Boom
3.4
3507, 3508, 3509, 3512, 3513, 4007, 4008, 4009, 4012, 4013
a. If the boom is going to be disassembled after
removal:
1. Set the complete boom on level ground and by
repositioning the slings, turn boom over on to the top
side. Set the complete boom on suitable stands to
begin teardown.
Note:
With the complete boom setting upside down, the
other boom section(s), tilt cylinder and hoses are made
more accessible.
2. Remove the access panel from the boom head.
3. Label, disconnect and cap the hoses attached to the
tilt cylinder and the hose rack on the side of the first
boom section.
4. Attach a sling through the rod end of the tilt cylinder.
Remove the clip from the barrel end of the tilt
cylinder pin. Remove the tilt cylinder pin and lift the
tilt cylinder out of the boom head.
5. Remove the hose clamp inside the innermost boom
section.
6. Label, disconnect and cap the hoses attached to the
extend/retract cylinder at the rear of the boom.
7. Pull the extend/retract, tilt and auxiliary hoses (
1
) out
through the rear of the boom.
8. Remove the clip from the rear extend/retract cylinder
pin (
2
).
9. On 12 & 13M machines, remove the 2 brackets that
secure the extend/retract cylinder to the second
boom section.
10. Use a sling around the innermost boom section to
take any pressure off of the wear pads to make pad
removal easier.
11. Use a sling to pull the remaining boom section(s) out
far enough to gain access to the rod end of the
extend/retract cylinder.
12. Remove the clip from the front extend/retract
cylinder pin. Pull the extend/retract cylinder (
3
) out
through the rear of the boom.
3.3.2
Second Section Boom Removal
(12 & 13M)
1. With the boom sections sitting on suitable supports,
use a sling around the third boom section (
4
) to take
any pressure off of wear pads to make pad removal
easier.
2. Remove the top, left and right side wear pads,
backing plates and shims. Loosen the bottom wear
pad bolts and remove the shims from the first boom
section to gain the necessary clearance to remove
the first boom section from the second boom section
(
5
). Tag each pad, backing plate, shim and bolts
from each location.
3. Pull the second and third boom sections out from the
first boom section (
6
).
3.3.3
Third Section Boom Removal
(12 & 13M)
Second Section Boom Removal
(7, 8 & 9M)
1. Remove the top left and right side wear pads,
backing plates and shims. Loosen the bottom wear
pad bolts and remove the shims from the innermost
boom section to gain the necessary clearance to
remove the last boom section (
7
). Tag each pad,
backing plate, shim and bolts from each location.
2. Pull out the innermost boom section (
7
).
3. Remove the remaining wear pads.
MZ1720
1
2
3
MZ1740
4
5
6
