Kubota B21 Oil Tank Gasket - Does this exist?

   / Kubota B21 Oil Tank Gasket - Does this exist? #1  

Bars84CRX

New member
Joined
Jul 3, 2021
Messages
2
Tractor
Kubota B21
Hello, new guy here. Bought a B21 from a friend a few months back to help clear my dad's 5 acres of property, cars and business. Came with forks, a back hoe, bush hog and a box scrape. Dad passed in October and left a mess.

Quick question is - This thing leaks hydraulic fluid all over the shop. I removed the pan and found nothing but black RTV holding it together, no gasket. I get online and look, and sure enough, no gasket showing up in drawings. I'm really surprised b/c of how the tank is made with a groove all the way around on the inside of all the screws. Am I supposed to fill that groove with RTV (plus a little bit for spreading) and rock on? Previous installer had it slathered on waaay too much. I've been a Corvair guy going on 25 years now so I'm a decent mechanic. I avoid RTV at all costs if possible. I need this thing working and back moving cars, parts and trash!

I only want to do this once so thanks for your time.

(Dad's mess if you're interested - House w/full basement on 5 acres with 60x80 shop w/12' ceilings. I counted 17 cars either running or covered with 20+ in the field(s). 2 tractor trailers full of textile parts. Already carried off 95 tires and 1400 lbs of scrap including a fridge, oven and a dishwasher full of Corvair transmissions and differentials. I see three more fridges and an oven for easy pickin' just to make some room. Took my 4th truck load paper to recycle today. Oldest paperwork found was from 1979 when he started the textile business.)
 
   / Kubota B21 Oil Tank Gasket - Does this exist? #2  
You'd have to check the parts breakdown at kubotausa.com but it's quite possible there is no gasket. Much machinery uses none. The common replacement is the gray gasket making RTV - and don't overdo it. You can get the stuff at Auto Zone, O'Reilly's, or other parts places. I learned that while trying to reseal the Spicer - Dana transaxle on my garden tractor.
 
   / Kubota B21 Oil Tank Gasket - Does this exist?
  • Thread Starter
#3  
I found this image on colemanequip.com. I'll find some gray and get on it.
Also, I did find one screw that was short (035) but wasn't in the location below. I'll correct that. That one may have been bottoming out below the filter.

Confirmed same diagram is on kubotausa, too. Thanks for confirmation.

1625399519926.png
 
Last edited:

Tractor & Equipment Auctions

2015 Ford F-450 Crew Cab Knapheide Service Truck (A50323)
2015 Ford F-450...
2014 Volkswagen Jetta Sedan (A50324)
2014 Volkswagen...
71066 (A49346)
71066 (A49346)
1269 (A50490)
1269 (A50490)
2013 Ford E350 Box Truck (A47384)
2013 Ford E350 Box...
2012 KENWORTH T800 SLEEPER (A50854)
2012 KENWORTH T800...
 
Top