Posted by EliG on May 07, 2014 at 15:31:36 from (166.182.3.120):
In Reply to: case 400 fluid change posted by 400 super nate on May 07, 2014 at 03:58:04:
Here's what I did when I bought my 400 back to life. I rebuilt the engine so I have been using case brand sae 30 weight oil. If your engine has a lot of hours you could probably get by with a diesel rated 15W-40.
For the transmission I removed the covers to inspect the gears and removed as much sludge out of the bottom of it as I could. I filled it with diesel fuel and drug the tractor around the yard to slosh it around. Dumpped the diesel fuel and refilled with 85W-140 oil from the local tractor supply store.
For the hydraulic system I dumpped it and removed the filter. It is behindthe cover with 3 bolts on the lower right hand corner on the back of the tractor. The filter is cleanable but I chose to replace it. With the filter out you can clean out the bottom of the reservoir. I've been using a case rated hydraulic oil from the local tractor supply store in the hydraulic system. If the system is weak you can add a quart of 85W-140.
So far I've done a little plowing and mowing with mine and so far so good.
If you have more questions post on the Case and David Brown forum. There are a lot of good folks over there.
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