Most control valves have an inlet , which usually has a relief valve nearby on the inlet section of the valve..On the oposite side of the valve the return line usually attaches..Then off the top or bottom of the valve are 4 lines in your case that supply oil to the different functions of the valve..Those 4 lines control lift and lower of boom and roll back and dump of bucket..Look at the way the lines are plumbed..Are the lines for the boom lift in row with the valve spool, and the same with the bucket spool..One line lifts and the other lowers on the boom valve spool..If they're crossed it just won't work..One cylinder will work against the other..
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Today's Featured Article - Fabricating Sidesheets - by Chris Pratt. The easiest and best first-time project for wanna-be sheet-metal workers like myself is flat or nearly flat metal cut and drilled to be a tractor's sidesheet. A sidesheet is sheetmetal to cover either the engine as in the case of early Oliver's, Massey-Harris' and many crawlers or the wiring and electrical components as in the case of the Massey-Harris Pony, Allis Chalmers' D Series (D-14, D-15, D-12, D-10, D-17, and D-19). The need for fabricating becomes obvious when you go to buy any of these
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