JLG 4013PS Service Manual - Manual (Page 43)

3-11 3508PS, 3509PS, 3512PS, 3513PS, 4008PS, 4009PS, 4012PS, 4013PS, 4017PS, 40.8, 40.9
Boom
11. Using a sling around the front of the second boom
section, lift and slide the three boom sections 75% of
the way out of the first boom section. Set the boom
head down on a suitable support, then center the
sling to be able to balance the three boom sections
being removed. Carefully pull the three boom
sections the remainder of the way out of the first
boom section and set the three boom sections down
on suitable supports.
12. Remove the clip and pin holding each retract chain
from the inside of the first boom section. Clean and
inspect chains. Replace if damaged.
13. Label, disconnect and cap the Tilt and Auxiliary
hydraulic hoses from tubes at bottom front of first
boom section. Plug all fittings to prevent dirt and
debris from entering hydraulic system. Clean and
inspect the hoses. Replace if damaged.
14. Inspect the boom and welds. Consult your local
authorized service distributor if structural damage is
detected.
15. Inspect hoses, hardware, wear pads, mounting
points, chains and other components visible with the
first boom section. Replace any item if damaged.
(Refer to Section 3.7.1, “Boom Chain Inspection,”
and Section 3.10.1, “Wear Pad Inspection.”)
Note: It is recommended that if any chain or hose is
damaged that ALL chains or hoses are replaced.
3.6.3 Third and Fourth Boom Section
Removal
1. With the three boom sections setting on suitable
supports remove bolts, keeper and pin from both
sheaves on the bottom front of the second boom
section. Remove sheaves. Remove all wear pads on
the front inside of the second boom section. Label all
parts for installation.
2. Remove the bolts, keeper and pin from center
sheave on the bottom rear of the third boom section.
Remove the sheave.
3. Remove the top left and right side rear wear pads on
the third boom section. Loosen the bottom rear wear
pad bolts and remove the shims from the third boom
section to gain the necessary clearance to remove
the third boom section from the second boom
section. Label all parts for installation.
4. 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 (3) the remainder of the way out of the
second boom section and set the two boom sections
down on suitable supports.
5. Remove the lock bolts, keeper and pin from both
sheaves at bottom rear of the second section boom.
Remove the sheaves.
6. Remove the clip and pin holding retract chain from
bottom front of second boom section. Clean and
inspect chain. Replace if damaged.
7. Inspect the boom and welds. Consult your local
authorized service distributor if structural damage is
detected.
8. Inspect hoses, hardware, wear pads, mounting
points, chains and other components visible with the
first boom section. Replace any item if damaged.
(Refer to Section 3.7.1, “Boom Chain Inspection,”
and Section 3.10.1, “Wear Pad Inspection.”)
Note: It is recommended that if any chain or hose is
damaged that ALL chains or hoses are replaced.
MZ0760
3