Ever fully closed a grapple in a D?

[y3ll0w]

Got to demo a D series and when the dealer was showing me how to close the grapple the front hydraulic block cracked and begain to leak. The dealer said the D series will do that if the hydraulic system under pressure for too long. After the grapple was closed he kept the hydraulics on for about a 10th of a second. (reaction time to see/feel the grapple was closed)

That killed the idea of a TC right there....

...Unless the dealer is wrong.

 

[y3ll0w]

Just to be clear the leak was not something that stopped when the hydraulic system was shut down. During the fraction of a second it took him to shut off the hydraulics to the grapple a hydraulic hose fitting cracked and the hydraulic distribution block on the loader arm also cracked. The sales man said it would be a couple of hundred dollars just in parts and it was due to the fact that bobcat changed the design of the D and this system was one of the changes.

 

[trlbrkr]

I have the utilityfork on my D
Utility Fork Grapple Attachment - Bobcat Company
-- after spending the morning working with manure - brush and holding the hydraulics open and closed I had no problems?
I wonder if the salesman had it in high flow?
The hydraulics on this machine are great,,from the dripless flat face fittings that are a easy to connect, even after an implement has been sitting in the hot sun. The dump and bucket are powerful at idle with full loads..I am impressed

 

[y3ll0w]

That is the exact attachment, it was not in highflow mode. I knew he had to be wrong.

 

[radman1]

Just to be clear the leak was not something that stopped when the hydraulic system was shut down. During the fraction of a second it took him to shut off the hydraulics to the grapple a hydraulic hose fitting cracked and the hydraulic distribution block on the loader arm also cracked. The sales man said it would be a couple of hundred dollars just in parts and it was due to the fact that bobcat changed the design of the D and this system was one of the changes.

That is the craziest statement I have heard. No way would anyone design a hydraulic system that would self-destruct just because the hydraulic was left on too long. Relief valve should take care of that issue. That is why they have max psi settings of 3000 and "not until it breaks." It does seem weird why 2 different areas both had problems. Defect in the hydraulic system or relief valve? It would be nice to measure what the hydraulic pressure is in the system on that unit.

 

[jmfox]

The dealer said the D series will do that if the hydraulic system under pressure for too long.

This is the comment that needs to be flushed out.

jmf

 

[theoshin]

this is crazy. no hydraulic system is engineered this way.

 

[IslandTractor]

Find another dealer. Do you really want to buy a 40K+ machine from someone with such a poor understanding of hydraulics?

 

[jmfox]

the front hydraulic block cracked and begain to leak.

I'm not sure you can blame the dealer for a cracked block or disclosing his experience. What the dealer maybe saying is that certain parts, e.g. a hydraulic block, are unique to the TC and tend to fail under normal use. Defects are not designed they are unfortunate surprises that need to be fixed.

jmf

 

[y3ll0w]

That is the craziest statement I have heard. No way would anyone design a hydraulic system that would self-destruct just because the hydraulic was left on too long. Relief valve should take care of that issue. That is why they have max psi settings of 3000 and "not until it breaks." It does seem weird why 2 different areas both had problems. Defect in the hydraulic system or relief valve? It would be nice to measure what the hydraulic pressure is in the system on that unit.

The salesman made it sound like this is how all machines are made. "you just have to be careful"

I also called the service dept. and they guy I spoke with also supported the salesman's statement that you cannot keep the hyd. on for very long at all.

Perhaps there is a problem with a few of these newer machines?