OPERATING CONTROLS AND PROCEDURES 18000 OPERATOR MANUAL
3-66
Published 12-05-17, Control # 032-23
When the MAX-ER mode is on:
• The load sensing pins (counterweight and mast)
measure backhitch tension created by the lifted load.
• The load sensing pins send a proportional voltage signal
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 counterweight
assembly) in response to changes in strap tension as shown
in Table 3-10
.
Table 3-10 Backhitch Tension Cylinder Response
Backhitch Tension
U.S. Tons
Counterweight
Cylinders
Counterweight
Carrier
50 Retract Raise
40
Stop Raising Tray
(Tray will also stop rising if limit switch
at either cylinder is tripped open.)
10 Extend Lower
15 Stop Lowering Tray
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