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I just acquired a 99 vintage LB to handle a steep area of my yard and was wondering what type and how much grease to pump into the rear drive fittings. Everything seems to be working properly and would like to keep it that way. Thanks for any all advice.

If it has a zerk, any good grease will do. If no zerk be careful applying any grease to area where grease will attract dirt, causing wear. Exactly what do you mean by rear drive fittings?

What model number is your mower?

10323 Thanks for the reply, I was indeed referring to the rear drive grease fittings (zerk)

I have used Lucas Red "N" Tacky in my 1999 vintage 10525 Lawnboy for the last 20 years ( also my snow blower ). Keep pumping it in the fitting until you see it squeezing out at the wheel axle. It does the job for me.

https://lucasoil.com/products/grease/red-n-tacky-grease

I have experienced the grease in a Lawn-Boy's joints turning to a wax-like lump that I had to remove in order to apply grease that actually reached the joint. It was so hard I didn't realize what it was until I picked at it and chunks of the dried grease broke off. This was in a circa 1990 mower. Just something to think about if you've never broken the joint down.

I have not used the grease you mentioned. I am using a white lithium marine grease for wheels right now. Seems like the right stuff for joints that can get wet.

Pumping grease in this type of drive system is going to cause problems, not allowing the enga key to properly catch the drive gear. One maybe two pumps a year is all you need. Second, I can find no record of Lawn Boy making a model 10525, could it be a 10515?

His reply looks like 10323 to me.

Post number 5

Rivets said:

Pumping grease in this type of drive system is going to cause problems, not allowing the enga key to properly catch the drive gear. One maybe two pumps a year is all you need. Second, I can find no record of Lawn Boy making a model 10525, could it be a 10515?

Click to expand...

Considering I have 2 10525's I think I'm good. Check out Parts Tree

https://www.partstree.com/search/?t...walk+behind+mower+2000+sn+200000001+200999999

Rivets said:

Pumping grease in this type of drive system is going to cause problems, not allowing the enga key to properly catch the drive gear. One maybe two pumps a year is all you need. Second, I can find no record of Lawn Boy making a model 10525, could it be a 10515?

Click to expand...

I do once a year in spring and fortunately I have lots of drive axle back up parts....but I know what you mean after tearing down a few junkers and de-greasing the guts inside. PS - the drive line on my 1999 10525 has never been apart.

Did another search and found the 10525, must have screwed up when searching before. Wait, I don’t do that.

Rivets: Oh, I see. I thought you were replying to the original poster. Sorry 'bout that.