47
Models
Revision 03-2012
Toucan 1210
Toucan 1310
HYDRAULIC SYSTEM
3
3
3.17 Sequence valve
F
UNCTION
:
Authorizes the counterbalance valve on the
jib cylinder (jib lowering) to be piloted only once the
necessary pressure in the chambers of the slave and
assistance cylinders has been reached (necessary
pressure to keep the work platform with its load
horizontal during the jib lowering movement).
Decompression of the counterbalance valve pilot
circuit is performed through the check valve
incorporated to the valve.
Control of the sequence valve setting
- Connect a pressure gauge on the pressure plug
"M" on the function manifold (see § 3.4).
- Fully raise the jib, telescope retracted.
- Position the speed adjustment potentiometer
on minimum and lower the jib. The jib should
start to lower only when a pressure of 12 ± 0,5
MPa (120 ± 5 bar) is reached.
3.18 Slewing hydraulic motor
1.
Hydraulic motor 32 cc/rev.
2.
Pressure relief valve [PR9] (slewing to the right)
3.
Pressure relief valve [PR10] (slewing to the left)
Pressure relief valves setting :
see § 3.19.
1
2
