Manitowoc National Crane NBT30H-2 Service Manual

ELECTRIC SYSTEM NBT30H-2 SERVICE MANUAL
3-4 03-20-2019 Control # 613-06
power supplied by the truck battery even when the truck
ignition is in the OFF position.
NOTE: The RCL display is not intended for frequent
removal as damage may occur to the electrical
connector. Removing the display will result in a
check engine light illuminating in the truck dash.
ANTI-TWO-BLOCK SYSTEM DESCRIPTION
The anti-two-block system (A2B) helps prevent damage by
sensing when the end of the hoist cable is near the boom tip
and disables the functions that cause a two block condition.
Normal functioning is restored by hoisting down or retracting
the boom until the A2B weight is suspended freely. The A2B
system is incorporated into the crane RCL system.
A2B Cable Repair
The A2B cable runs from the A2B reel through the boom to
the boom tip (Figure 3-2). To replace the A2B cable:
• Retract the boom.
• Run a small diameter rod from the front of the boom to
the back.
• Attach the cable to the rod and pull the cable through the
boom and secure the A2B cable to the boom tip.
FIGURE 3-1
8706-3
WARNING
Fall Hazard!
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations

Manitowoc National Crane NBT30H-2 Specifications

General

Brand	Manitowoc
Model	National Crane NBT30H-2
Category	Construction Equipment
Language	English