OPERATOR'S MANUAL MAINTENANCE

Section C - Electrics
Basic System Operation
Hammer Only
C-100 C-100
9803/9880-3
Hammer Only
Operation
C030430GB-1
Fig 90.
The hammer is operated by pressing the foot pedal
forward which supplies a pilot pressure signal to close the
pressure switch and operate the option spool in the main
control valve (MCV). When the pressure switch is closed,
ECU 1 i/p 20 (A-11) senses the grounding of the pressure
switch, which reduces the engine rpm to a level preset in
the SET menu.
The throttle potentiometer normally increases/decreases
the engine rpm from idle to max engine speed but will not
exceed the preset hammer value, regardless of its
position. The maximum "hammer revs" (engine rpm) can
be set by the operator via the SET menu on the EMS. The
up and down buttons will increase/decrease the rev/min
value, by 25 rpm for each press. Whatever value is set by
the operator is stored and becomes the new default value.
The original default value for "Hammer RPM" is 1200 rev/
min.