Hey all! The swing stopped working on the Cat 426b backhoe/loader Im working on, so I pulled the 2 resolvers on either side of it and there was only a small piece of oring left, on the very bottom of the stem. I bought new orings for it, but there is no diagram with em and they are 5 different sizes and 2 colors. I pulled the swing resolver itself, hoping for a reference, but most of them are gone too! Ive found several diagrams online, but they are in black n white and not clear enough to tell the different sizes. Does anyone out there have a clear diagram of these orings and resolvers that I can go by? I need to do the bucket also, dont know if they are the same or not. Thanks a lot for any help!
Come on guys, dont tell me nobodys done this job themselves before? Doesnt anyone know how to replace the orings on the control valves?
I picked a 5yj serial number
Thanks heymccall! Your diagrams are a lot clearer than the ones I got. Still cant tell for sure which sizes go where, but you gave me the info about the valve upgrade, which Id rather have and would solve the problem!
Got it figured out! The parts list you sent me had part numbers that matched a line of numbers on each oring bag. Feeling dumb now! Got 3 resolvers done yesterday. Still got the 3 ck valves to do, then the same for the bucket unit. Hope to get done tday. The middle orings are pretty hard to get in place, without damaging them.
Soaking them in warm hydraulic oil might soften them up and make it easier to get them in place.
Good idea! But now I have another problem. I got the hoe resolvers done, but on the bucket bank of valves, I could only get 1 cover completely off, to get the valve out. The other 2 wont come off enough to get those 2 out. One seems to be held on by a little stem, with a spring on it. Cant tell, if theres a tiny clip, or not, and the other, just doesnt want to slide over whatever kind of "sleeve", or"housing", thats on the inside of it! Anybody know what Im talking about? I need to get this fixed. Any help is much appreciated. Thanks guys!
Ok, I got the housing off that had the electric wire plugged into it. It had a little c-clip, holding on a "plate", with a little spring. Fixing to overhaul that valve. Orings are busted. Still need to find out how that last one is held one. Anyone know?
Yea! I got it! After I loosened it up, (again), I reached up with one hand and pushed the top of the housing away from the valve, as much as I could, while turning the housing back n forth, and the valve dropped out into my hand! Im posting all this in hopes it helps someome in the future. I figure thats what these forums are supposed to be for. They have sure helped me a lot.