Grab.

[woody paul]

Use farma crane today and noticed grab looses grip is there anyway of knowing if its the seal in ram or O ring in valve block.

[openspaceman]

6 minutes ago, woody paul said:

Use farma crane today and noticed grab looses grip is there anyway of knowing if its the seal in ram or O ring in valve block.

Just disconnect the hose from the rod side of the ram at the valve and put it back into the tank. Then run the machine and grab a log, if hydraulic oil continues to run then a  seal is leaking.

 

With a continuous rotator there can be internal leaks between services

 

There are no seals or O rings between services in a spool, it is just a good fit and will wear prematurely  if the oil gets hot or filtration fails,

[GarethM]

Is it a one piece valve block or slice type, if it's slice swap functions and see if it still bypasses. Low tech but seals are cheaper than a new valve block

[woody paul]

It's the block type. 

Edited April 29, 2023 by woody paul

[GarethM]

Is the grab on quick disconnects ?.

 

Open the grab disconnect and leave for a day, if you come back and it's closed its bypassing the seals.

[woody paul]

No it's not on quick disconnect. 

[woody paul]

19 hours ago, openspaceman said:

Just disconnect the hose from the rod side of the ram at the valve and put it back into the tank. Then run the machine and grab a log, if hydraulic oil continues to run then a  seal is leaking.

 

With a continuous rotator there can be internal leaks between services

 

There are no seals or O rings between services in a spool, it is just a good fit and will wear prematurely  if the oil gets hot or filtration fails,

So took pipe off bottom of rotator which goes to rod end, when I grab piece of wood tighter had oil coming out of pipe but also out of outlet on rotator, I take it that is a single port drill through centre of pin and pressure works it out. 

[GarethM]

Is it a rotator or a hydraulic ram ?.

As I'm not sure if a rotator is just a fancy downsized hydraulic pump, so it would flow through as it turns.

 

If that's what it is then if the seals have failed it would bypass more than normal causing less power.

Edited April 29, 2023 by GarethM

[openspaceman]

When the log is grabbed the rod side is dumped to tank. As the rotator has cross line relief it also is dumping to tank the leak from the now open rod side hose may be just an artifact of the back pressure in the system being higher than atmospheric pressure rather than a failure in the rotator.

 

Solve one problem at a time, oil is leaking past the grab ram piston seal.

[openspaceman]

4 hours ago, woody paul said:

I take it that is a single port drill through centre of pin and pressure works it out. 

I don't understand this bit