Hydraulic Whine - Slow Operation
Posted: Wed Dec 11, 2013 10:03 am
Hi fellas! (And ladies?) I haven't been on in a few weeks. Hope all is well!
My '54 Betty was at Cecil's Cubfest back in October (Cecil broke my Cubfest virginity! ) and we swapped out my cracked hydraulic reservoir for a replacement box and internal components. I noticed a few changes with the new unit and wanted to get some feedback.
We swapped out the new reservoir, filled it with hydraulic fluid, and it worked right at the start. In the coming days I started to hear an occasional whining. I checked the hydraulic fluid yesterday prior to plowing and noticed it was low. I wouldn't find that all too surprising. Since we were losing sunlight fast, we filled it at the Cubfest without really cycling the out of the touch control to properly bleed it. When I filled it yesterday, the extra poured out as a milky white. It appeared to be bubbly. A note here, I see no indication of any hydraulic fluid leaking into the crankcase. Oil appears clean and the dip stick doesn't show that I have an abnormally high amount of fluid.
Prior to posting this morning I read the touch control section of the manual and searched other threads here. Seems any air leak into the hydraulics will make this whining happen. This morning I started Betty and let her warm up a bit. No whining. I then took the reservoir filler lug off and the whine started immediately. I cycled the touch control about twenty times to bleed the system and make sure the fluid level was where it should be. Seemed good. Put the plug back on. I let it run for about twenty minutes and the whine started again. Note also that the whine stops when I move the touch control and then starts when it has completed its movement.
My questions:
1) Where would the most likely leak be? We only removed the rear hydraulic lines to the case and used a new gasket.
2) Also seems as though the blade will raise three times as fast as it lowers. What would cause that?
Thank you in advance for your assistance!
Calvin
My '54 Betty was at Cecil's Cubfest back in October (Cecil broke my Cubfest virginity! ) and we swapped out my cracked hydraulic reservoir for a replacement box and internal components. I noticed a few changes with the new unit and wanted to get some feedback.
We swapped out the new reservoir, filled it with hydraulic fluid, and it worked right at the start. In the coming days I started to hear an occasional whining. I checked the hydraulic fluid yesterday prior to plowing and noticed it was low. I wouldn't find that all too surprising. Since we were losing sunlight fast, we filled it at the Cubfest without really cycling the out of the touch control to properly bleed it. When I filled it yesterday, the extra poured out as a milky white. It appeared to be bubbly. A note here, I see no indication of any hydraulic fluid leaking into the crankcase. Oil appears clean and the dip stick doesn't show that I have an abnormally high amount of fluid.
Prior to posting this morning I read the touch control section of the manual and searched other threads here. Seems any air leak into the hydraulics will make this whining happen. This morning I started Betty and let her warm up a bit. No whining. I then took the reservoir filler lug off and the whine started immediately. I cycled the touch control about twenty times to bleed the system and make sure the fluid level was where it should be. Seemed good. Put the plug back on. I let it run for about twenty minutes and the whine started again. Note also that the whine stops when I move the touch control and then starts when it has completed its movement.
My questions:
1) Where would the most likely leak be? We only removed the rear hydraulic lines to the case and used a new gasket.
2) Also seems as though the blade will raise three times as fast as it lowers. What would cause that?
Thank you in advance for your assistance!
Calvin