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MODEL 220
HYDRAULIC
IMPACT HAMMER
II.
PREPARATION FOR OPERATION
I.
FILLING THE HAMMER PRESSURE HOSE
The hammer is normally shipped with the hammer hydraulic hoses full of oil and the
unit may be used immediately. However, if the pressure hose has been removed
from the hammer, the hose may need to be filled with hydraulic oil prior to full speed
operation. It is not necessary to fill the return hose with oil.
Read SECTION III - OPERATING INSTRUCTIONS
Start and warm-up the engine in accordance with SECTION III C. With the engine
warmed-up and running at 1500 rpm, turn and hold the hammer switch to the
REVERSE position. The hoses will fill with oil in approximately two minutes. Do
not engage any other switches on the control pendant during this two minute
period.
PRESSURE HOSE (1 1/4")
RETURN HOSE (1 1/2")
EXTEND CYLINDER SHORTEN STROKE HOSE (3/8")
RETRACT CYLINDER LENGTHEN STROKE HOSE (3/8")
FIG 4
II-9
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