John Deere 4300 complete rebuild

[johndeere4300]

Originally Posted by dfkrug

Anyway, here are more pix of the damaged hose, and where it gets pinched.
The first photo is what I posted earlier, with a large hole and split. Installed,
the hole is pretty much closed up, as you can see in the 2nd photo with
my hand pushing down on it. With some dirt on it, the split and hole are
hardly visible.

The 3rd and 4th pix illustrate the 3 damaged areas, due to pressure from
the fuel tank, fuel overflow hose, and the breather on top of the valve
cover. 2 of the 3 damaged areas have not penetrated, but quite a bit
of rubber has eroded away.

Yea, i can see where they put pressure on the hose.... This is something that really needs to be checked very often.

I think JD really has a bad setup on this... Yesterday when i looked at mine from the fuel filter side, the tank isn't touching the hose.. and i wonder why it was on yours.

Next week we could get a lot of rain, and i plan to take my filter housing out and see if i can check on the hose better... and also look for any dirt buildup around the hose.

Thanks for posting the pictures!

[dfkrug]

Here is a photo with a new hose. There seems to be enough room in
there between where the tanks goes, and the valve cover.....as long
as there is nothing else in there.

I was hoping to reuse this filter housing, but it looks like I will be
ordering a new one.

[johndeere4300]

Originally Posted by dfkrug

Here is a photo with a new hose. There seems to be enough room in
there between where the tanks goes, and the valve cover.....as long
as there is nothing else in there.

I was hoping to reuse this filter housing, but it looks like I will be
ordering a new one.

So are you going to run the 'overflow hose' a different way ?

Does the new hose feel stiff in the middle of it ?.... I wonder if some kind of "wrap" could be put around the 'new hose' to protect it more.... Like the kind of wrap that's around hydraulic hoses.

I haven't seen a tractor like mine in my area with the 'vertical intake' on it... and when its routed out the hood, I would assume that it will lift off before the hood can be raised.... I have seen the vertical exhaust (different from mine) coming straight up through the hood, and they have to lift it off before the hood is raised.

(sorry for asking all the questions)

Last night was the first time that i checked out your other projects, and you did a great job on all of them!

[dfkrug]

Originally Posted by johndeere4300

So are you going to run the 'overflow hose' a different way ?

Does the new hose feel stiff in the middle of it ?.... I wonder if some kind of "wrap" could be put around the 'new hose' to protect it more.... Like the kind of wrap that's around hydraulic hoses.

An overflow hose is not necessary, so I will delete mine. The connection
can be plugged up and the overflow catch basin can still hold some fuel.
How much are you going to spill after all? Of course, if you read about
some of my other projects, I have long since given up lifting 5-gallon
fuel cans to fill my tractors. When you do that, spilling fuel is easy.

The new hose I bought is pretty squishy. If you do pull yours out, you
might consider gluing a rubber patch on the parts of it that rub against
the valve cover and tank. If you went with an intake system that went
thru the top of your hood, you would have to make it easily detachable to
get the hood open. It may be better to do it like your exhaust, where it
exits the side of the hood.

[Wayne_H]

Originally Posted by johndeere4300

Wayne,

When you done the test and the hose on top collapsed...Did you look at the hose under the tank & see if it collapsed too ?

Yea the 4300 that dfkrug is rebuilding was really abused, and yes its in good hands now & should be a better tractor when its finished.

You would think these rental yards would do more maintenance on their equipment.

Bill: Let me run the test again and see, but frankly its real hard to see the hose under the tank....

Wayne

[johndeere4300]

Originally Posted by dfkrug

An overflow hose is not necessary, so I will delete mine. The connection
can be plugged up and the overflow catch basin can still hold some fuel.
How much are you going to spill after all? Of course, if you read about
some of my other projects, I have long since given up lifting 5-gallon
fuel cans to fill my tractors. When you do that, spilling fuel is easy.

The new hose I bought is pretty squishy. If you do pull yours out, you
might consider gluing a rubber patch on the parts of it that rub against
the valve cover and tank.

I quite using 5-gallon cans also....I have a 25-gallon plastic drum.

I will probably take out my over flow hose also... With it out it will be easier to wash out in the dust in that area.

I would have thought the new hose would be stiffer than that.... I just went back and looked at the picture i posted of the hose under the tank... JD should have made the tank so there would be more open space in that area.

When i take mine out i will put a patch on some of the parts....This is an important thing that needs to be checked on very often, since it caused engine failure on your rebuild.

Thanks for the advice!

Originally Posted by Wayne_H

Bill: Let me run the test again and see, but frankly its real hard to see the hose under the tank....

Wayne

I looked at the hose on the fuel-filter side. On the other side i could not see the hose at all.

I put a trouble light on the other side so i could take the pictures.

(mjncad, Have you checked yours out ??)

[mjncad]

Originally Posted by johndeere4300

(mjncad, Have you checked yours out ??)

Not yet, I need to. Thanks for the reminder. The soonest I'll be able to get to it is Tuesday or Wednesday.

[banjodunn]

G'day what a great thread and i hope everyone looks at it from time to time i have been following this from the start and am very impressed as to the detail you are going to. As for trying to find a cracked hoes or leaking joint or manifold the best thing is ether spray it around the suspect area at idle and the revs will pick up i do not like the idea of blocking the intake to the point of hose collapse as i have personally seen manifold gaskets sucked in doing this. Anyhow keep up the good work and will be looking forward to the day she turns a wheel in anger


Jon

[dfkrug]

Originally Posted by banjodunn

As for trying to find a cracked hoes or leaking joint or manifold the best thing is ether spray it around the suspect area at idle and the revs will pick up

Yeh, fair dinkum, Jon. Good suggestion. For carbs on gas engines, I use
Gumout to find vacuum leaks. Ether or "starting fluid" is even better.

[Wayne_H]

OK, DKRUG, you motivated me to do some more looking at my 4400. I assume the tractors are extremely similar, even down to the engines. It took about five minutes for me to inspect the hose that goes from the air filter to the intake manifold. First, I removed the coolant overflow tank and got that out of the way. (one bolt). Second I too the two bolts off of the air filter hosing. You have to remove the coolant overflow to get at them. Then, I loosened the hose clamp that is closest to the air filter on the hose the goes to the intake. Then I took the filter housing off and looked around. There are two possible hoses that could be an issue. One is the overflow for when you put two much fuel in and it spills in the bowl area around the cap. That hose drains to the ground. There is a second hose near the air intake hose that is part of the closed loop fuel system. It is connected to a "T" fitting near the IP. None of these hoses touch or are touching my air intake manifold hose. BUT, but if somebody misrouted them you might have a problem...

Here are some pictures. The first is the air filter housing with the overflow moved to the right some. Now if you take a look at the overflow hose that is routed close to the water hose, if you put that on the wrong side of the filter housing bracket you will have contact.

The last picture shows clearnace between both hoses, but not much! If the gas tank moves or is somehow pushed down, it will make contact. There was no/no contact or even appearance of wear on my manifold air intake hose.

Wow, I'll sleep better tonight now. If I could only figure out how to put this back together....

Wayne