FuzzyDriver
Well-Known Member
- Joined
- May 7, 2016
- Threads
- 13
- Messages
- 221
My S21ZSN would not pull itself, but was kinda hard to push or pull backwards. When I lifted the rear the wheels would turn, but as soon as I set it down they would stop. I read the other thread about this, which gave me the right start on the problem. I took the bottom of the drive case off. Contrary to a previous post, it can be done without removing the shaft, wheels, etc. but the rear-most bolts are very difficult to get a wrench on (7/16"). I found the inside of the case filled with caked, hardened, 27-year-old grease. I scraped it all out and cleaned up the 'innerds'. The question now is: What lubricant should I use?
- The stuff I got out reminds me of wheel bearing grease
- The dealer I bought it from this week (new) did not know. After talking it over with him, he suggested 90W gear lube.
- There's a tiny drain plug on the bottom of the case. Clearly, grease would never drain from this plug. EVER.
- If you remove the engagement arm you can also remove the O-ring and adapter for the arm. At that point, you can squirt in lubricant around the shaft.
- Looking at the worm drive, drive return spring, etc. I don't see any reason why they would need a heavy grease for lubrication.
- The plug looks to be the same threads as a zerk. If the gunk inside is indeed grease, maybe the factory used a temporary zerk to fill it and then replaced it with the plug (just a guess).
So what do you guys think? I am tempted to use maybe a heavier motor oil like 40 Wt, or the suggested 90 W gear lube - something that can be drained out in the future. I do not want to mess around taking this thing apart again if I can possibly help it. Thanks in advance for your advice!
- The stuff I got out reminds me of wheel bearing grease
- The dealer I bought it from this week (new) did not know. After talking it over with him, he suggested 90W gear lube.
- There's a tiny drain plug on the bottom of the case. Clearly, grease would never drain from this plug. EVER.
- If you remove the engagement arm you can also remove the O-ring and adapter for the arm. At that point, you can squirt in lubricant around the shaft.
- Looking at the worm drive, drive return spring, etc. I don't see any reason why they would need a heavy grease for lubrication.
- The plug looks to be the same threads as a zerk. If the gunk inside is indeed grease, maybe the factory used a temporary zerk to fill it and then replaced it with the plug (just a guess).
So what do you guys think? I am tempted to use maybe a heavier motor oil like 40 Wt, or the suggested 90 W gear lube - something that can be drained out in the future. I do not want to mess around taking this thing apart again if I can possibly help it. Thanks in advance for your advice!