricade Carburetion fuel line. We don’t need high pressure. We need a fuel line that will take ALL the variants we are faced with nowadays including E blends and this fits that bill. http://www.gatesaustralia.com.au/~/media/files/gates-au/automotive/brochures/cooling-system-and-hose-products/gates-fuel-hose-flyer--june-2018.pdf So looking for input before I progress. If it looks good I get a short bit of this hose and subdue it to the same simple tests we did on FC 332 for volatility. Cheers. Nige.
