Table of Contents
Advertisement
MODEL 220
HYDRAULIC
IMPACT HAMMER
III.
OPERATING INSTRUCTIONS
E. OPERATION OF THE HAMMER (CONTINUED)
4. Stroke Setting
Stroke setting is controlled by the CLAMP OPEN-CLOSE switch. The full stroke
mode is the normal hammer mode. The hammer will run in at any stroke length
as long as the clamp switch remains in the middle, neutral position. To reduce
stroke setting, turn the clamp switch to the OPEN position briefly. This will
extend the variable stroke cylinder shortening the stroke. When stroke is at the
length required, release the clamp switch. The switch will spring return to its
neutral position. To lengthen the stroke turn the clamp switch to the CLOSE
position briefly. This will retract the variable stroke cylinder lengthening the
stroke. When stroke is at the length required, return the clamp switch to its
neutral position.
operation.
The operation of the hydraulic hammer can be controlled directly from the
control panel, by the remote-control pendant or with the radio control unit.
These control locations have identical switches for hammer stop/start, egine
RPM and stroke setting.
The hammer is controlled by three, two-way switches. These switches are
labeled CLAMP OPEN-CLOSE, FORWARD-REVERSE and FAST/SLOW. The
switches are labeled in this manner because Model 175 also operates J&M
Earth Augers and Vibratory Hammer.
The stroke length may be changed while hammer is in
III-5
Advertisement
Table of Contents
