JLG 601S ANSI Service Manual - Manual (Page 65)

SECTION 3 - CHASSIS & TURNTABLE
3120746 – JLG Lift – 3-25
Testing and Setup
DR: When pressure line is closed adjust the pressure of
the controller (if it’s DFR design then open the adjustable
orifice and increase force of the spring - FR -).
FR: If swivel angle is in the mid position adjust differential
pressure 14 bar adjustable orifice is partly closed).
Mechanical flow limiter: While screwing in the threaded
pin you will be able to reduce the flow from Vg max to 50%
of Vg max.