Service Manual Owner's manual

SECTION 1 - SPECIFICATIONS
1-4 – JLG Lift – 3121139
Drive (Elevated): Test should be done on a smooth level
surface. Drive Select Switch should be set to High Engine.
Results should be recorded for a 50 ft. course. Drive For-
ward, Record Time. Drive Reverse, Record Time.
Platform Rotate: Platform level and completely rotated
one direction. Rotate the opposite direction, Record Time.
Rotate the other direction, Record Time.
Articulating Jib: Platform level and centered with the
boom. Start with the Jib down. Jib Up, Record Time. Jib
Down, Record Time.
Test Notes
1. Stop watch should be started with the function, not
with the controller or switch.
2. All speed tests are run from the platform. These
speeds do not reflect the ground control operation.
3. The platform speed knob control must be at full
speed (turned clockwise completely).
4. Function speeds may vary due to cold, thick hydrau-
lic oil. Test should be run with the oil temperature
above 100° F (38° C).
5. Some flow control functions may not work with the
speed knob clicked into the creep position.
1.7 TORQUE REQUIREMENTS
1.8 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.
NOTE: When temperatures remain consistently below 20
degrees F. (-7 degrees C.), JLG Industries recom-
mends the use of Mobil DTE13.
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.
Table 1-12. Torque Requirements
Description
Torqu e Va l ue
(Dry)
Interval Hours
Wheel Lugs 300 ft. lbs.
(407 Nm)
150
Swing Bearing Bolts 190 ft. lbs.
(258 Nm)
50/600*
Starter Solenoid
Conta cts
Coi l
95 in. lbs. (9.5 Nm)
40 in. lbs. (4 Nm)
As required
*Check swing bearing bolts for security after first 50 hours
of operation and every 600 hours thereafter. (See Swing
Bearing in Section 3.)
NOTE: When maintenance becomes necessary or a fas-
tener has loosened, refer to the Torque Chart to
determine proper torque value.
Table 1-13. 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
Table 1-14. Mobilfluid 424 Specs
SAE Grade 10W30
Gravity, API 29.0
Density, Lb/Gal. 60°F 7.35
Pour Point, Max -46°F (-43°C)
Flash Point, Min. 442°F (228°C)
Viscosity
Brookfield, cP at -18°C 2700
at 40° C 55 cSt
at 100° C 9.3 cSt
Viscosity Index 152