JLG 67SL Service Manual - Manual (Page 16)

SECTION 1 - SPECIFICATIONS
1-4 – JLG Lift – 3121322
1.8 PRESSURE SETTING
Cold temperatures have a significant impact on pressure
readings. JLG Industries Inc. recommends setting the
pressures with the operating temperature between 59°-
68°F (15°- 20°C). JLG Industries Inc. also recommends the
use of a calibrated gauge. The pressures may be set with
a tolerence of ± 43.5 psi (3 bar).
1.9 MAJOR COMPONENT WEIGHTS
1.10 CRITICAL STABILITY WEIGHTS
DO NOT REPLACE ITEMS CRITICAL TO STABILITY, SUCH AS BAT-
TERIES OR SOLID TIRES, WITH ITEMS OF DIFFERENT WEIGHT
OR SPECIFICATION. DO NOT MODIFY UNIT IN ANY WAY TO
AFFECT STABILITY.
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 Industries recommends Mobilfluid 424
hydraulic oil, which has an SAE viscosity index of
152.
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 viscosities. If use of hydraulic oil other
than Mobilfluid 424 is desired, contact JLG Indus-
tries for proper recommendations.
When temperatures remain below 20°F (-7°C), JLG
Industries recommends the use of Mobil DTE 13M.
Table 1-7. Pressure Setting
Main Relief Steer Relief Pressure Switch
3046 psi
(210 bar)
2538 psi
(175 bar)
2683 psi
(185 bar)
Table 1-8. Major Component Weights
Description Weight
Platform Assembly (including extension)
1962 lbs
(890 kg)
Platform Extension
860 lbs
(390 kg)
Chassis
8377 lbs
(3800 kg)
Arm Assembly
11,243 lbs
(5100 kg)
Lift Cylinder
992 lbs
(450 kg)
Table 1-9. Critical Stability Weights
Description Weight
Engine 478 lbs (217 kg)
Wheel and Tire Assembly (each) 441 lbs (200 kg)
Wheel/Tire and Drive Assembly (each) 542 lbs (246 kg)
Batteries - Standard (each) 54 lbs (24.6 kg)
Table 1-10. Hydraulic Oil
HYDRAULIC SYSTEM OPERATING
TEMPERATURE RANGE
SAE VISCOSITY GRADE
0° to +23° F
(-18° to -5° C)
10W
0° to +210° F
(-18° to +100° C)
10W-20, 10W-30
+50° to +210° F
(+10° to +100° C)
20W-20
Table 1-11. Mobil Hydraulic Fluid Specs
Description Mobil 424 Mobil DTE 13M
ISO Viscosity Grade 10W-30 #32
Specific Gravity 29.0 0.877
Pour Point, Max -43°F (-46°C) -40°F (-40°C)
Flash Point, Min. 442°F (228°C) 330°F (166°C)
Viscosity
at 40° C (104°F)
at 100°C (212°F)
Viscosity Index 55 cSt
9.3 cSt
152
33 cSt
6.5 cSt
140