GMT 050
User manual
11
An example of the drain valve installed nearby the main valve block.
Example of the drain valve installed
1)
T-coupling in grapple open (G.O.) hydraulic line/hose
2)
Drain valve for returning drain fluid directly to the hydraulic reservoir. Set at a flowrate of 5-6
l/min and installed with the marked port (T) towards tank.
3)
Ball valve
Open to operate the felling grapple. Close to operate a regular timber grapple.
The ball valve must be closed when work is going to be done with a regular timber grapple.
Please
note, for testing purposes:
When the felling grapple is placed in tilt-up position (position for vertical
felling) and no functions are activated, it must lower itself when grapple open input stops. This allows
the user to check whether the leaking oil valve has been attached correctly and/or whether the ball
valve has been opened.
4.5
Installation on Telehandler
When a rotating telescopic forklift is used which has only 1 double hydraulic function available a 6/2
valve should be installed on the jib. On this valve a different drain valve is installed (these valves are
not supplied standard with the GMT050) that will generated the second hydraulic double function. An
electric signal will take care of the controls for the second double function that is being created: the
rotation of the grapple.
The 6/2 valve and special valve mounted on a Jib