TM 5-3810-307-10
WARNING
Be sure that the crane operator can see all ground personnel
including those on the crane. Ground personnel on the carrier
deck must always position themselves to prevent obstructing the
crane operator's view.
NOTE
The installation of the spotter is different for a 60-foot (18.3 m) four-
section lead tower.
Perform the following procedure to install the spotter on the crane with a 45-foot (13.7 m) three-
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.
Using the crane boom, raise the lead tower off of the ground high enough to allow
the spotter to pass under the foot roller.
c.
If not installed, attach a rope tag line to the manual release on the spotter slide.
d.
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.
e.
With ground personnel at each end of the spotter, use the pile line (aux. hoist) to
hoist and raise the spotter into position over the center-rear of the carrier frame.
One of the ground personnel should climb onto the carrier frame in order to guide
the spotter base into the spotter mounting brackets on the crane superstructure.
f.
Secure the spotter base in the mounting lugs on the spotter mounting brackets with
two spotter support pins. Insert the spotter support pins all the way and retain
each with a cotter pin.
g.
Shackle the hydraulic hose retention chain attached to the base of the spotter to
the chain attached to the hydraulic hose reel lines. Then disconnect the temporary
hydraulic hose retainer chain.
h.
Remove the protective caps on the hydraulic hose connections (spotter manifold)
and connect the hydraulic hose reel lines to the appropriate connections.
CAUTION
The spotter slide pin should not be allowed to engage a hole in the
lead tower lower than the seventh hole up from the foot roller.
This will ensure that the spotter will not make contact with and
damage the spare tire mounting bracket.
i.
For spotter installation use a boom length of 46-feet (14 m) for a 45-foot (13.7 m)
lead tower (three sections).
j.
Using the crane boom, lower the lead tower and rotate the spotter slide to the near
vertical position. Engage the spotter slide and lead tower by adjusting the lead
tower, raising the spotter with the pile line (aux. hoist), and turning the spotter slide.
Change 1 H-45
