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TM 55-3810-306-15
11. Paint indelible match marks on the outside of the
center of gravity (c.g.), about 28 inches to the rear of the
turntable ring gear and carrier base plate. These match
center of rotation, connect each fall to a superstructure
marks will aid in remating the swivel assembly support
sling eye. (For superstructure sling eye locations, refer to
channel with the support lugs in the carrier frame. Place
the Shipping Data Plate or Transportability Data drawing
the swing lock in relation to the boom straight over front
(E6-829-008730). Hoist up to remove slack from the sling
position.
falls.) Remove bolts 7 and 2 (see figs 1 and 2), center the
12. Verify that slack is removed from the sling falls
boom over front, engage the swing lock, lower the boom
and that the apex is over the load c.g. (see 6 above).
to the horizontal position and turn off the engine.
Remove the final two bolts, 1 and 6 securing the swing
7. Disconnect the quick coupler provided in the lift-
bearing and ring gear to the carrier deck plate. Discard
retract circuit, located between the turntable side plates at
all forty of the swing bearing tie-down bolts and nuts.
the base end of the lift cylinders.  Breaking this line
(Remounting the superstructure will require all new 1-1/4-
effectively blocks any possible leakage past the lift control
inch-7 N.C. x 8-inch, GRD 8, bolts and nuts.) Retain the
valve spool, which would allow the boom to raise during
washers, if not damaged or deformed, for future use
superstructure demount.  Install dust caps or otherwise
when remounting the superstructure.
cover quick coupler ends to avoid dirt entering. Tie up the
13. Demount the superstructure, hoisting carefully to
loose hose assembly to prevent damage to the PAT
avoid damage to the swivel assembly and surrounding
electrical writing.
hoses.
NOTE
NOTE
Failure to break this line at the
Protect the turntable bearing ring and
disconnect may result in the boom
carrier deck plate machined surfaces
raising when the superstructure is
against  damage  and  rust  during
lifted.
separation.
8. Purge the air tanks.  Uncouple 5 air and 19
CAUTION
hydraulic quick disconnect fittings and 3 electrical conduit
The  crane  superstructure,  when
plugs on the underside of the swivel. Also, remove the
lowered to a flat supporting surface,
four 3/4-inch bolts, nuts and washers attaching the swivel
must be blocked about 26 inches
mounting channel to the crane carrier frame (see fig 1,
under the turntable bearing ring to
detail A). Save the bolts, nuts and washers for use in
protect the suspended swivel.  The
remounting the superstructure. Install dust covers on all
load  is  unstable  resting  on  the
quick disconnects.
bearing  ring  without  additional
supports and tiedowns. See figures
9. From underneath the crane, center line of rotation,
2-1 and 2-2 for locations of tiedowns
find the four swivel assembly suspension chains in their
and supports.
stowed positions snapped together around the swivel
barrel (see fig 1). Detach the chains from their stowed
For  semitrailer  or  rail  transport  of  the  crane
positions. The upper ends of these chains are secured to
superstructure and carrier, see the Shipping Data Plate,
the underside of the superstructure turntable base plate.
Engage the hooks on the lower ends of the chains in the
four eyes provided on the corners of the carrier swivel
Remount Procedure:
support channel.
10. Unpin and remove the two rotation links between
the turntable base plate and swivel barrel (see fig 1, detail
1. To unload the crane carrier and superstructure
A).
from  transport  vehicle,  top  lift  material  handling
equipment of at least 53,000-pound-capacity (26.5 tons)
is required. Forty, new 1-1/4-inch x 8-inch long, grade 8,
NOTE
bolts  and  nuts  are  required  for  remounting  the
Code mark these links so that they can
superstructure.  Use the eighty bearing bolt washers
be replaced in the same location at
saved at demount, step 12 above, unless damaged or
remount of the superstructure. Failure
deformed. Tool selection options from items 1 through 4,
to  do  so  will  result  in  rotary
above, for demount are required for the remount
misalignment of the swivel assembly.
procedure.
These links rotate the swivel barrel
with the turntable and are not designed
to accept the weight of the suspended
CAUTION
swivel assembly. Stow the links and
When
reassembling
the
crane
attach hardware in the tool box for use
superstructure and carrier, do not mix
in remounting the superstructure.
serial num-
A-2

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