Lubrication; Hydraulic Oil; 1.10 Component Weights; 1.11 Pressure Settings - JLG T500J Service And Maintenance Manual

1.9

LUBRICATION

Hydraulic Oil

Table 1-9. Hydraulic Oil
Hydraulic System Operating
Temperature Range
+0° to + 180° F (-18° to +83° C)
+0° to + 210° F (-18° to +99° C)
+50° to + 210° F (+10° to +99° C
NOTE: Hydraulic oils require anti-wear qualities at least API Ser-
vice Classification GL-3, and sufficient chemical stability for
mobile hydraulic system service2.
NOTE: Aside from JLG recommendations, it is not advisable to mix
oils of different brands or types, as they may not contain
the same required additives or be of comparable viscosi-
ties.
Table 1-10. Mobilfluid 424 Specs
SAE Grade
ISO Grade
Gravity, API
Density, Lb/Gal. 60°F
Pour Point, Max
Flash Point, Min.
Brookfield, cP at -18°C
at 40° C
at 100° C
Viscosity Index
3121200
S.A.E. Viscosity
Grade
10W
10W-20, 10W30
20W-20
10W30
55
29.0
7.35
-46°F (-43°C)
442°F (228°C)
Viscosity
2700
55 cSt
9.3 cSt
152
SECTION 1 - SPECIFICATIONS

1.10 COMPONENT WEIGHTS

Table 1-11. Component Weights
Component
Frame (bare)
Frame - CE, Aus (bare)
Turntable (bare)
Booms & Cylinders Assembly
Main Boom
Engine Assembly 
(Including Tray)
Engine (bare)
Axle
Platform w/Rotator
Platform W/o Rotator

1.11 PRESSURE SETTINGS

Cold temperatures have a significant impact on pressure read-
ings. 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 read-
ings are acceptable if they are within ± 5% of specified pres-
sures.
Table 1-12. Pressure Settings
Circuit
Main Relief
Telescope In
Telescope Out
Platform Level Up
Platform Level Down
Swing Right
Swing Left
Jacks In
Pounds Kilograms
597 271
939 382
262 119
1905.6 866.2
1451 435
113 53
57 26
271.2 123.4
137 62
83 38
PSI Bar
2950 203.5
2850 196.5
2400 166
2800 193
2000 138
600 - 800 41 - 55
600 - 800 41 - 55
2500 172.5
1-3