Massey 65 Perkins rear main

Cueballtech · Mar 13, 2017

Ok, bought tractor with bad clutch. Replaced clutch, did rear main seal while I had tractor split... Old clutch was soaked in oil.
Put new seals in, followed directions..
Did not trim was able to work both halves completely into the grooves leaving them very slightly "proud" so that they bolted together completely flush... Reassemble and fired up
Drip drip drip, WTF!!
Gonna put in new oil pan gasket now before I split this damn thing again. The plugs on the back of block were clean no oil... I'm at a loss.

Dieseltech · Mar 13, 2017

Loose main bearings maybe? If crank is not centered the seal will still leak.

rockepg · Mar 13, 2017

Is this a rope seal in the rear main bearing cap on this one? Or the external one piece seal?

Brendon Warren · Mar 14, 2017

Are you sure its engine oil and not hydraulic oil from the transmission?

Dieseltech · Mar 14, 2017

What color is the dripping oil? Diesel engine will be black, rear end oil is usually a light tan color. Remove the lower inspection plate and see if oil is being thrown from the clutch assembly with the engine running. If so it's likely rear end oil, make sure you have a face shield on..

Cueballtech · Mar 14, 2017

It's fresh engine oil.

Cueballtech · Mar 14, 2017

Rope seal

Cueballtech · Mar 14, 2017

Yes I'm 100% positive it's fresh engine oil.

rockepg · Mar 14, 2017

Assuming this is a diesel..
May sound really odvious but when you bolted the split housing back together and back onto the block did you remember to put new the gaskets between the housing and the block? Also did you put a dab of rtv between the housing halfs before bolting them together?

Cueballtech · Mar 14, 2017

Yes it's a diesel
Yeah I did the gasket and dabs of RTV
sealant. That's part of the reason I'm
confused.

jtwat · Mar 14, 2017

Did you soak the rope seals in oil before installing them? Some require soaking to swell the rope. If not, it may stop leaking when the seals swell.

Cueballtech · Mar 14, 2017

I soaked them in clean 15/40 for a couple hours.

rockepg · Mar 14, 2017

That was going to be my next question.. I soak them for 24 hours before installing.

rockepg · Mar 14, 2017

That was going to be my next question.. I soak them for 24 hours before installing.

Cueballtech · Mar 14, 2017

Will they swell more after install?

rockepg · Mar 14, 2017

Hard to say.. You compress them pretty good to install so not sure it'll absorb anything more. I would try the pan seal before you split the tractor again though. Not at all uncommon for that real seal to leak.

ptfarmer · Mar 14, 2017

Rope seals are a pain they seem to leak some no matter what. When it drips does it drip once a minute, once an hour, every 5 seconds? On tractors that have the rope seal I drill a hole in the bell housing so if the rear seal leaks it will drain, and not hold oil (see red dot in picture).

Cueballtech · Mar 15, 2017

Well, looks like I'm gonna go ahead and split it again. I'm gonna put a new main seal in and drop the oil pan for gaskets, gonna replace the gallery plugs I think. I think I'm gonna go ahead and drop the main caps as well and do the main bearings and thrust washers as well...
Hopefully this will solve the leak.

rockepg · Mar 15, 2017

Make sure to soak the main seal over night. I usually do at least 24 hours..

Cueballtech · Mar 15, 2017

Will do, any advice on doing the mains and
thrusts?

rockepg · Mar 15, 2017

No harm in checking them out but honestly if it aint broke don't fix it.

Massey 65 Perkins rear main

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