JLG 450A_AJ Series II Service Manual - Manual (Page 35)

SECTION 2 - GENERAL
3121290 – JLG Lift – 2-3
Component Disassembly and Reassembly
When disassembling or reassembling a component, complete
steps in sequence. 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 adjust-
ments, other than those recommended, without obtaining
proper approval.
Pressure-Fit Parts
When assembling pressure-fit parts, use a molybdenum disul-
fide base compound or equivalent to lubricate the mating sur-
face.
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 bearing.
2. Discard bearings if races and balls (or rollers) are pitted,
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 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
installed on a shaft, apply pressure to the inner race.
Gaskets
Check holes in gaskets align with openings in mating parts.
BLANK GASKETS CAN CAUSE SERIOUS SYSTEM DAMAGE. CUT HOLES IN CORRECT
LOCATIONS WHEN FABRICATING GASKETS.
If it becomes necessary to hand-fabricate a gasket, use gasket
material or stock of equivalent material and thickness.
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.
Bolt Usage and Torque Application
SELF LOCKING FASTENERS, SUCH AS NYLON INSERT AND THREAD DEFORMING
LOCKNUTS, ARE NOT INTENDED TO BE REINSTALLED AFTER REMOVAL.
1. Always use new hardware when installing locking fas-
teners. Use bolts of proper length. A bolt which is too
long will bottom before head is tight against its related
part. If a bolt is too short, there will not be enough
thread area to engage and hold part properly. When
replacing bolts, use only those with the same or equiva-
lent specifications of original.
2. If torque requirements are not given within the text, use
standard torque values on heat-treated bolts, studs, and
steel nuts, in accordance with recommended shop prac-
tices. (See Torque Chart Section 1.)
Hydraulic Lines and Electrical Wiring
Clearly mark or tag hydraulic lines and electrical wiring, and
their receptacles when disconnecting or removing them to
ensure they are reinstalled correctly.
Hydraulic System
1. Keep system clean. If evidence of metal or rubber parti-
cles are found in hydraulic system, drain and flush 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 assem-
bly.
Lubrication
Service applicable components with amount, type, and grade
of lubricant recommended in this manual at specified inter-
vals. When recommended lubricants are not available, consult
your local supplier for an equivalent that meets or exceeds
listed specifications.
NOTE: Components and assemblies requiring lubrication and ser-
vicing are shown in the Lubrication Chart in Section 1.