Grove RT9130E - Boom Disassembly

Published 08-25-09, Control # 077-04 4-7
RT9130E SERVICE MANUAL BOOM
4
GROVE
15. Remove the capscrews and lockwashers from the two
pivot lock weldments that retain the pivot shafts to the
boom and the turntable weldment. Remove the hoses
from the counterweight removal cylinder, and match up
the quick disconnects of the hoses to the disconnects on
the pivot shaft removal cylinder. Activate the cylinder to
pull the pivot shafts inward, to clear the bushings in the
turntable weldment and in the boom.
16. Raise the boom clear of the crane and lower to ground
and set cribbing to support the boom and prevent
tipping.
Boom Disassembly
NOTE: Boom assembly illustration shown in (Figure 4-2)
1. Remove the boom in accordance with the REMOVAL
procedures outlined in this section.
2. If necessary, on the left side of the boom remove the two
bolts and washers securing the LMI cable angle
brackets to the base, inner mid, center mid, and outer
mid.
NOTE: The boom weighs approximately 15420 kg (34,000
pounds). The above weight is for the boom without
the swingaway boom extension attached.
3. On the top front of the base section, remove the
capscrews, washers, nuts and three cable pads.
4. Repeat step 3 on the inner mid, removing three cable
pads.
5. Repeat step 3 on the center mid, removing two cable
pads.
6. Repeat step 3 on outer mid, removing two cable pads.
7. On the top front of the base section, remove clip pins
washers and the cable guide assembly.
8. Remove the capscrews, washers and the tele lock plate
from the lower telescope cylinder.
NOTE: The combined weight of the boom inner mid, center
mid, outer mid, and fly sections, including the
telescope cylinders, is approximately 11,882 kg
(26,200 pounds).
DANGER
Shut down the crane before proceeding.
DANGER
The boom assembly must be rotated 180° (upside down)
before performing any assembly or disassembly
procedures.
DANGER
A rollover fixture with webbing is recommended to rotate
boom and sections. Chains are not recommended. If a
rollover fixture is not available, rotate sections using
adequate support with webbing.
DANGER
A secure fixture that will prevent damage to the boom is
recommended to stabilize and hold the boom from moving
during removal of section or sections.