Need perkins prima M50 fuel line replacement???

[georgetheleo]

Have this engine in my Beneteau 1990 41S5. It connects with a flare nut to the top of the injector pump and runs down about 36" long where it connects to about 1/4 copper line which then runs to the fuel tank. Its not a engine part I dont think or I cant find it. It leaks and needs replaced.

 

[Ralph Johnstone]

You're going to have to post several, well laid out pictures because, as you have verbally described this, the arrangement makes no sense.

 

[jssailem]

Check here are these the parts you seek.

Fuel Injection line set Perkins Prima M50

Perkins Prima M50 Fuel Injection line set

www.shipoutletstore.com

 

[jssailem]

These are the high pressure lines from the HP pump to the injectors.

 

[georgetheleo]

These are the high pressure lines from the HP pump to the injectors.

yES THEY ARE OT THE FUEL "RETURN TO TANK" LINE i NEED.

 

[georgetheleo]

Right! They are not what I need which is the start of the fuel return line.

 

[jssailem]

The fuel return line is a low pressure line. It does not need to be of the same material. I would remove the line and take it to a shop that makes up hydraulic lines for trucks and heavy equipment. They can either fix the fittings that are giving you trouble or make a new fuel return line to match the one you have. Probably do so at a cost savings over searching for a marine store or OEM part.

 

[georgetheleo]

I tried that-took old one to Hydraulic shop. They said no fittings they have match the fittings on each end. Also tried a huge hose shop. They said same thing ! Next Im taking it to a local fuel injection shop thinking that most fuel injector pumps are made by Bosch and that they will have the proper metric flare copper fittings needed to attach to threaded orifice on the fuel injector pump.

 

[georgetheleo]

I tried that-took old one to Hydraulic shop. They said no fittings they have match the fittings on each end. Also tried a huge hose shop. They said same thing ! Next Im taking it to a local fuel injection shop thinking that most fuel injector pumps are made by Bosch and that they will have the proper metric flare copper fittings needed to attach to threaded orifice on the fuel injector pump.

 

[Mechone]

Picture is worth a thousand words, you can buy steel tubing in fact stainless tubing , and buy a flaring tool off amazon and reuse the original fittings. Tubing and tool both on amazon

 

[Ralph Johnstone]

Picture is worth a thousand words,

I'd say that times ten. If you can figure out how to put that statement into a picture, you'd be famous.

It leaks and needs replaced.

You've got what I'd say is a major inconvenience requiring continuous clean up and enduring the smell of diesel fuel throughout your boat.

So far :

- you don't have a shop manual to identify the part.
- you've been to a hydraulic shop and they don't have the fittings
- you've been to a huge hose shop and they said the same thing.
- no one with a Perkins Prima M50 has replied to your post.

This site is crawling with mechanics and people with extensive engine experience who have the knowledge to solve your problem, but:

DON'T HAVE YOUR ENGINE

Send a picture. Put forward some effort to save yourself. As we tell everyone who babbles incoherently about their problem but lacks the ambition to include a picture "Help us to help you."

 

[georgetheleo]

I have been informed by Perkins that it is not a part . All customers make their own "bleed off pipe. " as they call it.

 

[Ralph Johnstone]

OMG. And a simple picture at post #2 would have solved this problem.

I give up.

 

[georgetheleo]

I have now been to 3 hydraulic hose shops, a goodyear/parker shop, and a Fuel injection shop. None have or can ID the brass hose fittings that screw into the nut attached to the fuel injector pump and the copper tubie line on the other end. One Perkins parts supplier said it might be perkins Part No. k441af01 but it hasnt been made for 27 years. Its now leaking at the crimp space on the lower end fitting. Connection at the fuel injector pump is not current leaking.

 

[dlochner]

Perkins was originally a British diesel. It is now owned by Caterpillar. The threads on the fittings are likely British Standard Thread. There are 2 basic types, straight and tapered.

Fittings with British threads are hard to find. I have had some luck at McMaster-Carr. You may have to replumb and put new fittings on both the hose and tank. Since there are no photos of the hose in place or the places it attaches, it is impossible to tell.

I'm not surprised that those hoses leak.

 

[jssailem]

Ok.
If I understand this, based on the image you choose to provide, the part mentioned is the fitting (Part No. k441af01) is on the end of the fuel hose. That is consistent with the Perkins parts listing on line. The image looks like someone took the original fuel line, cut it into two short pieces preserving the ends that fit into parts on the engine, and plumbed a hose in between. Is that hose leaking? Are the stubs decaying and leaking?

Where exactly to you believe the leak is coming from? I would suspect your modified hose is at fault.

It is also possible that the fuel is leaking up the threads of the fitting as suggested by Dave.

Firstly I would identify the leak location. If it is on the pump body, that is a more difficult issue. If it is the hose fitting, have you tried to swap the threaded ends to see if the leak moves away from the pump? It is rare that the leak is on the threaded portion. If it is then some plumbers sealant could resolve that issue.

An image of the pump where the hose fits the pump would be remarkable.

Options:

• Keep searching for a fitting
• Get a new pump with new fittings.
• try a new hose jury rigged like the one you show in today's image
• have the pump drilled out and a new threaded connection installed that will fit with accessible brass fittings.
• Try using plumbers sealant to plug up the threads on the fuel fitting. DO not let the sealant get into the fuel lines.
• throw up your hand in horror and go out and buy a newer boat.
• replace the engine with a new fangled electric engine and be the hero of the electric powered boat in your Marina.

Good luck

 

[georgetheleo]

Dear John ,Thanks for the response. Your first paragraph is correct. Its a new hose fastened to the old fittings using 4inches of old hose connected to new hose with ss clamps and a brass barbed 1/4 hose mender. Now the old hose part leaks at the swaged old fitting! at the lower end. Probably because all the on and off handling disturbed the 30 + Year Old connection. Now Im considering 'harvesting' the old fitting --- then trying to clamp the inner brass sleve to the new hose. Cutting the swaged part off with a lil hacksaw

 

[georgetheleo]

Perkins was originally a British diesel. It is now owned by Caterpillar. The threads on the fittings are likely British Standard Thread. There are 2 basic types, straight and tapered.

Fittings with British threads are hard to find. I have had some luck at McMaster-Carr. You may have to replumb and put new fittings on both the hose and tank. Since there are no photos of the hose in place or the places it attaches, it is impossible to tell.

I'm not surprised that those hoses leak.

McMasterCarr has "straight adapters,hosexBSPPmale threaded pipe size6mm hose 1/2 inch pipe in 316 ss" for $58.55 each These look like the fittings but use clamps and are not brass but 316ss.

 

[All U Get]

Try Trans Atlantic Diesel, they are good with Perkins parts.

 

[georgetheleo]

parts4engines in the uk confirmed that the fitting part number k441af01 is correct. They do not handle them -but refiered me to a perkins OE dealer in UK called Diperk Perkins email contact parts@diperk.co.uk stay tuned merry meerry