JLG 660SJ Service Manual - Manual (Page 88)

SECTION 3 - CHASSIS & TURNTABLE
3-38 – JLG Lift – 3120840
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.
3.7 DRIVE MOTOR ADJUSTMENT
PROCEDURE (S MODELS ONLY)
1. Remove the cap nut from adjustment screw.
2. Loosen jam nut on the adjustment screw and make
adjustment.
3. Measure from top of jam nut to the end of adjust-
ment screw. Refer to Figure 3-20., Drive Motor
Adjustment (S Models).
4. Tighten jam nut, install cap nut.
NOTE: The “o” ring must be seated in groove in cap nut.
Figure 3-20. Drive Motor Adjustment (S Models)