Mep-803a fuel leak

[chilbun28]

Hi, I have a fuel leak on at least one line. It looks like the return line is real wet and needs replacing. There is another line that's wet as well, not sure what hose this is. It goes up to a metal cylinder maybe a solenoid. Any idea on replacement hoses?

 

[Ray70]

So that line you are pointing to is an oil line feeding your oil pressure sensors.
You can get new lines custom made at most NAPA stores as well as places on-line like www.Discounthydraulichose.com
I believe that line is a -4AN / 1/4" JIC female swivel on both ends.
The return line is 3.5mm cloth covered Continental diesel return hose, available on-line at tons of places.
You can also get 1/8" Gates fuel hose from a local parts store, but be warned, the 1/8" is very difficult to get onto the fittings without wrecking your fingers! @Light in the Dark probably knows how I figured that out.... my thumb knuckle may never be the same!
If time permits get the 3.5mm stuff, it's 10x easier to work with.
5/32" would work too, but make sure it's fuel / oil rated and not vacuum line. The diesel will quickly swell up and soften some brands of vacuum hose.

 

[chilbun28]

So I can use the fittings on the old hoses or I need to get new fittings as well?

 

[Ray70]

Fittings on the oil hose are crimped on, you need to have a new hose assembly made up.
You could cut the sleeves off the fittings and make up your own hose with 1/4" hose and clamps, but I would just buy a custom made assembly.
It will probably be about $20 plus shipping.
The T-fittings on the3.5mm return line are just plastic and reusable.

 

[Light in the Dark]

So that line you are pointing to is an oil line feeding your oil pressure sensors.
You can get new lines custom made at most NAPA stores as well as places on-line like www.Discounthydraulichose.com
I believe that line is a -4AN / 1/4" JIC female swivel on both ends.
The return line is 3.5mm cloth covered Continental diesel return hose, available on-line at tons of places.
You can also get 1/8" Gates fuel hose from a local parts store, but be warned, the 1/8" is very difficult to get onto the fittings without wrecking your fingers! @Light in the Dark probably knows how I figured that out.... my thumb knuckle may never be the same!
If time permits get the 3.5mm stuff, it's 10x easier to work with.
5/32" would work too, but make sure it's fuel / oil rated and not vacuum line. The diesel will quickly swell up and soften some brands of vacuum hose.

I use that stuff on every machine! All it takes is some motor oil (normally used from the oil change within arms reach from working on said machine) on the barb ends and they go together relatively easily. Definitely not as loose as the leaky Continental, but much more readily available.

 

[chilbun28]

So if I go with the gates fuel line to solve my diesel return line leak, i need to go with the 1/8" hose or 1/4" hose.
Also, regular gates fuel line or some special line for diesel or higher pressure? Sorry for being redundant, I've been up and going since 1AM.....

 

[Light in the Dark]

Take a length measurement (or consult the TMs), but Im almost certain that line you are pointing to, is the same as the line that goes from the separator base, over to the canister fuel filter body.

https://www.surpluscenter.com/Hydra...Hose-Assembly-5800-PSI-NRP-Jones-920-2218.axd

And the fuel lines from the rigid fuel line to the metering pumps is the 1/4", the return line is the 1/8" https://www.oreillyauto.com/detail/...5/gates-safety-stripe-ii-fuel-hose/gatr/27000 (the return line)

 

[dav5]

Hi, I have a fuel leak on at least one line. It looks like the return line is real wet and needs replacing. There is another line that's wet as well, not sure what hose this is. It goes up to a metal cylinder maybe a solenoid. Any idea on replacement hoses?View attachment 889699
View attachment 889700
View attachment 889701

That oil line was only finger tight on my 15 original hour 803A. I just had to tighten it.

 

[FarmingSmallKubota]

This is what i buy for the return lines. Since it is red i can identify which ones i have changed.

3.5mm Diesel Fuel Injector Return Line Hose Made in Italy 1 meter - Best Quality | eBay

Premium OEM Quality - Made in Italy. Quality Parts at Competitive Prices. Item Condition: New. ⚙Applications. ⚙Specifications.

www.ebay.com

3.5mm Diesel Fuel Injector Return Line Hose Made in Italy
Also just be patient if your going to replace return lines as you will be removing the top of the unit. lots of bolts .

 

[chilbun28]

And the fittings everywhere the fuel line terminates, is it all hose barb fittings where I can cut the old hose off the fittings and push the new hose onto them, or is the fittings pressed fittings where I need to get new fittings with the new hoses? Trying to get my material list together. I'll be going out to the farm Tuesday morning to do the replacement and want to have everything I need. Thanks

 

[Light in the Dark]

Barb fittings at the beginning and the end of the return line run are metal, no replacement needed. The ones at the injector returns are 1/8" plastic vacuum tees. You may be able to reuse what you have, but it's cheap enough to pluck and chuck.

 

[Light in the Dark]

If you have very small zip ties, bring them along too. I often will use them on all the barb fittings for extra security.

 

[FarmingSmallKubota]

10-32X1/2 Slotted Hex Washer Head Machine Screws 18-8 Stainless Steel (50 Pcs)
#10-32 Stainless Steel Locknuts with External-Tooth Lock Washer,50-Pieces,Kep Nut

10-32x3/4 Stainless Steel Slotted Hex Washer Head Machine Screws 18-8

Flat Washer SAE 18-8 Stainless Steel
your going to need these as well, stainless is not required but i do not like rust

 

[chilbun28]

Appreciate the help. Thanks! -Chuck