SET-UP OPERATOR MANUAL NBT60L
4-28 Published 09-06-2019 Control # 691-01
9. Using counterweight control panel (Figure 4-16) located
on either side of superstructure, lower the counterweight
removal cylinders. For more information, see Lowering
the Counterweight Cylinders, page 4-24.
10. Attach removable counterweight to cylinders using
section attachment pins (6, Figure 4-20).
11. Using the counterweight control panel (Figure 4-16),
fully raise counterweight removal cylinders. For more
information, see Raising the Counterweight Cylinders,
page 4-24.
12. Adjust bolts (8, Figure 4-19) as needed to level the
counterweight and eliminate any relative motion
between the upper and lower counterweight. Tighten the
jam nuts (9) to lock the counterweights into position.
Stowing the Bottom Counterweight
1. Position crane on a firm, level surface.
2. Fully extend and set the outriggers, then level the crane
(see Setting the Outriggers, page 4-2).
3. (Optional) Set the camera display to view the rear view
camera as necessary.
4. Set display in Operator’s Console to the
RCL Operating
Mode Screen (Figure 4-19) (see
Section 7, Rated
Capacity Limiter
).
5. While watching the RCL display, rotate superstructure
so boom is over the rear of the crane and
counterweights are over the counterweight stowage
area. Pull the House Lock handle on the console to
engage the house lock. Using the house lock will assist
in aligning the counterweights. For more information,
see House Lock, page 3-13.
The Counterweight Removal Slew Position Indicator
(yellow arrows) (1, Figure 4-19) appears in the RCL
display, which indicates the rear of the superstructure is
nearly directly above the counterweight stowage area on
the carrier deck.
Ensure vertical alignment of counterweight to the
counterweight mounting lugs on the carrier deck or top
counterweight section to bottom counterweight section
with the optional rear view camera or by leaving the cab
and performing a visual inspection. If necessary, retract
the house lock and rotate the superstructure until
alignment is achieved.
6. Remove the superstructure pins (4, Figure 4-20) that
secure the counterweight to superstructure.
NOTE: It may be necessary to jog the cylinders up and
down to remove the superstructure attachment
pins.
7. It may be necessary to jog the cylinders up and down to
remove the superstructure attachment pins.
8. Using the counterweight control panel (Figure 4-16),
fully lower counterweight removal cylinders. For more
information, see Lowering the Counterweight Cylinders,
page 4-24.
9. Remove section attachment pins (6, Figure 4-20) that
secure removable counterweight to the top
counterweight.
10. Secure counterweight to the carrier deck with pins.
11. Fully raise cylinders, then stow the pins in the top
counterweight section.
DANGER
Ensure that all mounting pins are properly installed and
locked during and after operating the counterweight
removal system.
Clear all personnel from the counterweight and
superstructure area when mounting or removing the
counterweight(s).
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