OPERATION
3200 SERIES OWNER’S MANUAL
TASK PERFORMANCE
1.
Position the 3200 crane as close to the job as possible on a firm, dry, and level surface. Avoid overhead
obstruction on the work side of the unit.
2.
Set the parking brake.
3.
Extend and lower the outriggers until firm ground contact is made. On soft ground, use bearing pads to
prevent sinking or tipping.
4.
Run the winch line out before extending the boom.
5.
Make sure the connection to the load is secure and will not come loose when lifting the load.
OVERLOAD PROTECTION
The 3200 crane is equipped with a counterbalance valve inside the lift cylinder to protect against overloading. In
an overload condition, the boom will not elevate. Attempts to winch the load will cause a downward feathering of
the boom until the overload condition is reduced. The counterbalance valve will also keep the boom from coming
down in the unlikely event of a rupture to the hydraulic hoses that supply oil to the lift cylinder.
A pressure sensitive switch is located in the lifting cylinder. It can sense an overload situation. This causes a
shutdown of the winch up, boom extension out, and boom elevation functions, and automatically resets after the
crane has been moved out of the overload position.
An anti-two block feature is provided on the LRX models, and optional on all others.
RELIEF VALVES
The 3200 crane has a relief valve located on the hydraulic power unit. This is the main system relief. It is factory
set at 2550 PSI. The main function of this relief valve is to prevent overloading of the system if the boom is
inadvertently rotated against an immovable object, while one of the other hydraulic functions is also being used.
The relief valves would not normally require adjustment, but if the correct relief valve setting is suspect, refer to
the maintenance section of this manual for the proper adjustment and testing procedure.
9
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