JLG 450A_AJ Series II Service Manual - Manual (Page 39)

SECTION 2 - GENERAL
3121180 – JLG Lift – 2-3
Component Disassembly and Reassembly
Complete steps in sequence when disassembling or reas-
sembling a component. Do not partially disassemble or
assemble one part, then start on another. Always recheck
your work to ensure nothing has been overlooked. Do not
make any adjustments, other than those recommended,
without obtaining proper approval.
Pressure-Fit Parts
Use anti-seize or a molybdenum disulfide base com-
pound to lubricate the mating surface when assembling
pressure-fit parts.
Bearings
1. When a bearing is removed, cover it to keep out dirt
and abrasives. Clean bearings in nonflammable
cleaning solvent and allow to air dry. Compressed
air can be used, but do not spin bearing.
2. Discard bearings if races and balls (or rollers) are
pitted, scored, or burned.
3. If bearing is serviceable, apply a light coat of oil and
wrap it in clean (waxed) paper. Do not unwrap reus-
able or new bearings until 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 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 as the original or 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 accor-
dance with recommended shop practices. (See
Torque Chart Section 1.)
Hydraulic Lines and Electrical Wiring
Clearly mark or tag hydraulic lines, electrical wiring, and
their receptacles when disconnecting or removing them.
This ensures they will be correctly reinstalled.
Hydraulic System
1. Keep system clean. If evidence of metal or rubber
particles are found in the hydraulic system, drain
and flush entire system.
2. Disassemble and reassemble parts on clean work
surface. Clean all metal parts with non-flammable
cleaning solvent. Lubricate components to aid
assembly if required.
Lubrication
Service applicable components with amount, type, and
grade of lubricant recommended in this manual, at speci-
fied intervals. When recommended lubricants are not
available, consult your local supplier for an equivalent that
meets or exceeds specifications.
Battery
Clean battery with 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
servicing are shown in the Lubrication Chart in Section 1.