TM 5-3810-307-10
Perform the following procedure to remove the spotter from the crane with a 60-foot (18.3 m)
four-section lead tower:
a.
Ensure the Load Moment Indicator (LMI) system on the crane is configured for
Rear Hoist, Outrigger Position 100%, and Two (2) Parts of Line.
b.
Instruct the crane operator to fully retract the spotter and then extend it
approximately two inches (5 cm) to the white line painted on the spotter.
NOTE
Fully retracting the spotter and then extending it approximately
two inches (5 cm) to the white line painted on the spotter will
relieve any pressure built up in the hydraulic lines and make the
spotter the exact size required to fit properly in the
storage/transportation container. The spotter will not fit properly in
the storage/transportation container and the hydraulic lines will be
not be able to be reconnected to the spotter (without relieving the
pressure manually) unless this is performed.
c.
Temporarily attach the hydraulic hose reel lines to the spotter mounting bracket
and secure the hoses with a temporary hydraulic hose retainer chain (i.e. small
length of chain). Remove the hydraulic hose retention chain attached to the base
of the spotter from the chain attached to the hydraulic hose reel lines.
d.
Remove the hydraulic hose reel lines from the hydraulic hose connections (spotter
manifold) on the spotter and replace the protective caps.
e.
Attach a wire rope lifting sling with a shackle to the center lifting lug on the spotter
and attach the headache ball on the pile line (aux hoist) to the wire rope lifting
sling.
f.
Remove the slack in the pile line (aux. hoist) to slightly support the spotter.
WARNING
Check the pressure at the two spotter support pins securing the
spotter base in the mounting lugs on the spotter mounting
brackets when removing the spotter from the crane. The pins
must move easily before trying to remove them.
g.
Remove the cotter pins from the two spotter support pins.
h.
With ground personnel at each end of the spotter, carefully remove the two spotter
support pins securing the spotter base in the mounting lugs on the spotter mounting
brackets.
i.
Using the pile line (aux. hoist), hoist and remove the spotter from the spotter
mounting brackets on the crane superstructure.
j.
Using the crane boom and the pile line (aux. hoist), lower the rear of the spotter
down onto wood blocks.
k.
Disconnect the pile line (aux. hoist), wire rope lifting sling, and headache ball from
the center lifting lug on the spotter.
l.
Attach the wire rope lifting sling with a shackle to the front lifting lug on the spotter
Change 1 H-83
