Combines Maindrive belt on R50

no slippage will occur on main drive belt. With proper tention can handle 300 hp. Must have distance between coils of diameter of two stacked quarters Tightening much more than that not adding much more tention. The bumper should be compressed 1_4" with the nuts and washer on the BOTTOM pushing down on the idler. There is a little plastic guide that protects the threads. It needs to be in good shape. NOTHING goes on top of threads sticking up past frame. Idler must be allowed full movement down to take up slack in belt! And these are AGCO kevlar beltsIJ.

Had a similar problem last month on out N 7 and found the belt guide that sits below the pulley on the engine end had broken off. Replaced the guide and quit tearing up belts.

I have the belt set up just as the book tells me to.The belts are Agco Belts they cost $380 per belt.I have also realined idler pully.

Main drive and hydro drive belts need to be aligned perfectly with a new belt. A new rubbery belt in them locations will come off at the speed they go if not aligned perfectly. Be sure the bushings in pivot and the pivot stud are not worn. I don't think the hydralic pump has anything to do with a failing belt. Check spring for second stage poppet to see it is not broke for you header lift problem.

Ruben

slow header lift is not necessarily caused by a bad belt. Assuming the R50's have the same high_low pressure hydraulic system that the N6 has, if the pump isn't being triggered to high pressure mode then the header lift and steering response will all be slow. I don't see how this would have anything to do with destroying main drive belts though. On the N6 the hydraulic pump runs straight off the end of the engine through a coupler, not through a belt. (keep in mind I have no experience with R50's, just N6's

slow header lift is not necessarily caused by a bad pump. Assuming the R50's have the same high_low pressure hydraulic system that the N6 has, if the pump isn't being triggered to high pressure mode then the header lift and steering response will all be slow. I don't see how this would have anything to do with destroying main drive belts though. On the N6 the hydraulic pump runs straight off the end of the engine through a coupler, not through a belt. (keep in mind I have no experience with R50's, just N6's

Sorry I took so long to answer. I had to look back in receipts back in 96'. look in parts book under Valve, header lift.In my book it is page n340. Part 14 is your problem for your hydraulics. Original partn70923845 changes to n71367795. Make sure you get the new one. If Iremember correctly it is a square o-ring replacing a round one in cross section.