CONTROL ADJUSTMENTS
Hydraulic Displacement Control
The adjustment of the control may be accomplished
following these procedures without voiding the pump
warranty.
1.
Install a 300 psi gauge into the charge pressure
gauge port.
2.
Using
a
1"
wrench,
remove
the
neutral
adjustment plug on the neck of the control.
3.
Make certain the command signal console is in
the neutral position (O psi command signal).
CAUTION
To adjust neutral requires operating
the pump. Take necessary safety
precautions.
Maximum
system
pressure may. occur on start up.
Machine may move.
4.
Start prime mover and run at low idle.
5.
Bleed air from the system by loosening a fitting,
preferably at the highest possible point of the
control system.
6.
Slowly increase prime mover speed to rated
RPM.
7.
If transmission operates while command signal
console is in neutral, reduce speed to idle.
Using a 1/8" internal hex wrench, slowly turn the
neutral adjustment screw clockwise (CW) or
counterclockwise (CCW) until transmission does
not operate. Repeat Step 6.
NOTE
Charge
pressure
should
be
approximately 200 PSI when the
control is in the neutral position but
will drop to approximately 180 PSI
where it is in forward or reverse due
to the shifting of the shuttle valve in
the motor manifold.
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