Backhoe questions.

Kytractor · May 9, 2004

I have the 509 bradco on my L3830 and it works great. No problems so far after one year.

txdon · May 9, 2004

Phatboy, The BH90 works too well on the 5030. I cannot use it at the rated RPM and have to throttle down my RPM because it moves so quickly, so I think the lower GPM pump would do just fine. The BH90 can lift and pull the 5030 around. The BH90 frame goes along the sides and connects to the FEL and is not compatible with mid mount mowers.

PhatBoy · May 9, 2004

( Digging force is a function of system pressure only. The speed at which you can articulate the backhoe is a function of pump displacement (ie: GPM). Also digging force increases and cylinder velocity decreases as cylinder size (cross sectional area) increases. )

So for a Bradco 509 vs a BH90 on a L5030, the 509 will have 45% more digging force with the bucket (5676 vs. 3871 lbs.)? That is significant.

Implement pump pressure is not listed for the various L30s. I am assuming that it increases as one moves up the model line, but I don't know. I am still uncomfortable with how much harder a subframe mounted BH works on anything over say a L3830. Faster, yes. But more digging force?

( To my knowledge the BH90B operates via a PTO driven pump. )

According to the brochure, the BL4690B 7.5' uses a PTO pump. The BH90 9.0' is operated by the tractor hydraulics. The BH90 I looked at was going into the hydraulics.

Thanks for all the feedback /forums/images/graemlins/smile.gif

PS. LarryRB, if you're still reading this, I understand you are selling your Mahindra with the Bradco 511. Are you replacing it with a Kubota?

uhmgawa · May 9, 2004

( So for a Bradco 509 vs a BH90 on a L5030, the 509 will have 45% more digging force with the bucket (5676 vs. 3871 lbs.)? That is significant.)

The other issue is to determine if there are multiple pin locations
for the bucket linkage . Some mechanisms have a 'power' pin location
which yields increased digging force at the expense of bucket rotation.
If either backhoe has multiple pin locations you may want to
ascertain what 'digging force' is given in which configuration.

( Implement pump pressure is not listed for the various L30s. I am assuming that it increases as one moves up the model line, but I don't know.)

It varies somewhat. However there are practical limitations of using
standardized hydraulic components which have roughly equivalent
working pressures. Most system pressures are in the 2500PSI +/-
ballpark. What you typically find as you compare to larger machines is
a significant increase in pump displacement (GPM).

( According to the brochure, the BL4690B 7.5' uses a PTO pump. The BH90 9.0' is operated by the tractor hydraulics. The BH90 I looked at was going into the hydraulics.)

So it would appear the BH90B [B-version] adds the PTO pump.
Guess it was added for a reason. Both the BL4690A and unfortunately
defunct BL4560 were PTO pump driven.

txdon · May 9, 2004

So for a Bradco 509 vs a BH90 on a L5030, the 509 will have 45% more digging force with the bucket (5676 vs. 3871 lbs.)? That is significant.


That is significant. For every force there is a opposite force and as long as that force can be directed to the ground as in the curl of the bucket under a stump instead of to the tractor, where it would only move the tractor around, it would be useful. /forums/images/graemlins/cool.gif

RayH · May 10, 2004

Ahhh, Someone please tell me that Kubota isnt offering a BH90 with its own hydraulics yet. I juast got a BL4690 for my L3130 because of the self contained hydraulics. I was affraid the GPMs werent enough from the L3130 to operate the BH90 smoothly without running at red line all day.
When I got the BL4690 a few months ago, my dealer said Kubota was looking at adding a pump to the BH90 but it wouldnt be til next year.

Edit: I paniced and had to check Kubotas site real quick. It says the BH90B uses tractor Hydraulics. I think someones got bad info.

uhmgawa · May 10, 2004

( Edit: I paniced and had to check Kubotas site real quick. It says the BH90B uses tractor Hydraulics. I think someones got bad info. )

Sorry to panic you -- my mistake. I just rechecked the page I originally
misread and indeed the BH90B is still driven via tractor hydraulics.

The thing which irked me about the L4650 dying off and the BH90
taking it's place is the sticker price was about the same. Delete the
PTO pump and self-contained hydraulic system and Kubota pockets
the difference. Then again trying to get accurate pricing information
from local dealers is about as effective as using a ouija board to do the
same.

LarryRB · May 10, 2004

Phatboy
I sent you some PM's,, did they go through?

AndyR · May 15, 2004

Daryl - chek out the BH mount pictures I just posted in the "Cabalicious L5030" thread. I don't know what the differences are between the BH90 and the Woods 9000 but the basic idea looks like it would work with minor modifications.