Manitowoc 2250 MAX-ER 2000, Руководство оператора

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Reference
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Manitowoc
Published 01-08-13, Control # 049-05
3-3
2250 MAX-ER 2000 OPERATOR’S MANUAL OPERATING CONTROLS AND PROCEDURES
3
GENERAL INSTRUCTIONS
The instructions in this section supplement the operating
control instructions in your Crane Operator’s Manual. This
section also contains operating precautions.
This section has two purposes:
• To familiarize qualified operators with the location and
operation of s pecific c ontro ls used for MAX-ER
operation.
• To alert operators to important safety information.
If the MAX-ER is equipped with a luffing jib, see the
Operation Guide in the Luffing Jib Operator’s Manual for
identification and operation of the luffing jib controls and
additional operating precautions.
COUNTERWEIGHT
See Figure 3-3, View E in this section and the MAX-ER
Capacity Charts for counterweight identification and
requirements.
See the Crane Operator’s Manual and section 4 of this
ma nu al fo r c o un te rw e i gh t ins talla tio n an d re mo v al
instructions.
PRINCIPLES OF OPERATION
When the MAX-ER mode is on:
• The load sensing pin in the gantry backhitch (left side)
measures backhitch loading created by the lifted load.
• The load sensing pin sends a proportional voltage to the
programmable controller.
• The programmable controller activates the crane’s
electric and hydraulic systems to automatically extend
and retract the counterweight cylinders (raise and lower
wheeled counterweight assembly) in response to
changes in backhitch tension as indicated in Table 3-1.
Table 3-1 Counterweight Cylinder Operation
WARNING
Prevent Death or Serious Injury to Personnel!
MAX-ER attachment must be installed and operated by
experienced personnel trained in erection and operation
of construction cranes. These personnel shall read,
understand, and comply with instructions in this manual,
in Crane Operator’s Manual, and in MAX-ER Capacity
Charts.
WARNING
Tipping Hazard!
Tipping can occur if too little counterweight is installed.
Structural damage can occur if too much counterweight is
installed.
D o n o t o p e r a t e c r a n e w i t h M A X -E R u n t i l p r o p e r
counterweight is installed.
Backhitch Load
U.S. Tons
Counterweight
Cylinders
Trailer
30 Retract Raise
28
Stop Raising
1
< 4 Extend Lower
6 Stop Lowering
1
Cylinders stop retracting when limit switch at left cylinder is
contacted.
If tray gets more than ±4° out of level, automatic cylinder
control shuts-off. Re-level tray manually with remote
controls (MAX-ER mode off.)