Propshaft UJ's. Greasing the spider

ONE LIFE LIVE IT. D90 · Dec 20, 2016

My 90 eats UJ's for breakfast changing them every 6k. I always fit OEM gkn items which seem good quality. Granted it did have a 2" suspension lift until a few months back, not many off road miles though.

Why though, every time I come to bloody grease them, does the grease only go into one or 2 sides of the spider. Leaving the other cups totally dry!

It's usually those sides of that UJ that fail too. I fit them as you should, and the laSt 2 I've fitted have fitted perfectly and is minimal resistance when the circlips are fitted.

It's always gearbox ends that fail. The ones closest the axles on both props have been on the vehicle since I owned it, and the grease goes all througout the spider in both cases. I believe this is why they are lasting so well.

Anybody else have this?

listerdiesel · Dec 20, 2016

Our Disco 2 V8 hasn't had a UJ go for years, but you do need to ensure that the grease seals don't get damaged when you assemble the UJ. Grease will always find the easy exit, leaving other sections without grease.

Our D2 has greasable UJ's now, I grease them once or twice a year as we do a lot of heavy towing, but they seem pretty happy, I did them a couple of weeks ago.

Peter

freelance · Dec 20, 2016

Perhaps you overgrease when new? Give them one shot every three months( quality grease mind )!

neilly · Dec 20, 2016

Do you grease them after you have taken the car for a run?

I find they tend to grease better when I grease them straight after stopping following a nice drive. Guess the grease in the UJ is a little warmer.

Cheers

Disco1BFG · Dec 20, 2016

neilly said:
Do you grease them after you have taken the car for a run?

I find they tend to grease better when I grease them straight after stopping following a nice drive. Guess the grease in the UJ is a little warmer.

Cheers

Wot he says ^^^^ get em warm before greasing - take em for a run - hot air gun etc.... etc.

I grease all ours at least every three months, and use a (much) better grease than specified. ( Castrol Pyroplex Red ) - It works well, and is cheaper than replacing the hardy spicers - YMMV.

And... on the rare occasions I do replace a U/J, ( which is usually on a PTO shaft ), I disassemble it, clean it, and check the grease ways, and use new grease to re-assemble - over kill? maybe.

neilly · Dec 20, 2016

freelance said:
Perhaps you overgrease when new? Give them one shot every three months( quality grease mind )!

How do you overgrease a new UJ?

Cheers

discool · Dec 20, 2016

neilly said:
How do you overgrease a new UJ?

Cheers

Just keep pumping additional grease in until it falls out onto the floor. Simples

But... How does it tend to grease better when you grease them straight after stopping following a nice drive?
With a Wanner 315 Swiss made grease gun with its 8000 lbs p.s.i pressure it easy and better at any time

neilly · Dec 20, 2016

discool said:
Just keep pumping additional grease in until it falls out onto the floor. Simples

But... How does it tend to grease better when you grease them straight after stopping following a nice drive?
With a Wanner 315 Swiss made grease gun with its 8000 lbs p.s.i pressure it easy and better at any time

It was a question for freelance?

Cheers

freelance · Dec 20, 2016

neilly said:
It was a question for freelance?
Much as discool suggested, but you can move/ burst the seals whilst pumping too much grease in, don't forget they all come pre packed with the right amount of grease for optimum life from manufacturers, when topping up during service all you want to achieve , is to remove any dust/ dirt/ contaminated grease from seal area, not a complete purge of grease.
Just my opinion, my two penneth worth!

neilly · Dec 20, 2016

OK,

Well as you say , it must be a difference of opinion. Although I never mentioned a complete purge of grease and the question was in reply to your statement about overgreasing the UJ when new. For me grease oozing out when greasing a UJ is only a waste of grease not a case of overgreasing the UJ.

The New GKN UJ HD I have is greased in the cups but the drillings are not pregreased from the grease nipple hole to the cups. Plus the seals themselves could in no way be displaced using a normal handpumped grease gun. Unless they were damaged during assy, in which case the UJ is in need of replacement before it has done any miles. I will continue to grease new UJ's until the grease starts to ooze out of a couple of the cups.

But as said this is just a difference in opinion and not the end of the world.

Cheers

brian47 · Dec 20, 2016

"Over-greasing"?
I was aware that items such as wheel bearings could be over-greased, i.e, stuffing too much grease into them during assembly, but U/Js? I don't see how that is possible since any excess will squirt out around the rubber dust covers.

8ha · Dec 21, 2016

does front propshaft uj go more often than rear one is front prop shaft fitted out of phase as it should be

Propshaft UJ's. Greasing the spider

ONE LIFE LIVE IT. D90

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listerdiesel

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freelance

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neilly

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Disco1BFG

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neilly

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discool

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neilly

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freelance

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neilly

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brian47

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8ha

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