Jet Lube MP-50 Moly Paste


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jaimenv
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Jet Lube MP-50 Moly Paste

Post by jaimenv » Sat Mar 02, 2019 1:36 pm







Got me some of this Jet lube MP-50 moly paste and figure the specs are good enough to try it.
Whomever service the splines in the rear drive used what look like regular moly enriched grease.
Yet the splines look real good.
While in there took care of the bearings by repacking with mobil 1 synthetic red grease.

Anybody else have used this mp-50 moly paste?


Jaime

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AZgl1800
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Re: Jet Lube MP-50 Moly Paste

Post by AZgl1800 » Sat Mar 02, 2019 7:45 pm

considering that Honda once spec'd a lower amount of Moly, it will be just fine.
~John

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Re: Jet Lube MP-50 Moly Paste

Post by CrystalPistol » Sun Mar 03, 2019 7:12 pm

jaimenv wrote:
Sat Mar 02, 2019 1:36 pm

Whomever service the splines in the rear drive used what look like regular moly enriched grease.
What I use …. splines always look great when wiped clean for inspection, like new even.


Never heard of or seen that mp-50 moly paste.
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Re: Jet Lube MP-50 Moly Paste

Post by WingAdmin » Tue Mar 05, 2019 9:59 am

jaimenv wrote:
Sat Mar 02, 2019 1:36 pm
WP_20190302_13_34_15_Pro.jpgWP_20190302_13_36_39_Pro.jpg

Got me some of this Jet lube MP-50 moly paste and figure the specs are good enough to try it.
Whomever service the splines in the rear drive used what look like regular moly enriched grease.
Yet the splines look real good.
While in there took care of the bearings by repacking with mobil 1 synthetic red grease.

Anybody else have used this mp-50 moly paste?
The SDS for MP-50 states it contains between 43% and 58% Moly. While at the lower end of the spec, it should work fine.

Did you remove the bearings to repack them? Generally if the wheel bearings are removed, they need to be replaced, as the only way to press them out damages the races (you have to push them out using the inner race, which exerts force on the bearings and from there onto the outer race, which is where the press-fit occurs).

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Re: Jet Lube MP-50 Moly Paste

Post by WingAdmin » Tue Mar 05, 2019 10:08 am

CrystalPistol wrote:
Sun Mar 03, 2019 7:12 pm
jaimenv wrote:
Sat Mar 02, 2019 1:36 pm

Whomever service the splines in the rear drive used what look like regular moly enriched grease.
What I use …. splines always look great when wiped clean for inspection, like new even.
Valvoline VV632 WhlBrgGrs with Moly.jpg

Never heard of or seen that mp-50 moly paste.
That is the WRONG grease to use on splines. The spec for the grease to use on the splines is between 60-70% moly content. The grease you are using has a moly content of 2.5%.

That grease is intended for lubricating metal parts that move in relation to one another - to allow the two surfaces to slide across one another without wear.

In the spline application, the splines are not moving against one another (well they are, but only a very tiny amount, with driveline lash). They are however pressed against each other with an incredible amount of pressure. This is why Moly grease is required. Regular grease will be squeezed out from between the spline teeth very rapidly, and the centrifugal force of the rotation will fling the grease out and away. Essentially the only part of the grease being used is the moly part - and your grease has only 2.5% moly in it, so basically none.

Moly grease contains molybdenum - the "grease" component of moly grease is just a carrier, to transport the moly to the surface being protected. As the splines press together, they squeeze out the grease carrier, but leaves behind a coating of moly, which is left on both surfaces of the splines. This is what provides the required lubrication - the thin layer of moly, not the carrier grease, which is squeezed out and flung away.

So basically, using regular non-moly grease is not a whole lot better than using no lubrication as well.

The reason why your splines look "new" to you when you clean them off is because they are continually being worn, exposing fresh new metal. If you use a micrometer to measure what is left, you'll find they are actually wearing away - and at some point they will wear enough that the spline will start jumping and failing.

Using moly grease on all your driveline splines is not a luxury, it is a requirement.

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jaimenv
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Re: Jet Lube MP-50 Moly Paste

Post by jaimenv » Tue Mar 05, 2019 9:01 pm

WingAdmin wrote:
Tue Mar 05, 2019 9:59 am
jaimenv wrote:
Sat Mar 02, 2019 1:36 pm
WP_20190302_13_34_15_Pro.jpgWP_20190302_13_36_39_Pro.jpg

Got me some of this Jet lube MP-50 moly paste and figure the specs are good enough to try it.
Whomever service the splines in the rear drive used what look like regular moly enriched grease.
Yet the splines look real good.
While in there took care of the bearings by repacking with mobil 1 synthetic red grease.

Anybody else have used this mp-50 moly paste?
The SDS for MP-50 states it contains between 43% and 58% Moly. While at the lower end of the spec, it should work fine.

Did you remove the bearings to repack them? Generally if the wheel bearings are removed, they need to be replaced, as the only way to press them out damages the races (you have to push them out using the inner race, which exerts force on the bearings and from there onto the outer race, which is where the press-fit occurs).
Yes that would have been the case but, the seemingly new wheel bearings specially the larger one was loose in the wheel hub. I was able to tap it out whit out harming it. Removing the other smaller one once the spacer was out the way was cake.

So once the grease packing was done, since the wheel bearings where serviceable I installed the smaller one 1st and the spacer then I knurled the inside of the wheel hub so to create a interference with the bearing outer race and the wheel hub. pressed/hammered it in, Done.

I guess/figure that the original larger bearing locked/fail and spun the outer bearing race thus wearing the wheel hub causing the play with the new bearing. Or the new bearing was under spec.

In the past I have used supper glue to successfully repair worn bearing race to hub contact clearance, yet I gave knurling a chance since it is easier to work if the bearing has to be replaced.
Jaime

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CrystalPistol
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Re: Jet Lube MP-50 Moly Paste

Post by CrystalPistol » Thu Mar 07, 2019 2:07 pm

WingAdmin wrote:
Tue Mar 05, 2019 10:08 am
… etc … That is the WRONG grease … etc … so basically none.

Moly grease contains molybdenum … etc … squeezed out and flung away.
Well … I know what new machined metal looks like as opposed to that worn / polished by wear, and I've not found cast-off or flung away grease outside of where I put it, and I haven't seen evidence of that 60-70% moly content ...
... but "OK".
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Re: Jet Lube MP-50 Moly Paste

Post by Psycheonabike » Thu Mar 07, 2019 5:45 pm



This is the only one I can find.....anygood?



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