JLG 1230ES, Руководство по обслуживанию и ремонту

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SECTION 4 - BASE COMPONENTS
3121222 – JLG Lift – 4-33
Hydraulic System Pressure Settings
Perform final hydraulic pressure setting with oil at normal
operating temperature. If pressure is set when cold, func-
tion may not operate properly after oil has warmed.
Turning relief adjustment screw clockwise - increases
pressure , turning adjustment screw counterclockwise -
decreases pressure . DO NOT EXCEED MAXIMUM PRES-
SURE SETTINGS . (See Figure 4-13.)
1. To check the lift pressure, attach pressure gauge
to the check port on top of the valve body.
To check steer pressure remove either the left or
right steer hose fitting on the valve body and
plumb a pressure gauge at that point.
2. Power up machine, warm up oil to normal oper-
ating temperature.
3. Check initial pressure for each function, lift and
steering.
4. Adjust pressure relief according to settings
shown in Table 4-2. Lift pressure setting must be
adjusted to raise the maximum capacity allowed
in the platform with the mast fully extended. Do
not exceed the MAXIMUM pressure settings.
Table 4-2. Hydraulic Pressure Settings
1230ES MAXIMUM PRESSURE SETTING
Main 1600 PSI (110 Bar)
Steer - Left/Right 1250 PSI (86 Bar)
Component Coil Rating
Lift-Up Solenoid
28 Ohm
Steer - Left/Right Solenoid
33 Ohm
Figure 4-13. Relief Pressure Setting Locations
1. Pump Valve Body
2. Steering Right Pressure Relief
3. Steering Left Pressure Relief
4. Main Pressure Relief
5. Pressure Gauge Check Port