Grove toucan 1010, Service Manual

Page: 24 / 73

Toucan 1010
Models
Revision 02-2000
24
3.4 Counterbalance valves setting
- Mast/jib cylinder counterbalance valve.
The valve opening pressure is factory pre-set at 210
bars at 4 l/mn. This setting must not be modified.
- Drive manifold counterbalance valve.
Counterbalance valve
drive forward
Counterbalance
valve
drive reverse
The counterbalance valves on the drive manifold
ensure dynamic braking for the work platform.
The more the setting screw is tightened, the sharper
the braking is.
Setting must be performed with the rated load (200 kg)
evenly distributed in the platform.
The counterbalance valves must be set so that :
- When the work platform is driven at its
maximum speed (3rd gear), it must stop over
a 0.8m to 1m distance on flat ground (in both
forward and reverse) when the joystick is
returned to neutral.
- When the work platform is driven directly up or
down a 15% slope in 2nd gear, it must stop
over a distance inferior to 1m when the joystick
is returned to neutral.
Function Relief Pressure Relief Valve Check Port "M" on
Main pressure 230 bar PR1 Function manifold
Right swing 60 bar PR2 Function manifold
Left swing 60 bar PR3 Function manifold
Mast elevation 170 bar PR4 Function manifold
Jib elevation 120 bar PR5 Function manifold
Jib lowering 50 bar PR6 Function manifold
Manual brake release
Max. pressure 35 bar
max. peak pressure
PR7 Brake manifold
Drive at low speed 80 bar PR8 Function manifold
RELIEF VALVE PRESSURE SETTINGS
PRESSURE SETTINGS 3 3