JLG 9MP Service Manual - Manual (Page 11)

SECTION 1 - MACHINE SPECIFICATIONS
3121163 – JLG Lift – 1-3
Lubrication Specifications
1.6 HYDRAULIC PRESSURE ADJUSTMENT
Adjust system pressure so that platform will raise with
maximum rated capacity in platform.
The following pressure is a factory recommended (initial)
pressure settings;
Turning adjustment screw clockwise increases system
pressure, turning screw counterclockwise decreases
system pressure.
Perform pressure adjustment with oil at normal operating
temperature. If pressure is set when oil is cold, platform
may not raise rated load after oil has warmed.
OPEN HYDRAULIC SYSTEM LINES ONLY WITH THE MAST FULLY
LOWERED TO RELIEVE PRESSURE IN THE SYSTEM. CAREFULLY
LOOSEN REQUIRED FITTINGS, WEAR SAFETY PROTECTION
EQUIPMENT WHEN WORKING WITH HYDRAULIC SYSTEMS.
Connect pressure gauge as shown in Figure 1-2., Typical
Hydraulic Pressure Gauge Installation. Select a T-Fitting to
exactly match the thread size of the pump pressure line
and gauge fitting as required.
0° F to +210° F
(-18° C to +99° C)
10W-20, 10W-30
50° F to 210° F
(+10° C to +210° C)
20W-20
Table 1-3. Lubrication Specifications
KEY SPECIFICATIONS
MPG - Multipurpose Grease having a minimum dripping point
of 350° F. Excellent water resistance and adhesive qual-
ities, and being of extreme pressure type. (Timken OK
40 pounds minimum.)
EPGL - Extreme Pressure Gear Lube (oil) meeting API service
classification GL-5 or MIL-Spec MIL-L-2105.
HO - Hydraulic Oil. ISO-Vg grade 32, 46.
MODEL PRESSURE SETTING
9MP 1300 PSI
Table 1-2. Hydraulic Oil Operating Range
HYDRAULIC SYSTEM OPERATING
TEMPERATURE RANGE
SAE VISCOSITY
GRADE
1. Remove Adjust Screw Cap 2. Pressure Adjustment Screw
Note: Ground Control Station cover has been removed.
Figure 1-1. Hydraulic Pressure Adjustment -
Cap and Screw
1. Pressure Gauge Assembly 4. Return Line
2. Extend Line 5. Pressure Adjust Screw
3. Tee Fitting
Figure 1-2. Typical Hydraulic Pressure Gauge
Installation.
1
2
1
5
2
3
4