kenscabs

I have a 1715 I purchased last October and haven't had much time to work with it but the other day I moved it from a dirt area to a concrete pad and within a few minutes there was a large puddle under it. Here's the mysterious part, under the transmission, right behind the motor pan, right above the shaft that drives the front wheels is a small raised boss in the casting that is chipped, that reveals a small, approx. 1/8" hole and of course fluid dripping out. What is this hole/boss for?

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Ken

kenscabs

Trying to add a pic.

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Ken

urednecku

I'm not sure, but wanted to tell ya 'welcome to the forum'.
Somebody should be by soon that might have some idea of what your up against. Good luck!

kenscabs

Thanks for the welcome. I've wrenched on cars and trucks my whole life but driving and working on even a compact tractor like the NH is a new experience. Not better, not worse, just different.

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Ken

Live Oak

Welcome to Tractor Forum Ken! The pictures shows this leak has been leaking for a long time.

I really cannot make an accurate assessment of where or what could be leaking since so much of the area around the drip is wet with oil.

By chance can you spray the area down with engine degreaser and pressure wash it good? This would clean everything up real nice and make a clean slate to work from with respect to difinitively identifying the specific area the leak is originating from.

kenscabs

Take a look at the red circled area. This the boss area that’s raised, but why would it have such a small hole (1/8")? What I'm looking for is someone with a 1700 series NH to take a look under they’re NH and see what that area looks like. Thx.

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Ken

Live Oak

I saw the oil drip on the boss area the first look. There is oil all over the place. The drip on the boss area may or may not be from that area. The small hole in the boss area although I cannot be sure is likely an oil/fluid weep oil to allow fluid to escape the bellhousing area.

If the oil is indeed coming from the hole in the boss, you may have a seal leaking inside the bellhousing. The oil looks pretty clean so my guess would be transmission oil.

kenscabs

The fluid is definitely coming from the hole. I reached the same conclusion that it's a seal. For a while the tractor was parked pointing downhill which if there's a leaking seal on the input shaft to the trans it would leak past the input shaft seal and collect in the clutch/bell housing. I'm going to keep it on a flat surface and top off the fluid and see to what extent it's leaking. Thanks for your input.

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Ken

Cannuck-elhead

It sure looks like the weep hole in the bottom of the bell housing.

I'm not sure if you have a loader on your machine or not, but just ahead of the brake pedals on the right side (from the operators seat) of the transmission there should be a black rubber access port or 'hand hole' for adjusting the clutch. It would be in the center of the 3 bolt holes for the rear of the loader mounting bosses. Most of those small Ford/New Holland machines had them.

Popping this cover off will give you (depending on a loader frame being in the way or not) a decent view inside there without having to split the machine in half.

By the sounds of it though it's the input shaft seal that's leaking the transmission's oil into the bell housing.

Be careful it doesn't wet the clutch linings or you'll be into an even bigger job if that's what it is.