How much grease into the rear axel zerks?
- Thread starter Pstrang
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Ranch_Hand_Supp
Advertiser
PSTRANG,
Remember this is a opinion board and this post is my opinion .......... but do note, I ain't got ner education....
From what I have seen on your model tractor............. is that there has been little to no lube/grease behind any of the grease fittings from the factory.
The rear axle has 3 seals, The one inner seal keeps the transmission/rear differential oil from filling up the axle tube. The other two are the outer seals, they are piggy backed/on top of each other. They keep dirt,mud, water etc from entering the axle tube. The outer two seals are very well protected by design of seal installation. Most of the time on a tractor if you see oil coming out of a rear axle seal....... the bearing will be bad, which took out the seal. I think it would take a whole lot of grease and PRESSURE to push to much grease out of the axle seal.
The inner axle bearing is lubed by the trans/diff oil. ..... the bearing runs in oil.
The lube for the outer bearing depends on you and your grease gun.
There is a small void (air gap) between the two outer seals and the outer axle bearing. This void has to be filled before the grease is capable of being pushed in/through the bearing. I'm guessing it may take two ounces to fill the void.(you figure the pumps. During install of new bearing. I will pack the bearing prior to install ...... fill the void with grease........ install cap/seal. ) After that, doing as Diamond Pilot posted would be a good/average guide to go by for most all users.
I don't think you have done any harm by pumping in 1 1/2 tubes of grease. Guessing again...... it would probably take over 4-6 tubes of grease to fill the axle tube?. The tube inner opens up pretty good when gets near the bull gear. The bearing is full now though, wink....... next time you grease it you will be pushing the broken down grease out and refilling with fresh. Same process even without the extra 1 1/2 tubes. I think it's going to take a very long time to fill the axle tube.
Both the inner and outer axle bearings are deep-grooved ball bearings. This style of bearing is found through out the complete drive train (gear boxes) on your Jinma and many other brands of tractors. The bearings in your tractor do not operate at the continuous speeds, temperature or demand that are talked about in the link that Brook Rooks provided about bearings used in industrial applications....... no bearing like that on your tractor. I have never worked on anything that was that big / industrial that requires that kind of TLC to keep it alive ..... don't know nothing about it.
When I find a grease fitting and I don't know what is behind it ?????.......... I don't pump nothing till I do. But your right, most Agricultural Equipment does give you signs when to stop.
Ronald
Ranch Hand Supply
Bob Rooks
Elite Member
I agree with you Ronald. Advanced knowledge has no place around slow moving farm tractors.
At least you got my last name right:laughing:
At least you got my last name right:laughing:
erj
Gold Member
I have chosen to put 3 or 4 pumps of grease into those 2 rear axle zerks every 100 hours for these reasons:
125 is the inside bearing that runs in the transmission oil. 146 is the oil seal that prevents the transmission oil from moving further outboard.
150 is the grease fitting intended to lubricate bearing 154. The 2 oil seals (155) are to keep the grease from leaking outboard.
There was also a posting several years ago on one of these tractor sites by someone who was reworking that section of the Jinma tractor. I did several searches but could not find it. His pictures showed (to my satisfaction) why that zerk should be greased but not heavily.
RonJ
125 is the inside bearing that runs in the transmission oil. 146 is the oil seal that prevents the transmission oil from moving further outboard.
150 is the grease fitting intended to lubricate bearing 154. The 2 oil seals (155) are to keep the grease from leaking outboard.
There was also a posting several years ago on one of these tractor sites by someone who was reworking that section of the Jinma tractor. I did several searches but could not find it. His pictures showed (to my satisfaction) why that zerk should be greased but not heavily.
RonJ