How does this seal?

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georgia088
40C crawler
40C crawler
Posts: 11
Joined: Fri Oct 24, 2025 8:09 am

How does this seal?

Post by georgia088 » Mon Jan 19, 2026 3:31 am

Had to remove bell housing from jd450 loader to replace seal. I am in process of reassembly. In order to get bell housing off, a 90 degree fitting must be unscrewed from the transmission front cover because it goes through a hole in the bell housing to attach to the transmission front cover.

From that 90 it goes to the oil cooler by the radiator via hose/pipe.

My question is how does this fitting seal? It appears to be regular pipe threads. I can tighten it by hand, but the part that the hose clamps over the nipple must point in the correct direction to get hose to the oil cooler. If I try to tighten another turn, it gets tight, so tight that I must use either a 1-1/8 wrench or pipe wrench to turn. it feels like it’s going to break before I can get a full turn so that the nipple is headed in the right direction.

It is like the threads have bottomed out in the transmission front cover. But if I loosen to where the nipple is headed in the right direction it is barely hand tight. Can this possibly seal? As, this has quite a bit of pressure I would think.

It is part number 14 in the transmission oil cooler lines and filter (35-25) in the schematic and there is no mention of a proper way to tighten in the service manual.

Thanks.

Jim B
350 crawler
350 crawler
Posts: 2493
Joined: Sun Nov 05, 2017 11:36 am
Location: western Maine

Re: How does this seal?

Post by Jim B » Mon Jan 19, 2026 6:20 am

See your thread about this on Yesterday's Tractor for my thoughts.

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