Possible Fix for BX 50 Series Abrupt Reverse Stop?

[ejnichol]

Thavil,


It will be remedied in this fashion;

If the last 1/8" - 1/4" of travel on the HST pedal linkage can be buffered with an external hydraulic dampener as it returns from reverse to neutral, the problem will be resolved.

The dampener serves only as a shock absorber and needs minimal, though adjustable, ability. It will come into play only upon "contact" in the above noted range and will not affect any other range of travel, or ability of the HST - forward or reverse.

Dave

You're on target about needing a damper. If you slowly let your foot off the reverse pedal the abrupt stop doesn't occur.

Another poster made observation about released forward pedal slowly returning to nuetral whereas released reverse just about flops back to neutral.

Seems a damper may do it but it would need to be a self nuetralizing sort of spring type damper that brings return pedal to neutral in a controlled but consistent manner.

Kubota not a very customer focused company at least for those of us who purchased their small tractors.

 

[catawampus]

I have not personally verified that the BX25 does not exhibit this problem behavior, but I have read elsewhere and been told by a dealer that the BX25 works flawlessly in rerverse. I decided to do some investigation by comparing parts diagrams from both machines and I have some good news.

There is no question that the design of the HST speed control linkage and damper is markedly different, but is still using the exact same design on either side of the linkage. In other words, we should be able to purchase the necessary parts and install them on a BX24 without issue. I encourage you to investigate yourself before running out and purchasing the parts, but I am convinced enough that I will be buying the following bits from tractorsmart.com next week for about $150. You can also get the parts diagrams yourself from tractorsmart.com and do your own investigation.

$14.95 K2651-42044 Link Pedal HST
$7.35 K2651-42140 Arm
$0.70 K1122-91330 Short Square Bolt x 2
$2.70 02751-50080 Nut Flange x 2
$11.05 K2651-42172 Rod Speed Change
$74.95 32721-43350 Damper HST
$14.70 K2651-42130 Stay
$0.65 05112-50825 Pin Joint
$1.20 K1211-91120 Rue Ring Cotter x 3
$8.10 K2571-43424 Lock Cruise
$8.10 K2581-43414 Arm Cruise

 

[catawampus]

OK so I have spoke a little too soon on this. It appears that significant changes were made to the HST itself too. Nothing that would appear to preclude a BX24 from still using the BX25 linkage and damper, but they may alone not be responsible for elimination of the problem. The bad news is that parts of the HST are significantly more expensive and require the opening of the transmission case, more or less major surgery. I am still going to try the linkage just to see if there is major improvement.

I forgot to indicate on my last post that the front pedal also seems to be different, but I cannot tell what the significance of the changes are.

The new part number for the pedal is K2581-42114 PEDAL HST FRONT.

 

[MessickFarmEqu]

We've tried damper solutions before, it does not change things.

 

[catawampus]

When you say you have tried damper solutions, are you saying that you have replaced the linkage and damper on the BX24 with the linkage and damper from the BX25 with no improvement. I would imagine that the only reason that Kubota would completely redesign the linkage and damper would be to improve this issue, seeing as how everything on either side is essentially the same design. I do acknowlege that there are some difference with the HST as well, but I find it somewhat hard to believe that the redesign would make no difference even without the HST changes.