The B3030 has been running issue free since 2006 and I just did the 900 hr Hydraulic Fluid and Filter change. Using standard UDT and Baldwin Filters. Now, when I start up I have zero hydraulic pressure for first three minutes then it slowly starts to come back. Pump sounds a bit noisy. After 5 or 6 minutes FEL and power steering are almost back to normal and hydrostatic is working although noisy. Level just over top line on dipstick, no air bubbles seen after running 10 minutes. I'm a decent wrench guy but no hydraulic experience so I'm at a loss to explain. I'm sure someone here can nail this down in short order. Should mention I started out trying to save $50 and put in Mobil Delvac fluid (UDT compliant), thought that was the issue, so drained and donated to town DOT (they burn waste oil to heat) and put in UDT. So instead of saving $50 I burned $50.
UPDATE: Replaced the Baldwin Filters and problem resolved - back to quiet pump and HST with full pressure for FEL and Pwr Steering (as it always has been). So instead of saving $65 on Delvac Fluid and Baldwin Filters over Kubota, I ended up spending an extra $85 for the Delvac and Filters I couldn't use (Kubota UDT and FIlters locally were $150). Probably could have used the Delvac since it was a Filter issue (large 37712 on right attached to pump input line) but learned my lesson and will replace with 'bota next time as well. Only thing I don't use that's Kubota is the Fuel Filter - stupid expensive so I replaced entire fuel filter assy with a Raycor and love it.
On a side note, when I went to replace the right drain bolt on the axle case, as I barely started to tighten it up it popped out with the case threads in the bolt threads. Must have been a soft spot in the aluminum. Had to drill and tap for a larger bolt. Tap went through like butter. I loaded the bolt up with blue locktite and gently torqued it on.
UPDATE: Replaced the Baldwin Filters and problem resolved - back to quiet pump and HST with full pressure for FEL and Pwr Steering (as it always has been). So instead of saving $65 on Delvac Fluid and Baldwin Filters over Kubota, I ended up spending an extra $85 for the Delvac and Filters I couldn't use (Kubota UDT and FIlters locally were $150). Probably could have used the Delvac since it was a Filter issue (large 37712 on right attached to pump input line) but learned my lesson and will replace with 'bota next time as well. Only thing I don't use that's Kubota is the Fuel Filter - stupid expensive so I replaced entire fuel filter assy with a Raycor and love it.
On a side note, when I went to replace the right drain bolt on the axle case, as I barely started to tighten it up it popped out with the case threads in the bolt threads. Must have been a soft spot in the aluminum. Had to drill and tap for a larger bolt. Tap went through like butter. I loaded the bolt up with blue locktite and gently torqued it on.
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