AntrimMan
Gold Member
Guess what's missing in the photo.
I've lost use of the dipper on my BH90. The machine, purchased in Dec. '03, has 190 hours on the clock, about 2/3 of which is fairly hard hoe use.
A call to the dealer didn't help , the fellow I wanted to speak with is on vacation. The sales person ballparked me 3.5 hours + parts to reseal and approx $600 for a new cylinder assembly, I wonder if he can still hear me laughing.
The hoe warranty period has expired and my question concerning a cylinder recall was dismissed. When I asked about just buying a seal kit I was warned that special tools were needed to properly insert the seal. Listen here fellas, my people built the unsinkable Titanic, so there is no reason for me to be afraid of fabing a seal guide. Even the lovely missus thinks I can do it. It just won't be iceberg proof.
I isolated and capped the cylinder ports and I can pull/push the dipper in either direction by hand, it even moves by itself like a pendulum when I move the boom. The oil is freely moving past the piston seal. Problem potentially identified.
When I took the cylinder pins out I found why it failed.
There is a tremendous side load applied to the cylinder because of misalignment between the boom and dipper pin bores. I designed and built custom high speed assembly equipment for ten years and side loads mean early death for cylinders. I may be able to correct this by relieving the cylinder or altering the mounting gap as long as the pin bores are reasonably parallel, I will check the pin bores to rod and bore perpendicularity when dissassembled. The boom and bucket cylinders suffer the same side load so I took them off also and will reseal and make corrections as needed.
This hoe was never heavily side loaded by impact, I bought it new, I'm the only user, so I highly suspect it was delivered in this condition.
I haven't opened the cylinders up yet but I won't be surprised if the bores are scored beyond utility.
I'm less than happy with Kubota at present, last week I was full of praise, so there you go. When asked for an opinion, I will soon be able to say my BH90 is between repairs.
So here are my questions, tendered to the great wealth of information available here on TBN...
Is Tractorsmart the smartest place to purchase repair parts?
Has anyone found special assembly tooling necessary for BH90 cylinders?
TIA,
Martin
I've lost use of the dipper on my BH90. The machine, purchased in Dec. '03, has 190 hours on the clock, about 2/3 of which is fairly hard hoe use.
A call to the dealer didn't help , the fellow I wanted to speak with is on vacation. The sales person ballparked me 3.5 hours + parts to reseal and approx $600 for a new cylinder assembly, I wonder if he can still hear me laughing.
The hoe warranty period has expired and my question concerning a cylinder recall was dismissed. When I asked about just buying a seal kit I was warned that special tools were needed to properly insert the seal. Listen here fellas, my people built the unsinkable Titanic, so there is no reason for me to be afraid of fabing a seal guide. Even the lovely missus thinks I can do it. It just won't be iceberg proof.
I isolated and capped the cylinder ports and I can pull/push the dipper in either direction by hand, it even moves by itself like a pendulum when I move the boom. The oil is freely moving past the piston seal. Problem potentially identified.
When I took the cylinder pins out I found why it failed.
There is a tremendous side load applied to the cylinder because of misalignment between the boom and dipper pin bores. I designed and built custom high speed assembly equipment for ten years and side loads mean early death for cylinders. I may be able to correct this by relieving the cylinder or altering the mounting gap as long as the pin bores are reasonably parallel, I will check the pin bores to rod and bore perpendicularity when dissassembled. The boom and bucket cylinders suffer the same side load so I took them off also and will reseal and make corrections as needed.
This hoe was never heavily side loaded by impact, I bought it new, I'm the only user, so I highly suspect it was delivered in this condition.
I haven't opened the cylinders up yet but I won't be surprised if the bores are scored beyond utility.
I'm less than happy with Kubota at present, last week I was full of praise, so there you go. When asked for an opinion, I will soon be able to say my BH90 is between repairs.
So here are my questions, tendered to the great wealth of information available here on TBN...
Is Tractorsmart the smartest place to purchase repair parts?
Has anyone found special assembly tooling necessary for BH90 cylinders?
TIA,
Martin