JLG 15VPSP Service Manual - Manual (Page 15)

SECTION 1 - SPECIFICATIONS
3120797 – JLG Lift – 1-3
1.5 LUBRICATION
Hydraulic Oil
Hydraulic oils must have anti-wear qualities at least to API
Service Classification GL-3, and sufficient chemical stabil-
ity for mobile hydraulic system service. JLG Industries,
recommends Mobilfluid 424 hydraulic oil, which has an
SAE viscosity of 10W-30 and a viscosity index of 152.
For cold weather applications, i.e. when temperatures
remain consistently below +20°F (–7°C) JLG recom-
mends using Mobil DTE 13 hydraulic oil.
Aside from JLG recommendations, it is not advisable to
mix oils of different brands or types, as they may not con-
tain the same required additives or be of comparable vis-
cosities. If use of hydraulic oil other than Mobilfluid 424 is
desired, contact JLG Industries for proper recommenda-
tions.
Lubrication Specifications
1.6 HYDRAULIC PRESSURE ADJUSTMENT
Adjust system pressure so that platform will raise with
rated capacity in platform.
The following are recommended factory pressure set-
tings;
15VPSP –1000 psi
Turning adjustment screw clockwise increases system
pressure, turning screw counterclockwise decreases
system pressure.
Make 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.
ONLY OPEN HYDRAULIC SYSTEM LINES WITH THE MAST LOW-
ERED 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., Hydrau-
lic Pressure Gauge Installation.
Select a T-Fitting to exactly match the thread size of the
pump (.562 x 18 THD), pressure line (.562 x 18 THD) and
gauge fitting as required.
Table 1-2. Machine Interlock Switch Operating Conditions.
Mast Elevation
Drive Cutout
(PHP System)
Tilt Status Brake Status Controller Response
mast retracted bars raised (not tilted) engaged Full Drive and Lift
mast retracted bars raised (not tilted) disengaged Drive and Lift Disabled
mast extended bars lowered (not tilted) engaged Drive 25% maximum
mast extended bars raised (blocked) (not tilted) engaged Drive Disabled
mast extended bars lowered (tilt) engaged Drive and Lift disabled
mast retracted bars raised (tilt) engaged Lift Disabled
mast retracted
bars raised/battery charger
plugged-in
(not tilted) engaged Drive Disabled
Table 1-3. Hydraulic Oil Operating Range
HYDRAULIC SYSTEM OPERATING
TEMPERATURE RANGE
SAE VISCOSITY
GRADE
0° F to +23° F
(-18° C to -5° C)
10W
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 1-4. 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.