Manual Hammer Operation - JUNTTAN PM 20L Operator's Manual

JUNTTAN

6.5.9.1 MANUAL HAMMER OPERATION

• Check that there is no person in the machine working radius.
• Check that the hammer is resting on a pile.
• Drive cap is its top position.
• Unwind hammer and pile winch ropes enough so that there is no load suspended by
the winches.
• Turn the piling mode switch on the right console to position 1 - manual piling. In this
position the hammer hydraulic circuit is pressurized and you can follow the pressure
increase to the pre-set limit in the gauge.
• The pressure setting used for the hammer is stated in the specifications manual of the
hammer. Make a habit of monitoring that the hammer circuit pressure stays in the
specified range during operation of the hammer.
• To operate the hammer manually giving single blows, push the ram block single lift
buttons down simultaneously (green buttons on the left and right consoles).
• The brakes of the hammer and the pile winch open when you press the single lift
buttons and close when you release single lift buttons.
• The ram block will be lifted as long as you press the single lift buttons down and
released to drop when you release one or both single lift buttons.
• When you have lifted ram block manually up and you release your finger from the
single lift buttons, the ram block goes down. Never push the buttons when the ram
block moves downwards.
• When you stop hammer operation turn the piling mode switch to position 0.
n WARNING
Do not turn the piling mode switch to position 1 or 2 if the hammer is not resting on a
pile. Check also that there is enough slack in the ropes of the winches.
If the hammer starts working before you press the single lift buttons stop working
immediately. Find the reason for that and repair it.
n DANGER
In the manual mode the winches brakes are released when the single lift buttons are
pressed. The brakes are open until you release single lift buttons. Pay special
attention to the ropes and unwind them if necessary. If you start to lift the ram block
while it is bouncing up and down after the previous impact there can be excess strain
on the hammer that eventually can cause damage.
Daily operation section
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