What grease for wheel bearings?

simp5782

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What type of grease should I use to pack wheel bearing on my m923 ?
It's your choice on what you have available. I use Rotella HD red or yellow cause I get it $3 a tube. Some folks like Lucas. Some like original GAA.

I have buckets of valvoline red and black I use for 5th wheels and cables
 

G744

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Any good grease but moly. It turns to mush when mixed with even a tiny bit of gear oil, and I guarantee oil will leak a bit.

DDG
 

Ajax MD

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I actually researched the specifications for the milspec GAA vs. Lucas Red 'n Tacky and several other lithium based greases.

The Lucas most closely matches the specifications of GAA compared to other lithium based greases in the categories of Penetration, Drop Point, Viscosity, Separation, Corrosion Protection and Water Resistance.

I decided that a new tub of Lucas Red 'n Tacky was better than a 20 year old tub of GAA that has been sitting on a hot warehouse shelf.
 

charlesmann

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For those that have repacked their hubs, front and rear. How much grease, ball park, does each hub take? With ctis disabled (not working at control unit) and lines going into the axles capped and plugged, should i get a hub seal kit w/o ctis or should i even replace the seals?
 

simp5782

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For those that have repacked their hubs, front and rear. How much grease, ball park, does each hub take? With ctis disabled (not working at control unit) and lines going into the axles capped and plugged, should i get a hub seal kit w/o ctis or should i even replace the seals?
Leave the seals out and pack the empty space with grease.

Around 3 tubes per hub between packing and filling the empty space if you clean out a majority of the old grease.
 

charlesmann

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@simp5782 You mean leave the ctis seals out? There are seal kits for the 939 series for with and w/o ctis. They are sold on boyce equip.
If you do mean leave the ctis seal out, wouldnt getting the kit w/o the seals be better?
 

simp5782

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@simp5782 You mean leave the ctis seals out? There are seal kits for the 939 series for with and w/o ctis. They are sold on boyce equip.
If you do mean leave the ctis seal out, wouldnt getting the kit w/o the seals be better?
Yes. You do not need the seals for the CTIS if it is not operational. Sometimes the kits are nearly the same price for A1 and A2s. Or I find one of the other cheaper. It just depends on what I run across as to what I use. So leave them out regardless of what kit you get.

Or buy the seals individually for 5 to 15$ if you search ebay.
 

dmetalmiki

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Any good grease but moly. It turns to mush when mixed with even a tiny bit of gear oil, and I guarantee oil will leak a bit.

DDG
HMMM, But, Someone once told me "that gearbox is absolutely K....d", it will last about two weeks, knocking growling jumping out of second gear (1943 Ford jeep).
I FILLED (packed) the gearbox with molyslip grease...And it has been fine ever since.
WHEN?.........................1968!!
Transfer case, Hubs, tractor joints similarly packed. Also good to date.
Front and rear axles mollied.
What can I say.
'Cept moly is in every truck I own, ( And every car) Engines included.
 

charlesmann

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This specification requires a grease that is capable of lubrication and corrosion protection over an extremely wide range of temperatures; there is no currently available non-government standard which fulfills the requirements of this specification.
Check out royco 22cf or mobile 28. it is not the same mil-prf, but comes close to the requirements of the gaa grease. The down side to royco is its awful smell.
 

Floridianson

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Looking over the requirements you posted for a grease that will be applied to the outside or exposed sides of artillery is one thing. Yes it does say it can be used for other things but does not specifically say from what I read wheel bearings or that is the only grease that can be used for wheel bearings. Guess it was easer to have just one grease at the time of military service but now in civilian hands we can choose what we think best. I still prefer a EP grease used more today in wheel bearings and equipment. Here I am not worried about biodegradability, smell, color, not staining my cloths or discoloration of other surfaces. Plus mixing with other greases what we do not do on wheel bearings plus weather proof to a point or exposure to the elements. As always your truck do as you will.
 
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sigo

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I’ve found every type of Lucas I try seeps out of my grease gun when it gets hot in the sun. GAA doesn’t. It doesn’t get much more unscientific than that, but GAA doesn’t seem to ooze liquid like all types of modern grease I try. If it ain’t broke, don’t fix it. I stick with GAA whenever possible.
 
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