SETUP AND INSTALLATION 2250 OPERATOR MANUAL
4-68
Published 06-24-16, Control # 241-01
3. Slowly raise the gantry until the lower tray contacts the
bottom of the center box (Figure 4-32
, View A). Remove
the pins connecting the center box to the lower tray.
4. Lower the gantry until the counterweight is on the
ground and the lifting links are loose in the slots. Unpin
the lifting links from the lifting frames (Figure 4-35
, View
F).
5. Attach the lifting pendants, stored on the side of the
center box, to the lugs on the gantry (Figure 4-35
,
View H).
6. Disengage the lower counterweight attaching the pins
(Figure 4-35
, View A).
7. Raise the gantry and the center box until the upper
counterweight is supported by the lifting links and the
upper attaching pins are loose in the slots (Figure 4-35
,
View A).
8. Disengage the upper attaching pins (Figure 4-35
, View
A).
Keep the pins disengaged until the center box is clear
from the rotating bed.
9. Lower the gantry until the center box is on the lower tray
and the lifting pendants are slack.
10. Unpin the lifting pendants from the gantry and store
them on the center box (Figure 4-32
, View A).
11. Raise the lifting links and store them on the gantry
(Figure 4-35
, View H).
12. Fully raise the gantry. See Gantry Raising and Lowering
(with Boom Butt Handling Cylinder) on page 4-50.
Counterweight Disassembly
Disassembly is the opposite of assembly.
The lifting frames can be stored for shipping on the lower tray
after the side counterweight boxes are removed:
1. Support the lifting frame with an outside assist.
2. Remove the two inside pins from the lifting frame (store
the pins in lugs on the lower tray).
3. Lower the lifting frame (toward outside) onto the lower
tray.
4. Repeat these steps for the other lifting frame.
DRUM 5 INSTALLATION AND REMOVAL
Drum 5 is used as the luffing hoist or as an auxiliary drum.
The drum is mounted on the front of the adapter frame.
Drum 5 Installation
See Figure 4-37 for the following procedure.
1. Attach the owner-furnished nylon lifting slings from an
assist crane to drum 5.
2. Lift the drum so it is balanced in the lifting slings.
3. Remove pins (2), screws with lock washers (3), and
spacers (4) from storage on the drum.
4. Lift the drum into position at the front of the adapter
frame (1).
5. Align the mounting holes and install the pins (2).
6. Install the spacers in the top mounting holes in the
adapter frame.
7. Apply Loctite® #271 to the threads of the screws.
8. Install the screws with lockwashers.
9. Tighten the screws to 244 Nm (180 ft-lb).
10. Connect the electrical cable (6) from the adapter frame
junction box to the encoder (7) on the left end of the
drum.
• Remove the dust caps from the plug and receptacle.
• Thoroughly clean all dirt and moisture from the plug
and receptacle before connecting.
11. Connect two air lines (8a and 8b) from the adapter frame
to the drum pawl cylinder (9).
• Thoroughly clean all dirt and moisture from the air
line fittings before connecting.
• The top port of the cylinder is pawl IN (engaged).
• The bottom port of the cylinder is pawl OUT
(disengaged).
12. Connect five hydraulic hoses (10a, 10b, 10c, 10d, and
10e) between the adapter frame and the drum.
• Remove the dust caps from the couplers and
nipples.
• Thoroughly clean all dirt and moisture from the
couplers and nipples before connecting.
13. Start the engine and check drum 5 for proper operation.
Do not put the drum into service until any faults are
corrected.
Drum 5 Removal
See Figure 4-37 for the following procedure.
1. Spool the wire rope onto the drum and secure it.
2. Reverse the installation steps to remove the drum.
3. Store the pins (2) in the brackets on the side of the drum.
4. Store the screws with lockwashers (3) and spacers (4) in
the holes in the drum.
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