rswyan
Super Star Member
- Joined
- May 12, 2004
- Messages
- 13,184
- Location
- Northeast Ohio
- Tractor
- Kubota B2910, Cub Cadet Pro Z 154S, Simplicity 18 CFC, Cub Cadet 782
Does your Dipperstick/Crowd circuit seem painfully slow ?
Are you tired of having to run your engine at near PTO rpm to achieve minimally acceptable performance, due to a seemingly poor choice, on Kubota's part, of the supplied PTO pump for your backhoe (..... or just the ill-advised inclusion of a restriction orifice where it isn't really needed ?)
If so, there may be a simple solution.
After renting a U17 (zero-tailswing) mini-ex a couple of weeks ago I was reminded of how painfully slow certain aspects of my BH4690B back are, in comparision. Kubota's mini-ex's are really a joy to use - sure wish the same was the case for their backhoes for CUT's ....
Yesterday I had to install my BH4690B and do some trenching that I wasn't able to get done when I had the mini-ex. After using it for about an hour and being driven nearly bonkers with how slow the dipperstick/crowd circuit was I remembered that in looking at the parts manual at some point I had seen some restriction orifice plates ..... checking the parts manual again I found that there indeed was a total of 4 of them listed:
1 for the boom/lift circuit (which has always seemed plenty fast enough for me at most any engine rpm)
2 for swing circuits (also plenty fast enough)
and 1 for the dipperstick/crowd circuit
The attached photo shows the parts manual with the dipperstick/crowd circuit circled in red - and is marked as item no. 003:
Are you tired of having to run your engine at near PTO rpm to achieve minimally acceptable performance, due to a seemingly poor choice, on Kubota's part, of the supplied PTO pump for your backhoe (..... or just the ill-advised inclusion of a restriction orifice where it isn't really needed ?)
If so, there may be a simple solution.
After renting a U17 (zero-tailswing) mini-ex a couple of weeks ago I was reminded of how painfully slow certain aspects of my BH4690B back are, in comparision. Kubota's mini-ex's are really a joy to use - sure wish the same was the case for their backhoes for CUT's ....
Yesterday I had to install my BH4690B and do some trenching that I wasn't able to get done when I had the mini-ex. After using it for about an hour and being driven nearly bonkers with how slow the dipperstick/crowd circuit was I remembered that in looking at the parts manual at some point I had seen some restriction orifice plates ..... checking the parts manual again I found that there indeed was a total of 4 of them listed:
1 for the boom/lift circuit (which has always seemed plenty fast enough for me at most any engine rpm)
2 for swing circuits (also plenty fast enough)
and 1 for the dipperstick/crowd circuit
The attached photo shows the parts manual with the dipperstick/crowd circuit circled in red - and is marked as item no. 003:
