JLG 740A, Service And Maintenance Manual

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SECTION 4 - BOOM & PLATFORM
4-4 – JLG Lift – 3121160
5. Supporting the slave, cylinder remove the hardware
from pin #3. Using a suitable brass drift and ham-
mer remove pin #3 from the fly boom.
6. Tag and disconnect hydraulic lines to the slave level-
ing cylinder. Use a suitable container to retain any
residual hydraulic fluid. Cap hydraulic lines and
ports. Remove the slave cylinder
4.3 MAIN BOOM POWERTRACK
Removal
1. Disconnect wiring harness connectors located in
tower upright.
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDI-
ATELY AFTER DISCONNECTING LINES TO AVOID ENTRY OF CON-
TAMINANTS INTO SYSTEM.
2. Tag and disconnect hydraulic lines from connectors
at boom assembly. Use suitable container to retain
any residual hydraulic fluid. Cap hydraulic lines and
ports.
3. Remove hydraulic lines and electrical cables from
powertrack.
4. Using suitable lifting equipment, adequately support
powertrack weight along entire length.
5. Remove bolt #1 securing the push tube on the fly
boom section.
6. Remove bolt #2 securing the push tube on the mid
boom section.
7. With powertrack supported and using all applicable
safety precautions, remove bolts #3, #4 and #5
securing rail to the base boom section. Remove
powertrack from boom section.
.
4.4 POWERTRACK MAINTENANCE
Flat Bar Removal
NOTE: Hoses shown in the powertrack are for example only.
Actual hose and cable arrangements will be differ-
ent.
1. Use a small ¼” ratchet and a T-20 Torx bit. Remove
the 8-32 x 0.500 screws from both sides. (If the track
also has a flat bar on the inside of the track instead
of round bar/poly, perform the same step to remove
it.)
Figure 4-4. Boom Power Track Components