Disconnect the pile line (aux. hoist), wire rope lifting sling, and headache ball from
the front lifting lug on the spotter and reconnect to the middle lifting lug.
Using the pile line (aux. hoist), raise the spotter until it is level.
With ground personnel on the carrier frame at the end of the spotter, use a
combination of the boom and pile line (aux. hoist) to hoist and raise the spotter into
position over the center-rear of the carrier frame. The ground personnel should
guide the spotter base into the spotter mounting brackets on the crane
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.
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.
Using the crane boom, lower the lead tower and spotter. Disconnect the pile line
(aux. hoist), wire rope lifting sling, and headache ball from the center lifting lug on
Spotter Length and Height Adjustment
The length of the spotter, adjusted by the crane operator, controls the pitch of the lead tower.
This will need to be adjusted to perform the impact hammer installation and is also used during
pile driving operations.
The spotter is extended and retracted by placing the
TELE/CLAMSHELL selector switch, in the superstructure cab, in the CLAMSHELL position and
moving the telescope/clamshell control pedal to operate the hydraulic cylinder of the spotter.
The boom telescope hydraulic functions are disabled while
operating the spotter.
To telescope the boom, return the
TELE/CLAMSHELL selector switch in the superstructure cab, to
the TELE position.
The height of the spotter slide connection to the lead tower can be adjusted if necessary. The
spotter slide can be moved to a hole in the lead tower above the seventh up from the foot roller
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.
Perform the following procedure to raise the height of the spotter slide connection to the lead
Ensure the Load Moment Indicator (LMI) system on the crane is configured for
Rear Hoist, Outrigger Position 100%, and Two (2) Parts of Line.
Attach a wire rope lifting sling with a shackle to the front lifting lug on the spotter
and attach the headache ball on the pile line (aux hoist) to the wire rope lifting
Remove the slack in the pile line (aux. hoist) to slightly support the spotter.
Change 1 H-47