JLG 4017RS Service Manual - Manual (Page 61)

3-21 3614RS, 4017RS
Boom
3.10.3 Third and Fourth Boom Section Removal
1. Verify the boom assembly is setting on stable, secure
and suitable supports.
Note: Removal of the retract chain roller from the rear of the
second boom section may be required to access the extend
chain clevis assemblies.
2. Loosen and remove the mounting bolts (13) and
bracket (14) securing each extend chain clevises (15).
3. Fasten a rope/wire to each extend chain clevis.
4. At the top front of the second boom section (16),
remove the jam nuts and nuts and washers from the
extend chain clevis (17).
5. Pull the third boom section out 152 mm to 203 mm (6 in
to 8 in). Remove the top wear pads, shims and backing
plate from the second boom section. Label and tag each
set of wear pads being removed.
6. Remove the side wear pads, shims and backing plates
from either side of the rear of the second boom section.
Label and tag each set of wear pads being removed.
7. Place a sling around the front of the third boom section.
Lift and slide the two boom sections 75% of the way out
of the second boom section. Set the boom head down
on a suitable support, then center the sling to be able to
balance the two boom sections being removed.
Carefully pull the two boom sections the remainder of
the way out of the second boom section and set the
two boom sections down on suitable supports.
8. Remove the extend chains from bottom of second
boom section. Clean and inspect chain. Replace if
damaged.
9. Inspect the boom and welds. Consult your local
authorized service distributor if structural damage is
detected.
MZ7310
13
15
13 14
15
MZ7320
17
16