TM5-3810-307-10
i.
Ensure there are no obstructions along the proposed swing path. Then, using the
crane boom, position the pile over the center of the driving location. Adjust the
length of the spotter for any final adjustments.
j.
Using the pile (aux. hoist) and hammer (main hoist) lines, lower the pile and impact
hammer simultaneously. The pile may penetrate the ground under the weight of
the pile and impact hammer. The weight of the impact hammer should be fully
resting on the pile.
k.
Using a carpenter's level, ensure the pile is plumb. Raise, lower, telescope the
boom, and/or adjust the length of the spotter to plumb the pile.
l.
Proceed to the "Startup and Shutdown" Procedure on Page H-62 to start the
impact hammer and drive the pile.
m.
Pull the rope tag line to free the ground-release shackle from the 96-inch wire rope
lifting sling when the pile has penetrated at least three feet (91 cm).
Startup and Shutdown of the Impact Hammer
Once a pile is hoisted and setup then the impact hammer is ready to be started.
CAUTION
Before starting the impact hammer for pile driver operation,
ensure the impact hammer has been properly serviced and all
Preventive Maintenance Checks and Services (PMCS)
identified as "Before Operation (B)" have been performed.
Do not use starting fluids as a cold weather starting aid as
they can cause excessive piston stroke and damage to the
impact hammer.
Do not start the impact hammer unless it is squarely
positioned over the pile.
Do not leave the impact hammer unattended while operating.
Do not exceed the recommended pile driving criteria of 20
blows per inch (2.5 cm).
When driving wood and sheet piles, start with a low pressure
gauge setting (low stroke rate). Gradually increase the stroke
rate if practical.
Perform the following procedure to the start the impact hammer:
a.
Ensure the pressure release valve on the remote throttle is closed. Then pump the
handle on the remote throttle until the pressure gauge reads 300 psi (20.6 bar).
b.
Pull the trip safety lever cord to engage the trip engage lug and allow the impact
hammer piston to be raised by the hammer line (main hoist).
c.
With the weight of the impact hammer fully resting on the pile, pay out the hammer
line (main hoist) to allow the hammer trip assembly to bottom out on the hammer
trip track rails. This will cause the lever and shaft of the hammer trip assembly to
contact the trip engage lug, there-by placing the lifting pawl in the horizontal
engaged position.
H-62 Change 1
