John Deere 5105 Fuel Leak

[phawes]

Last year, I could not start my tractor a couple of times. My mechanic explained that there was no fuel pump between the tank and the fuel filter and it had lost prime. He advised me to leave my tractor parked aimed downhill and with a full tank. He suggested that he replace my fuel line when he gave my tractor its annual service.

This spring, there was diesel fuel on the grass below my fuel filter. I found that the starter and engine block below the fuel filter were wet with diesel fuel. However, the engine started immediately.

I thought that perhaps the fuel had dripped after having primed it last year. So, I used a mild degreaser to clean around and below the filter. A few days later, I found that the surfaces were again wet from fuel.

My mechanic has recently had heart bypass surgery and is thus unavailable. So, I decided to replace the fuel line from the tank to the filter myself. I found that it is about eight feet of 3/8 I.D. fuel hose. HOWEVER, I CANNOT SEE BEHIND THE FILTER WHERE THE SUPPLY LINE ATTACHES.

Does anyone have any advice as to how to diagnose and stop this fuel leak?

 

[Zebrafive]

Which Model 5105 do you have 5105M or other?
Can you tell if the fuel hose is wet, fuel leaking thru it? Or if the the fuel filter is leaking? Might be O-ring or water drain leaking.

JD110 posted there is a better fuel line available. Think it is made by Gates, but not sure

 

[Fossil Farm]

I have a 2002 5105 2WD. The fuel line had cracked about 4 times before I had it taken to the dealer to have it replaced. The first 2 times, the mechanic came out and was able to shorten the line and reattach it at the fuel filter. The third time was just under the clutch area. I used some connectors and hose clamps. Trouble is, there is no shutoff valve at the fuel tank in the rear. I wasn't around when the mechanic fixed it the first two times, so not sure what he had to remove to get at the connection at the fuel filter. Your dealer may be able to explain over the phone how to get to the filter connector area. Good luck.

 

[Fossil Farm]

Went out and looked at mine - the fuel line attaches just left of "D" in your photo. It attaches in underneath, about in line with "A". On my setup, nothing would need to be removed to reattach the fuel line, as it is accessible from the side.

 

[jd110]

Which Model 5105 do you have 5105M or other?
Can you tell if the fuel hose is wet, fuel leaking thru it? Or if the the fuel filter is leaking? Might be O-ring or water drain leaking.

JD110 posted there is a better fuel line available. Think it is made by Gates, but not sure

Gates does make the hose. It is marketed under the name of Barricade. There are two varieties. One is rated for up to 225 psi and the other up to 50 psi.

 

[phawes]

Thank you for your responses.

My tractor is a plain 5105 2WD, vintage circa 2002. (I bought it used.)

The picture is from a JD Technical Manual. The supply fuel line that I am trying to replace connects at 釘? The one at 泥 goes to the injection pump. Both are low pressure.

I found no wet diesel on the hoses that I could reach. There was diesel fuel on the cables leading to the starter, the starter itself, and the engine block below the fuel filter.

I have now tightened the primer pump on top of the filter and the water drain. The filter ring was already tight. I feared breaking it by trying to tighten it more.

I will need to wait a couple of days to see if these helped.