JLG ERT2669, Service And Maintenance Manual

Page: 212 / 376

SECTION 4 - BASIC HYDRAULIC INFORMATION & SCHEMATICS
4-36 31215923
c. Pressure Setting Adjustment
1. If you are not already in Main Relief Pressure
calibration mode "SERVICE MODE” Menu, “SET
MAIN RELIEF?" in analyzer access level 1, then
follow steps of Section b., Pressure Setting Check:
2. Loosen the jam nut on the main relief valve
(highlighted green in Figure 4-26.) and turn the
adjustment screw (highlighted red in
Figure 4-26.) clockwise to increase pressure or
counterclockwise to decrease pressure.
3. Once the gauge reads a pressure of 2755 PSI (190
Bar) tighten down the jam nut (making sure the
adjustment screw does not rotate).
4. Once pressure adjustments are complete press
escape on the analyzer to exit pressure setting
mode.
Figure 4-26. Main Relief Valve Location