New hoses and fittings for my 002a

[87cr250r]

Just watch out for NBR rubber. It has a very short life on engines. This does not include HNBR which is second to Viton for longevity.

 

[rickf]

Ok, opinion on this hose at 4.50 ft.. Good from -40F t0 275F. SAE J30R7.

 

[87cr250r]

That will work for supply lines. I would recommend SAE 30R10 hose for the initial length of return line.

Avoid worm drive hose clamps of you can. Use non-perforated or lined clamps if you must. The spring clamps are ideal Oetiker pinch clamps are great if you don't need them to be removable. The Oetiker clamps and install tools are cheap.

 

[rickf]

Here is what I am going with along with the related 3/8 pipe to AN-6 fittings.
I find it hard to believe that these sets have return fuel anywhere near 300 degrees. I plan on checking the temp of mine the next time I have it running. Probably end of next week. If I am wrong I will come back and admit it. This hose will outlast me in this application but if it does not the replacement is simple, no sourcing special military hoses.
Stainless Steel Braided Racing Hose

This synthetic nitrile rubber racing hose is compatible with the oils, fuels* and coolants normally found in race cars. It withstands high temperatures and its stainless steel cover resists abrasion and corrosion. The continuous temperature rating is -55°F to 300°F. Sold in 1 foot increments.

Here is a link to the source of this info.

Stainless Steel Braided Racing Hose - Pegasus Auto Racing Supplies

Our stainless-braided racing hose has a synthetic nitrile rubber core, compatible with the lubricants and coolants used in race cars. The tough outer braid resists abrasion and corrosion.

www.pegasusautoracing.com

 

[Guyfang]

I don't think you will find return fuel with anywhere near this temperature. Not even on a D424 Turbine gen set.

 

[87cr250r]

I'm not saying the return fuel will approach 300 degrees. I'm saying that 200° is possible. That's too close to the maximum rating of a 212° rated hose and you should expect short life expectancy in that case. There are 3 types of runners oil hoses are constructed from NBR, HNBR, and FKM. NBR hoses are not well suited for on engine and engine return line applications. The others are well suited. The challenge is that outside of OEM applications, NBR is the most common hose material. And when it fails everybody blames Chinese rubber instead of incorrect specification.

Stainless steel braided hoses presents a whole new set of challenges if it's exposed to chlorides or salt. I don't think that will be much of an issue on a generator.

 

[edgephoto]

Here is what I am going with along with the related 3/8 pipe to AN-6 fittings.
I find it hard to believe that these sets have return fuel anywhere near 300 degrees. I plan on checking the temp of mine the next time I have it running. Probably end of next week. If I am wrong I will come back and admit it. This hose will outlast me in this application but if it does not the replacement is simple, no sourcing special military hoses.
Stainless Steel Braided Racing Hose

This synthetic nitrile rubber racing hose is compatible with the oils, fuels* and coolants normally found in race cars. It withstands high temperatures and its stainless steel cover resists abrasion and corrosion. The continuous temperature rating is -55°F to 300°F. Sold in 1 foot increments.

Here is a link to the source of this info.

Stainless Steel Braided Racing Hose - Pegasus Auto Racing Supplies

Our stainless-braided racing hose has a synthetic nitrile rubber core, compatible with the lubricants and coolants used in race cars. The tough outer braid resists abrasion and corrosion.

www.pegasusautoracing.com

I have used plenty of that style on hose on race cars I have built over the years. I have never seen it available in a -5 size, including your link. I would have to replace all the fittings. I was hoping to just replace the hose and reuse fittings. If I have to buy fittings then it kind of wipes out cost savings of the hose. Although it would be easier to replace a hose later on if I went with the commonly available hose.

 

[rickf]

You can get the fittings in -5 through other sources but I want to with standard sizes. -6 is 3/8 internal which is good for fuel line and way more than needed for these small gensets. But I do agree that the fittings raises the price. But as you have found out, that special hose comes at a special price. This hose is rated at 300 degrees so I am not worried. I checked my Cummins 24 valve today after a 2 hour run on the highway and it was 130 degrees. And that is with the infamous Bosch VP44 which is known to run hot.

