Posted by jimb2 on September 15, 2014 at 18:32:19 from (99.241.118.87):
In Reply to: 885 vibration posted by Gary Vestal on September 14, 2014 at 18:08:17:
Gary, you have to determine the source of the vibration. Try using the old mechanic's trick by holding a length of dowel or broomstick against the engine and the other end against your ear lobe. Keep moving the broomstick until you find the source of noise or vibrations. Possible sources: 1) Engine balance on front of engine under crankshaft. 2) PTO shaft drive splines in pressure plate. 3) Hydraulic system that has dirt constricting a valve. Hydraulics on this tractor is run from a single pump that is driven off the PTO shaft and output goes to MCV valve that is where the hydraulic filter is mounted. The MCV valve splits the 12 or 15 GPM pump hydraulic flow into 3 GPM for PS, PB, PTO and hydraulic oil cooler and remainder goes to 3pt and remotes. The PS has a 1500 PSI relief valve and the 3pth and remotes have a 2250 PSI relief valve.
Make sure there is plenty of hydraulic fluid in transmission and there is no hydraulic leaks around hydraulic filter where pump would suck air and cavitate.
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