SECTION 2 - GENERAL
2-4
3121171
Lubrication
Service applicable components with the amount, type, and
grade of lubricant recommended in this manual, at the speci-
fied intervals. When recommended lubricants are not avail-
able, consult your local supplier for an equivalent that meets
or exceeds the specifications listed.
Battery
Clean battery, using a non-metallic brush and a solution of
baking soda and water. Rinse with clean water. After cleaning,
thoroughly dry battery and coat terminals with an anti corro-
sion compound.
Lubrication and Servicing
Components and assemblies requiring lubrication and servic-
ing are shown in the Lubrication Chart in Section 1.
2.3
LUBRICATION AND INFORMATION
Hydraulic System
1.
The primary enemy of a hydraulic system is contamina-
tion. Contaminants enter the system by various means,
e.g., using inadequate hydraulic oil, allowing moisture,
grease, filings, sealing components, sand, etc., to enter
when performing maintenance, or by permitting the
pump to cavitate due to insufficient system warm-up or
leaks in the pump supply (suction) lines.
2.
Design and manufacturing tolerances of component
working parts are very close, therefore, even the small-
est amount of dirt or foreign matter entering a system
can cause wear or damage to the components and
cause faulty operation. Every precaution must be taken
to keep hydraulic oil clean, including reserve oil in stor-
age. Hydraulic system filters should be checked,
cleaned, and/or replaced as necessary, at intervals speci-
fied in the Lubrication Chart in Section 1. Always exam-
ine filters for evidence of metal particles.
3.
Cloudy oils indicate a high moisture content which per-
mits organic growth, resulting in oxidation or corrosion.
If this condition occurs, the system must be drained,
flushed, and refilled with clean oil.
4.
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. Good grade mineral oils,
with viscosities suited to the ambient temperatures in
which the machine is operating, are recommended for
use.
NOTE:
Metal particles may appear in the oil or filters of new
machines due to the wear-in of meshing components.
Hydraulic Oil
1.
Refer to Section 1 for recommendations for viscosity
ranges.
2.
JLG recommends Mobilfluid 424 hydraulic oil, which has
an SAE viscosity of 10W-30 and a viscosity index of 152.
NOTE:
Start-up of hydraulic system with oil temperatures below -
15 degrees F (-26 degrees C) is not recommended. If it is
necessary to start the system in a sub-zero environment, it
will be necessary to heat the oil with a low density, 100VAC
heater to a minimum temperature of -15 degrees F (-26
degrees C).
3.
The only exception to the above is to drain and fill the
system with Mobil DTE 13 oil or its equivalent. This will
allow start up at temperatures down to -20 degrees F (-
29 degrees C). However, use of this oil will give poor per-
formance at temperatures above 120 degrees F (49
degrees C). Systems using DTE 13 oil should not be oper-
ated at temperatures above 200 degrees F (94 degrees
C) under any condition.
Changing Hydraulic Oil
1.
Filter elements must be changed after the first 50 hours
of operation and every 300 hours (unless specified oth-
erwise) thereafter. If it is necessary to change the oil, use
only those oils meeting or exceeding the specifications
appearing in this manual. If unable to obtain the same
type of oil supplied with the machine, consult local sup-
plier for assistance in selecting the proper equivalent.
Avoid mixing petroleum and synthetic base oils.
2.
Use every precaution to keep the hydraulic oil clean. If
the oil must be poured from the original container into
another, be sure to clean all possible contaminants from
the service container. Always clean the mesh element of
the filter and replace the cartridge any time the system
oil is changed.
3.
While the unit is shut down, a good preventive mainte-
nance measure is to make a thorough inspection of all
hydraulic components, lines, fittings, etc., as well as a
functional check of each system, before placing the
machine back in service.
Lubrication Specifications
Lubricants specified by component manufacturers are always
the best choice. However, multi-purpose greases usually have
qualities which meet a variety of single purpose grease
requirements. Should any question arise, regarding use of
greases in maintenance stock, consult your local supplier for
evaluation. Refer to Section 1 for an explanation of lubricant
key designations appearing in the Lubrication Chart.
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