 

[87cr250r]

There is an active push to obsolete -5 fittings. I used to use a lot of field assembled fittings and the -4 were very fragile. You could break them by bumping into them so I replaced them all with -5. Now -5 is rare. I suggest using -6 for everything, even if it was previously -4 if your using field assembled fittings. -4 Push Lok and crimp are fine.

 

[edgephoto]

Anybody know how much hose it takes for one MEP-002A generator?

 

[Tinstar]

-5 is still used in Aviation.
Fittings and hose still available.
Usually it’s a specially lined hose. Teflon, etc.
Just be prepared to pay.
Especially if you include fire-sleeve.

Feet of hose per set?
Good question.
I don’t know
Without looking directly at my 002A, Probably a 10 foot roll would work. Maybe up to 11-12?
Just a guess and I’m not sure if it’s in the TM
Probably just a “cut to length” note

 

[Guyfang]

I picked this hose, Item #4, for an example. When you look at the TM, it shows you the hose. Look at the information page, and there is no NSN. That's because its not a stocked item. You are supposed to make it. The hose material itself is Item #6. Look at item number #6 in the info page and it shows you, all the way to the right, It says, Unit of measure is Feet, and that the amount oh hose FOR THIS figure is 1.2 Feet. Thats because there is, Three hoses in that figure. The next column shows you how much of that hose is needed for the whole gen set. 32 feet. How can that be?? 32 feet?? Well, if you go back a figure, you will see the Aux fuel line, (the same size hose). And if you look at the info for the hose, you see that the hose is 25 feet long. 32-25= 7 Feet. So you now know that 7 feet of that size hose is need to replace all of that size hose on that gen set. The TM is your best friend.

 

[rickf]

Amazing! I thought I pretty much understood the manuals until I met you. LOL. Then again, I was an Airborne machine gunner. Not really a call for me in the manuals at that time. Other than instructions on how to return your parachute if it did not function correctly (open) and the paperwork you would need to fill out.

 

[Mullaney]

Amazing! I thought I pretty much understood the manuals until I met you. LOL. Then again, I was an Airborne machine gunner. Not really a call for me in the manuals at that time. Other than instructions on how to return your parachute if it did not function correctly (open) and the paperwork you would need to fill out.

.
Well... I am guessing that if your parachute doesn't open - YOU don't have to do the paperwork.

 

[rickf]

You had a reserve chute but you HAD to remember to cut the lines on the failed chute before opening the reserve. Otherwise they just tangled together and you were in for a real hard landing. When jumping out at 1500 feet on a static line you only had seconds to make all that happen and have the reserve fully deploy. People have survived those failures but thankfully the chutes were quite dependable. The guys (and gals) packing the chutes were robots in human form. Watching them work was amazing.

 

[2Pbfeet]

I think it takes a very special person to fold and pack chutes well. You know that somebody's life is on the line when it gets used.

I have to admit reading that there is requires paperwork involved in a non-functional chute incident is on the one hand so DOD, and on the other, of course. Still it gave me a chuckle. Yes, there isn't much time if you have to bail at 1,500', have the main fail, have to cut it free, and then get the reserve out to deploy in time. No time at all, but way better than not getting the reserve out.

It was nice to see that the ejectors and chutes worked for all six airmen today.

All the best, 2PbFeet

 

[rickf]

Today? I guess I am missing something. Probably because I do not follow news anymore since none of it, red or blue, is factual.

 

[rickf]

Ok, Jets shot down, got it. But I thought the F-15 was so advanced that it was about impossible to shoot them down? Let alone three of them. Do you think Kuwait will reimburse us the billions lost?

 

[Mullaney]

Ok, Jets shot down, got it. But I thought the F-15 was so advanced that it was about impossible to shoot them down? Let alone three of them. Do you think Kuwait will reimburse us the billions lost?

.
Yep. Broke their record.
Had not been shot down until this "friendly fire" incident

 

[rickf]

Probably has something to do with the fact it is a US weapons system used against us. Something the really think about.