First, you don't change the filter. It's a stainless steel filter you wash out and reuse. The rectangular box on the right side of the tractor is the reservoir for the front loader. The cone on the top of it has the filter. Just remove the four screws and remove the cap and the filter is located there. If your tractor is missing the filter then this is the part you need. Marvel Engineering Co. Bypass Filter Element
NSN: 4330-00-918-8077
P/N M-2032-135-35
Stainless Steel Mesh
Hydraulic Filter
Top and Bottom are Steel
Name on Filter is...
MARVEL ENGINEERING COMPANY
4" LONG 2 3/4" O.D
Top Bore is 1.
With Inside Threaded End
The Other End Has a Pressure Bypass
9786E128
From your description it sounds like more than likely your hydraulic pump needs to be overhauled. There may also be some leakage with the control mechanism. I believe I would have a qualified mechanic with the proper tools look at it.
This post was edited by Stephen Newell at 03:47:45 11/07/12.