Observe the following precautions during pile driving operation:
Never leave the impact hammer unattended while in operation.
When driving a pile, do not exceed the recommended pile
driving criteria of 20 blows per inch (2.5 cm). If the pile does
not drive into the ground more than one inch (2.5 cm) per 20
blows, it is obstructed and further driving may cause damage
to the pile.
When driving wood and sheet piles, start with a low pressure
gauge setting (low stroke rate). Gradually increase the stroke
rate if practical.
Never adjust the height of the spotter below the horizontal
position particularly when working near the spare tire mount.
Damage to the spare tire mount could occur.
When hoisting piles into position underneath the impact
hammer, ground personnel must stand at least the 1-1/2 times
the length of the pile from the bottom of the lead tower. The
bottom of the pile can suddenly swing upwards after
contacting the direct drive assembly of the impact hammer.
The crane operator must always monitor the load moment
indicator (LMI) system during operation of the Pile Driving
System. The capacity of the crane, as indicated by the LMI
system, should never be exceeded during any operation.
If the pile line (aux. hoist) remains connected to components
during pile driving operations (i.e. ground-release shackles are
not used), simultaneously pay out the pile line (aux. hoist)
cable as load lowers. Do not allow tension to develop on pile
line (aux. hoist) during pile driving operations.
While the impact hammer is driving a pile and traveling down
the lead tower, simultaneously pay out hammer line (main
hoist) cable to maintain the hammer trip assembly in the
middle portion of the hammer trip track rails. Do not allow
tension to develop on the hammer line (main hoist) during pile
Pile driving should be performed over the rear of the crane
within a 120 degree arc on either side of the crane.
H-6 Change 1