Models
Revision 03-2012
44
Toucan 1210
Toucan 1310
HYDRAULIC SYSTEM
3
3
3.16.3 Telescope cylinder
1.
Double effect cylinder Ø70-45 - stroke 1205 mm
2.
Dual overcenter valves
2a.
Counterbalance valve rod side
2b.
Counterbalance valve piston side.
Dual overcenter valves
F
UNCTION
:
- Load holding in the event of hose failure.
- Allows pressure relief in case of overload.
- Allows thermal expansion relief of the hydraulic
fluid.
Pilot ratio : 6,5:1.
Setting of the counterbalance valve (2a) rod side
- Lower the jib, telescope retracted.
- Fully tighten the valve setting screw.
- Place a 250 kg load evenly distributed on the
work platform floor.
- Slowly loosen the valve setting screw until the
telescope starts to extend, then tighten the
screw again by a 1 turn ½. Tighten the locknut.
Setting of the counterbalance valve (2b) piston
side
- Place a 250 kg load evenly distributed on the
work platform floor.
- Fully tighten the valve setting screw.
- Fully raise the jib. Extend the telescope by
approximately 50 cm.
- Slowly loosen the valve setting screw until the
telescope starts to retract, then tighten the
screw by a turn ½. Tighten the locknut.
1
2
3
1
2
3
Counterbalance valve
F
UNCTION
:
- Load holding in the event of hose failure.
- Allows pressure relief in case of overload.
- Allows thermal expansion relief of the hydraulic
fluid.
Pilot ratio : 2,5:1
Setting : 21MPa (210 bar) at 4 l/mn (Factory setting)
NOTE
The locknut must be tight to prevent any
external leak.
2a
2b
Torque value : 45 N.m
