JLG 740AJ, Service And Maintenance Manual

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SECTION 4 - BOO M & PLATFOR M
3121160 4-5
4.3 MAIN BOOM POWERTRACK
Removal
1. Disconnect wiring harness connectors located in tower
upright.
HYDRAULIC LINES AND PORTS SHOULD BE CAPPED IMMEDIATELY AFTER DIS-
CONNECTING LINES TO AVOID ENTRY OF CONTAMINANTS 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 pow-
ertrack.
4. Using suitable lifting device, adequately support pow-
ertrack 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 base
boom section.
7. With powertrack supported and using all applicable
safety precautions, remove bolts #3, and #4 securing rail
to the base boom section. Remove powertrack from
boom section.
Installation
1. Using suitable lifting device, adequately support the
powertrack weight along entire length.
2. With powertrack supported and using all applicable
safety precautions, install bolts #3 securing rail to the
base boom.
3. Install bolts #2 securing the push tube on the base
boom section.
4. Install bolts #1 securing the push tube on the fly boom
section.
5. Install bolts #4 securing rail to push tube.
6. Remove tag and reconnect all hydraulic lines and elec-
trical cable from powertrack.
7. Reconnect dual capacity indicator limit switch from side
of boom section.
8. Remove tag and reconnect hydraulic lines from connec-
tors at boom assembly.
3
Figure 4-5. Boom Power Track Components