JLG 450AJ ANSI Operator Manual - Manual (Page 18)

SECTION 2 - PREPARATION AND INSPECTION
2-2 – JLG Lift – 3120748
Turntable
1. Check turntable for damage, loose or missing parts,
and security. Check swing drive and brake for dam-
age, loose or missing parts, hydraulic lines and
component housings for evidence of leakage; worm
gear for proper mesh with swing gear.
2. Check swing bearing for damage, wear, lubrication
and loose or missing bearing bolts.
3. Check solenoid valves and hydraulic lines for dam-
age, leakage, security and electrical connections for
tightness and evidence of corrosion.
4. Check ground controls for damage, loose or miss-
ing parts, security, electrical connections for evi-
dence of corrosion and tightness and wiring for
insulation damage. Assure that all switches function
properly.
5. Check battery for damage, loose or missing vent
caps, electrical connections for tightness, and evi-
dence of corrosion, hold-down brackets for tight-
ness, and electrolyte for proper water level. Add only
clean distilled water to battery.
6. Check engine tray pivot assembly for damage, loose
or missing parts, and security.
7. Check engine and accessories for damage, loose or
missing parts, leakage and security. Check throttle
solenoid and linkage for damage, electrical connec-
tions for tightness, and evidence of corrosion and
wiring for insulation damage.
8. Check fuel lines for damage, leakage and security.
9. Check all access doors for damage, proper opera-
tion of latches, props and security.
10. Check fuel tank for damage, leakage and filler cap
for security.
11. Check hydraulic reservoir and hydraulic lines for
damage, leakage and security.
NOTE: JLG recommends replacing the hydraulic filter ele-
ment after the first 50 hours of operation and then
every 300 hours thereafter, unless system indicator
require earlier replacement.
12. Check all pin and shaft retaining hardware for secu-
rity and wear.
13. Check all electrical cables for defects, damage,
loose or corroded connections.
Boom
1. Check Lower Boom and leveling link for damage,
missing parts and security.
2. Check all pin and shaft retaining hardware for secu-
rity and wear.
3. Check hydraulic lines and electrical cable for dam-
age, missing parts and security.
4. Check limit switch connections and plunger for cor-
rosion and security.
5. Check Lower Upright, cross pins and hydraulic lines
for damage, wear, lubrication, leakage and security.
6. Check Lower Upright for damage, wear, lubrication
and security.
7. Check hydraulic lines mounted on upright for dam-
age, leakage and security.
8. Check boom pivot bushings for wear.
9. Check boom lift cylinder and hydraulic lines for dam-
age, leakage and security. Check lift cylinder cross
pins for damage, wear and security.
10. Check all pin and shaft retaining hardware for secu-
rity and wear.
11. Check Upper Upright, cross pins and hydraulic lines
for damage, wear, lubrication, leakage and security.
12. Check Upper Upright for damage, wear, lubrication
and security.
13. Check hydraulic lines mounted on upright for dam-
age, leakage and security.
14. Check Upper Boom Lift Cylinder and cross pins and
hydraulic lines for damage, wear, lubrication, leak-
age and security.