JLG 1500SJ Service Manual - Manual (Page 325)

SECTION 4 - BOOM & PLATFORM
3121262 – JLG Lift – 4-79
3. Remove the lock plates and nylon collar locknuts
from the wire rope adjustment nuts.
4. If the Outer Mid Boom needs to be retracted:
a. Loosen the Outer Mid Boom Extend Adjustment
Nuts by an amount equal to twice the distance
the boom needs to move to be in tolerance.
b. Fully retract the boom.
c. To remove the slack caused by the previous
step, tighten the Outer Mid Boom Extend Adjust-
ment Nuts until they just contact the plate.
5. If the Outer Mid Boom needs to be extended out:
a. Loosen the Outer Mid Boom Retract Adjustment
Nuts by an amount equal to twice the distance
the boom needs to move to be in tolerance
b. Extend the boom 3-4 feet (1-1.5m).
c. To remove the slack caused by the previous
step, tighten the Outer Mid Boom Retract Adjust-
ment Nuts until they just contact the plate.
6. Fully retract the boom sections.
7. Verify that the exposed boom section dimensions
meet the dimensions and tolerances of Figure 4-22.,
Wire Rope Tensioning.
a. If the Outer Mid Boom still does not fall within the
dimension and tolerance of Figure 4-22., repeat
the Outer Mid Boom positioning procedure.
b. If the Outer Mid Boom falls within the dimension
and tolerance of Figure 4-22., proceed to the Fly
Boom Section Positioning procedure in this sec-
tion.
NOTE: Because the Outer Mid Boom is used to control the
movement of the Fly Boom, any repositioning of the
Outer Mid Boom Section will also affect the position
of the Fly Boom section. After repositioning the
Outer Mid Boom, always check the Fly Boom posi-
tion per
Figure 4-22.
FLY BOOM SECTION REPOSITIONING
If the Fly Boom section location and the Outer Mid Boom
section location are both within the dimensions and toler-
ances in Figure 4-22., proceed to the Wire Rope Tension-
ing Procedure in this section.
If the Fly Boom section is outside of the tolerance as
shown in Figure 4-22. while the boom assembly is fully
retracted, perform the following procedure:
1. Extend the boom assembly such that the platform
moves 4 feet (1.3 m) from the fully retracted position.
2. Remove the lock plates and nylon collar locknuts
from the wire rope adjustment nuts.
3. If the Fly Boom needs to be retracted farther in:
a. Loosen the Fly Boom Extend Adjustment Nuts
by an amount equal to twice the distance the
boom needs to move to be in tolerance.
b. Fully retract the boom.
c. To remove the slack caused by the previous
step, tighten the Fly Boom Extend Adjustment
Nuts until they just contact the plate.
Outer Mid Retract Adjusting
Nuts and Lock Plates
Outer Mid Extend Adjusting
Nuts and Lock Plates
Fly Boom Extend Adjusting
Nuts and Lock Plates