MF 175 Drawbar bolt question

mf175s · Apr 19, 2017

We have a 1969 MF 175 diesel (LOVE it!). The other day I noticed a drip from the rear of the tra.ctor and it
was coming from one of the 4 bolts that hold the drawbar assembly to the rear of the tractor. I drained the
oil and removed the bolt. Well, one of the 4 bolt holes go all the way thru the casing, and the bolt was not
the correct one and hence the leak. Someone has 'farmer rigged' it years ago apparently with a rubber boot
and poly material, and my pulling the harrow jarred their fix loose. Is one of the holes meant to be a drain
hole? On ours, the threads are stepped, so the bottom threads are bigger than those up higher in the casing.
Is that normal or another of their 'fixes'? If not normal - any suggestions? Thanks!

Dieseltech · Apr 19, 2017

When new, those holes never went through, all four were blind holes. Someone got carried away when trying to repair the damaged holes..

mf175s · Apr 19, 2017

I appreciate the info! Thanks.

Phil Tibbetts · Apr 20, 2017

Sounds like the original hole was stripped so someone tried to drill and tap deeper and broke through into the oil sump. I would get the oil all drained out, flush the area with solvent to get as clean as possible, then get some red silicone gasket maker and put a good big bead around the shoulder of the bolt and half way up it. Then tighten the bolt back up good and let it set for a couple days to give the silicone time to set up. I've used this trick a few times and it worked. You may want to keep check of the bolt to make sure it don't loosen up again. Just my 2ents worth.

ptfarmer · Apr 20, 2017

On something like that I'd use Permatex form-a-gasket no.1 sealant, sets quick, dries hard. Less likely to shake out than silicone IMHO.

MF 175 Drawbar bolt question

mf175s

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Dieseltech

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mf175s

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Phil Tibbetts

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ptfarmer

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