JLG 1100SB Service Manual - Manual (Page 217)

SECTION 4 - BOOM & PLATFORM
3121265 – JLG Lift – 4-47
8. Fully retract the boom assembly and verify the
exposed boom section dimensions meet the dimen-
sion tolerances shown in Figure 4-28., Wire Rope
Tensioning Figure A.
9. Reinstall nylon collar locknuts to fly extend wire rope
fittings. Torque locknuts to 10 ft.lb. (14 Nm).
10. Reinstall lock plates to remaining adjuster nuts.
11. Install all covers and check for proper function of
boom assembly.
DO NOT REPEAT STEPS #2 THROUGH #7 MULTIPLE TIMES TO
VERIFY ROPE TENSION. VERIFICATION OF THE ROPE TENSION
SHOULD BE DETERMINED BY PROPER FUNCTION OF THE BOOM
ASSEMBLY.
BOOM SECTION REPOSITIONING EXAMPLE:
If the outer mid boom section is still extended outside of
the tolerance as shown in Figure 4-28., Wire Rope Ten-
sioning Figure A while the boom assembly is fully
retracted, it will be necessary to loosen the outer mid
extend wire rope fittings. After loosening the outer mid
extend wire rope fittings, extend the boom assembly 5 to 6
feet (1.5 to 1.8 m) from the fully retracted position and
repeat the tensioning steps for the outer mid retract ropes.
Steps #5 & #6 should then be repeated. Once those
steps are complete, fully retract the boom assembly and
verify that the exposed boom section dimensions meet
the dimension tolerances of Figure 4-28., Wire Rope Ten-
sioning Figure A.
This same method can be applied to repositioning the fly
boom section by substituting the correct steps for the fly
boom wire ropes. This is also applicable if either of the
sections is positioned too far in, in the retracted position.
The technician should begin the repositioning procedure
with the boom partially extended, slightly loosen the
retract wire ropes, and partially retract the boom.
NOTE: Ensure that the boom is not fully retracted.
At this point, the correct steps should be followed to ten-
sion the extend wire ropes for that section. Once those
steps are complete, the steps required to tension the
retract wire ropes should then be performed.
NOTE: Any repositioning of the outer mid boom section will
also effect the position of the fly boom section, as
the outer mid is used to control the movement of the
fly. The best practice is to correctly position the outer
mid boom before repositioning the fly boom.