Service Manual Manual

SECTION 1 - SPECIFICATIONS
3120788 – JLG Lift – 1-5
1.8 FUNCTION SPEEDS
1.9 PRESSURE SETTINGS - PSI (BAR)
Cold temperatures have a significant impact on pressure
readings. JLG Industries Inc. recommends operating the
machine until hydraulic systems have warmed to normal
operating temperatures prior to checking pressures. It is
also recommended using a calibrated gauge. Pressure
readings are accepted if within +/-5% of specified pres-
sures.
1.10 CYLINDER SPECIFICATIONS
1.11 LUBRICATION
Hydraulic Oil
NOTE: Hydraulic oils must have anti-wear qualities at least
to API Service Classification GL-3, and sufficient
chemical stability for mobile hydraulic system ser-
vice. JLG Ind. recommends Mobilfluid 424 hydraulic
oil, which has an SAE viscosity index of 152.
NOTE: When temperatures remain consistently below 20
degrees F. (-7 degrees C.), JLG Industries recom-
mends the use of Mobil DTE-13.
NOTE: Machines may be equipped with Mobil EAL224H bio-
degradable and non-toxic hydraulic oil. This is Vege-
table oil based and possesses the same anti-wear
and rust protection characteristics as mineral oils,
but will not adversely affect the ground water or the
environment when spilled or leaked in small
amounts. Mobil EAL224H has a viscosity of 34 cSt at
40° C. and viscosity index of 213. The operating tem-
perature range of this oil is -18° C. to +83° C.
Table 1-14. Function Speeds (In Seconds)
Function Speed
Main Boom Lift Up 26-32
Main Boom Lift Down 19-25
Swing - (10% max diff.) 70-90
Telescope Out 18-23
Telescope In 23-29
Platform Rotate (
Left & Right) - (15% max diff.) 9-15
Jib Up - (460SJ) 17-23
Jib Down - (460SJ) 13-20
Drive Forward & Reverse (200 ft.) 27-32
(4.5 MPH)
Drive Above Horizontal, Fwd. & Rev. 46-115
(0.75-0.33 MPH)
Table 1-15. Relief Settings
Circuit PSI Bar
Main Relief - (Bang-Bang Valve) 2500 172
Main Relief (Proportional Valve) 2750 189
Lift Up N/A N/A
Lift Down 1600 110
Level Down 1800 124
Level Up 2800 193
Swing (Right & Left) 1600 110
Steer 2500 172
Jib Up (460SJ Only) 2500 172
Jib Down (460SJ Only) 1200 83
Drive - (Pre-Set) 4500 310
Table 1-16. Cylinder Specifications
Cylinder Bore Stroke Rod Dia.
Oscillation 2.5 in.
(63.5 mm)
4.125 in.
(104.8 mm)
1.75 in.
(44.45 mm)
Main Lift 5.0 in.
(127.0 mm)
39.0 in.
(990.0 mm)
2.5 in.
(63.5 mm)
Telescope 3.0 in.
(76.2 mm)
181.0 in.
(459.74 cm)
2.0 in.
(50.8 mm)
Slave 2.5 in.
(63.5 mm)
14.9 in.
(37.9 cm)
1.25 in.
(31.75 mm)
Master 2.5 in.
(63.5 mm)
15.13 in.
(38.4 cm)
1.25 in.
(31.75 mm)
Jib 3.0 in.
(76.2 mm)
18.4 in.
(46.7 cm)
1.5 in.
(38.1 mm)
steer 2.5 in
(63.5 mm)
9.2 in
(233.6 mm)
1.75 in
(44.58 mm)
Table 1-17. Hydraulic Oil
Hydraulic System
Operating Temperature Range
S.A.E. Viscosity
Grade
+0° to + 180° F (-18° to +83° C) 10W
+0° to + 210° F (-18° to +99° C) 10W-20, 10W30
+50° to + 210° F (+10° to +99° C) 20W-20