910161
Hydraulic Rail Drill
Phone: (262) 637-9681
Email:
1.2023 Rev 3.1
Original Instructions
Page 13
Setting for Open-Center or Closed-Center
The Rail Drill is equipped to allow the tool to be used with either Open or Closed Center hydraulic power
systems. To change between open and closed center remove the bolt holding the trigger to the spool and
flip the trigger up.
1. For open center operation, turn trigger spool so that the red dot on the front of the trigger points
towards the letters 0/C on trigger.
2. For closed center, turn trigger spool so that the red dot on the front of the trigger points toward the
letters C/C on trigger.
3. Reattach the trigger.
Open-Center Systems
An Open-Center System is a hydraulic system in which
the oil circulates at all times.
•
When a tool is in the circuit and not activated, the oil
bypasses the tool motor returning to tank.
•
When the trigger is activated, oil is diverted by an
activation spool into the gerotor motor.
•
These systems do not provide as much instant power
as their closed-center counterparts.
The Rail Drill is factory set at
Open-
Center
.
This is indicated by the position of the dot
to the right of the slot.
