Mobile crane drawing
Mobile crane drawing
(OP)
See red arrow. Anyone know what the symbol is. The component is connected to a block valve.
The drawing is from an mobile crane my friend bought second hand a few weeks ago. The first owner lost part of the manual.
The drawing is from an mobile crane my friend bought second hand a few weeks ago. The first owner lost part of the manual.





RE: Mobile crane drawing
The incomplete rectangle marked 160l is a nonstandard way to show a reservoir.
They may, or may not, be the same physical reservoir.
The phantom line around the block valve and second reservoir may suggest that 'CE' is some kind of option.
The system appears to be an open center system, where the pump runs continuously at full output, and its flow is diverted to the various functions as they are needed.
The 3 port valve at lower left blocks all mechanisms for transport. I'm not sure how the 'CE' block interacts with that, perhaps to drain the system?
Mike Halloran
Pembroke Pines, FL, USA
RE: Mobile crane drawing
The 3 port valve at lower left block is to select extend/retract of outrigger beams of the mobile crane or for crane use.
RE: Mobile crane drawing
Mike Halloran
Pembroke Pines, FL, USA
RE: Mobile crane drawing
The solenoid valve in the CE block diverts the hydraulic oil to tank when all the DC valves in the valve block are in the middle position. That way the oil does not warm up as a result of continuously passing through the DC valve block.
Many thanks for your help.