Directional Valve - JLG 3394RT Service Maintenance Manual

SECTION 4 - HYDRAULICS

4.13 DIRECTIONAL VALVE

PA2
PA1
PA3
PA4
item
PA1
PB1
4-18
PB3
PB1
PB2
PB4
Figure 4-21. Directional Valve
Torque
40 ft-lbs
(54 Nm)
23 ft-lbs
(31 Nm)
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Pressure Setting Procedure
Cold temperatures have a significant impact on pressure
readings. JLG Industries Inc. recommends operating the
machine until the hydraulic system has warmed to normal
operating temperatures prior to checking pressures. JLG
Industries Inc. also recommends the use of a calibrated
gauge. Pressure readings are acceptable if they are within
± 5% of specified pressures.
1. Activate engine and allow hydraulic system to come
up to operating temperature.
2. Install pressure gauge at quick connect on main
valve (M1).
3. Energize and bottom ut the leveling jack function.
Adjust relief to 2800 psi (193 bar).
4. De-energize jack function and shut down engine.
Remove pressure gauge.
– JLG Lift –
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