JLG 740AJ, Руководство по обслуживанию и ремонту

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SECTION 2 - GENERAL
3121160 2-3
Bearings
1. When a bearing is removed, cover it to keep out dirt and
abrasives. Clean bearings in nonflammable cleaning sol-
vent and allow to drip dry. Compressed air can be used
but do not spin the bearing.
2. Discard bearings if the races and balls (or rollers) are pit-
ted, scored, or burned.
3. If bearing is found to be serviceable, apply a light coat of
oil and wrap it in clean (waxed) paper. Do not unwrap
reusable or new bearings until they are ready to install.
4. Lubricate new or used serviceable bearings before
installation. When pressing a bearing into a retainer or
bore, apply pressure to the outer race. If the bearing is to
be installed on a shaft, apply pressure to the inner race.
Gaskets
Check that holes in gaskets align with openings in the mating
parts. If it becomes necessary to hand-fabricate a gasket, use
gasket material or stock of equivalent material and thickness.
Be sure to cut holes in the right location, as blank gaskets can
cause serious system damage.
Bolt Usage and Torque Application
1. Use bolts of proper length. A bolt which is too long will
bottom before the head is tight against its related part. If
a bolt is too short, there will not be enough thread area
to engage and hold the part properly. When replacing
bolts, use only those having the same specifications of
the original, or one which is equivalent.
2. Unless specific torque requirements are given within the
text, standard torque values should be used on heat-
treated bolts, studs, and steel nuts, in accordance with
recommended shop practices (See Torque Chart Section
1.).
Hydraulic Lines and Electrical Wiring
Clearly mark or tag hydraulic lines and electrical wiring, as well
as their receptacles, when disconnecting or removing them
from the unit. This will assure that they are correctly rein-
stalled.
Hydraulic System
1. Keep the system clean. If evidence of metal or rubber
particles are found in the hydraulic system, drain and
flush the entire system.
2. Disassemble and reassemble parts on clean work sur-
face. Clean all metal parts with non-flammable cleaning
solvent. Lubricate components, as required, to aid
assembly.
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
corrosion compound.
Lubrication and Servicing
Components and assemblies requiring lubrication and servic-
ing are shown in the Lubrication Chart in Section 1.