Trevor4440
Member
Gentlemen in the 4440 owners manual it shows to have the dealer clean the main hydraulic pump filter at 1200 hours. On the JD Parts Catalog under the hydraulic stroke control valve it shows this but only on the original 49 CM 3 pump and located above a drain plug with a spring. I'd guess this hasn't ever been done on mine tractor has 5500 hours and the pump started whining a little under load and right at start up so I wanted to do along with the trans filter and screen. I asked some local guys that have farmed with 30/40 series tractors their whole lives and neither knew of that front pump filter. My question is there any reason that this is specifically called to be done by a dealer? I see that it is spring loaded is a bunch of stuff going to pop out or is it fairly straight forward?