GMT 050
User manual
10
4.4
Installing the drain valve
At all times there should be a return-hose created to tank in order to have the tilt-down function
working properly. In order for the felling grapple to perform correctly, a drain valve must be attached
to the crane valve block of the carrying vehicle. This valve is supplied in a ready-to-use state in the box
containing tools and fittings.
Assembly of the drain valve as being supplied with the Grapple
The T-coupling needs to be mounted in the hydraulic line for grapple open near to the crane valve
block of the carrying vehicle. This new connection that has been created needs to go to the hydraulic
tank of the carrying vehicle. In this new line the ball valve and leaking oil valve must be mounted with
the ‘T’ side of the drain valve facing the hydraulic tank.
When a main manifold with a H-port connection in
neutral position is present on the carrying vehicle than
the drain valve is not needed to be installed.
See the hydraulic schematic as well in Hydraulic
schematic GMT050
Example of a GMT050 attached to a truck
