JLG 600A_AJ Service Manual - Manual (Page 79)

SECTION 3 - CHASSIS & TURNTABLE
3121201 – JLG Lift – 3-29
4. Pumps counterclockwise driven must have a posi-
tion of the valve plate 4 degrees de-centered in ccw
position.
5. Assembly of the port plate and the pump housing:
Note the correct position of the drilling that connects
high pressure to the control valve. Check control
valve drill position at the pump housing and fit
together.
Taper Roller Bearing Initial Tension
Cast iron pump housing must have initial tension of the
bearings: 0........0,05 mm, grind Pos. 12 if necessary.
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.