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Bobcat farmboy
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<blockquote data-quote="DSTEVENS" data-source="post: 100295" data-attributes="member: 13824"><p>The person that worked on my pumps for the farmboy told me that the charge pump was over pressuring the hydrastat pump because of a worn seal, there was a bolt broken off on one pintle shaft seal retainer and it pushed seal out enough to empty the hydro oil in short order. There was also a bolt broken off in the case between the two hydrastat pumps, that one was repaired by a machine shop. According to owner of shop original cessna pump was in very good shape, no damage or metal particles inside. I changed all of hoses, and put 15/40 diesel oil in hydraulics. The noise and shudder in hydraulics is gone. So far it is smooth operation up and down. Certain oem parts are unavailable, and some are a retrofit kit, that cost a ridiculous amount. The belt tensioner/idler and spring assembly is NLA, and a retrofit is available, however i found an exact size lawnmower deck idler at tractor supply and fabbed up some spacers and a bushing and mounted it on the original control arm with original spring tensioner. So far it works great, i have a hydraulic leak somewhere around loader valve body and it is hard to pinpoint. I need to pressure wash everything again and continue looking. Next i plan to drain chaincase and refill. I have made a muffler for it out of automotive exhaust pipe and routed it in same fashion as original to rear "stack". i am 6'4" so i removed lap bar to ease my entry and exit, disconnected pedal locks, so it would work without bar. Slowly getting things in order, rear door was bent from impact, i have it straight and remounted, needs a weld in one area and it will be good. Hopefully get everything worked out by fall. Best Wishes. D.</p></blockquote><p></p>
[QUOTE="DSTEVENS, post: 100295, member: 13824"] The person that worked on my pumps for the farmboy told me that the charge pump was over pressuring the hydrastat pump because of a worn seal, there was a bolt broken off on one pintle shaft seal retainer and it pushed seal out enough to empty the hydro oil in short order. There was also a bolt broken off in the case between the two hydrastat pumps, that one was repaired by a machine shop. According to owner of shop original cessna pump was in very good shape, no damage or metal particles inside. I changed all of hoses, and put 15/40 diesel oil in hydraulics. The noise and shudder in hydraulics is gone. So far it is smooth operation up and down. Certain oem parts are unavailable, and some are a retrofit kit, that cost a ridiculous amount. The belt tensioner/idler and spring assembly is NLA, and a retrofit is available, however i found an exact size lawnmower deck idler at tractor supply and fabbed up some spacers and a bushing and mounted it on the original control arm with original spring tensioner. So far it works great, i have a hydraulic leak somewhere around loader valve body and it is hard to pinpoint. I need to pressure wash everything again and continue looking. Next i plan to drain chaincase and refill. I have made a muffler for it out of automotive exhaust pipe and routed it in same fashion as original to rear "stack". i am 6'4" so i removed lap bar to ease my entry and exit, disconnected pedal locks, so it would work without bar. Slowly getting things in order, rear door was bent from impact, i have it straight and remounted, needs a weld in one area and it will be good. Hopefully get everything worked out by fall. Best Wishes. D. [/QUOTE]
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