Backhoe / Hydraulics question

[dfkrug]

Oh, yeah, some b/hs have a special relief built into the
dipper stick valve for protecting it in just the situation you
describe. Curling the bucket with dipper fully extended.

 

[dfkrug]

Oh, yeah, some b/hs have a special relief built into the
dipper stick valve for protecting it in just the situation you
describe. Curling the bucket with dipper fully extended.

 

[Jay4200]

</font><font color="blue" class="small">( Oh, yeah, some b/hs have a special relief built into the
dipper stick valve for protecting it in just the situation you
describe. Curling the bucket with dipper fully extended. )</font>

My assumption was that when I'm generate full power using the bucket, the torque imposed on the dipper joint could greate pressures far in excess of pump pressure at the dipper cylinder - a blow-off valve would be prudent. Anyone know if Woods puts one of those in the BH9000?

I thought it might be indicative of blow-by, however, and the dipper is the weakest movement of the three. I guess that's why I asked. There shouldn't be air anywhere, since the BH has plenty of hours on it - although I suspect that the boom cylinder might. I noticed it making a jerky movement once - like it paused for a fraction of a second before moving. Since I haven't even had the opportunity to dig 9' straight down, the boom has never been fully extended.

Jay

 

[Jay4200]

</font><font color="blue" class="small">( Oh, yeah, some b/hs have a special relief built into the
dipper stick valve for protecting it in just the situation you
describe. Curling the bucket with dipper fully extended. )</font>

My assumption was that when I'm generate full power using the bucket, the torque imposed on the dipper joint could greate pressures far in excess of pump pressure at the dipper cylinder - a blow-off valve would be prudent. Anyone know if Woods puts one of those in the BH9000?

I thought it might be indicative of blow-by, however, and the dipper is the weakest movement of the three. I guess that's why I asked. There shouldn't be air anywhere, since the BH has plenty of hours on it - although I suspect that the boom cylinder might. I noticed it making a jerky movement once - like it paused for a fraction of a second before moving. Since I haven't even had the opportunity to dig 9' straight down, the boom has never been fully extended.

Jay

 

[CTyler]

We put in a drain tile last week and was digging as far down as it would go and in close to get the straight verticle for the drop pipe. I let off several times cause is was really pulling down on the curl and made me a tad nervous.

 

[CTyler]

We put in a drain tile last week and was digging as far down as it would go and in close to get the straight verticle for the drop pipe. I let off several times cause is was really pulling down on the curl and made me a tad nervous.