Counterbalance Valve Setting - JLG TOUCAN 1010 Service Manual

3
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.
Counterbalance valve
drive forward
- Drive manifold counterbalance valve.
Function
Main pressure
Right swing
Left swing
Mast elevation
Jib elevation
Jib lowering
Manual brake release
Max. pressure
Drive at low speed
22
PRESSURE SETTINGS
Counterbalance
valve
drive reverse
RELIEF VALVE PRESSURE SETTINGS
Relief Pressure
230 bar
60 bar
60 bar
170 bar
120 bar
50 bar
35 bar
max. peak pressure
80 bar
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 :
- W hen 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.
Relief Valve
PR1
PR2
PR3
PR4
PR5
PR6
PR7
PR8
T o ucan 1010
3
Check Port "M" on
Function manifold
Function manifold
Function manifold
Function manifold
Function manifold
Function manifold
Brake manifold
Function manifold
Model
Révision 04-2006