Just now starting to enjoy my first dozer...then it decides to start leaking. I assume its the crank seal. Belts wet, oil sling witness mark under cowling in front of motor. Looking for any absolute do's and don't as I consider trying to beat a $1000+ repair bill at a shop. 1997 450G 4050hrs
Be sure it's a seal problem first. Be sure oil level is correct (correct dipstick) and that all crankcase breather devices are working properly. If the crank pulley has a bolt to secure it, look for any evidence of looseness. While it probably is a seal, you may get lucky.
Thanks...I'll check the basics. Found it at the end of the day. Cussed, then locked the hood back. I will check all these things, hoping for something positive.
It's a fairly easy job but you will need a special tool for replacing the seal. What's in there now is likely a wear sleeve on the crank and then the seal. The new seal will be a 1 piece seal, (wear sleeve and seal together) which requires the special tool to install. There is also a tool made for removing the old wear sleeve. If I remember right the book says to remove the radiator ect. but I did one a while back and was able to do it without removing it but that's where the special tools help out. Not much room that way.
source of leak... Thanks for all the tips on repair... Check out pics to see what I found. Somebodies "field repair" came loose. No broken bolts. Threads I good shape. New parts in hand.