JLG 1200SJP Service Maintenance Manual page 300

SECTION 4 - BOOM & PLATFORM
3. Remove the lock plates and nylon collar locknuts from
the wire rope adjustment nuts.
Outer Mid Retract Adjusting
Nuts and Lock Plates
Outer Mid Extend Adjusting
Nuts and Lock Plates
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 Adjustment
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 Adjustment
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 4-30., Wire
Rope Tensioning.
4-66
a. If the Outer Mid Boom still does not fall within the
dimension and tolerance of Figure 4-30., repeat the
Outer Mid Boom positioning procedure.
b. If the Outer Mid Boom falls within the dimension
and tolerance of Figure 4-30., proceed to the Fly
Boom Section Positioning procedure in this section.
NOTE: Because the Outer Mid Boom is used to control the move-
ment 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 position per Figure 4-30.
FLY BOOM SECTION REPOSITIONING
If the Fly Boom section location and the Outer Mid Boom sec-
tion location are both within the dimensions and tolerances in
Figure 4-30., proceed to the Wire Rope Tensioning Procedure
in this section.
If the Fly Boom section is outside of the tolerance as shown in
Figure 4-30. while the boom assembly is fully retracted, per-
form the following procedure:
1. Extend the boom assembly such that the platform
moves 5 to 6 feet (1.5-1.8 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.
Fly Boom Extend Adjusting
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.
– JLG Lift –
Nuts and Lock Plates
3121142