3.7
3507, 3508, 3509, 3512, 3513, 4007, 4008, 4009, 4012, 4013
Boom
3.4
BOOM WEAR PADS
The wear pads on this machine are flat rectangular wear
pads with metal inserts.
A total of 13 wear pads are installed on the boom sections
of the 7, 8 & 9M machines.
A total of 26 wear pads are installed on the boom sections
of the 12 & 13M machines.
3.4.1
Wear Pad Inspection
Inspect all wear pads for wear. If the angle indicators (
10
)
on the ends of the wear pads are visible, the wear pads
can be reused. If the pads show uneven wear (front to
back), they should be replaced. Replace pads as a set if
worn or damaged.
3.4.2
Boom Wear Pad Replacement
When replacing a wear pad on the boom, replace both
wear pads on that side of the boom; e.g.: replace top front
left and top front right wear pads at the same time.
Usually, shimming will remain the same when installing
new wear pads. All wear pads are secured to the boom
using different capscrews and washers. When installing
new wear pads, apply Loctite
®
#242 to all wear pad
mounting capscrews. Torque right and left side wear
pads to 50 Nm (36 lb-ft) and torque top and bottom side
wear pads to 90 Nm (66 lb-ft). Grease the new pads and
surrounding area.
Note:
The first shim next to a wear pad always needs to
have the two hole configuration. The remaining
pads (
11
) may have the large slot configuration.
Use shims (
11
) under the wear pads as required to
maintain a maximum gap of 1,5 mm (0.06") (
12
) between
the wear pad on the front and sides of the boom. The gap
at the rear of the boom should be no more than 3 mm
(0.12”).
Shims are available in four thicknesses, 0,5mm (0.02'),
1 mm (0.04”), 1,5mm (0.06”) and 2,0mm (0.08”).
3.4.3
Boom Wear Pad Lubrication
After replacing any wear pad(s), or after prolonged
periods of inoperation, light lubrication of the boom wear
surfaces with a factory authorized grease is recommended
to keep the boom wear surfaces lubricated properly. Light
lubrication of the boom wear surfaces is also
recommended when the machine is stored, to help
prevent rusting.
MA2070
10
10
MAH0870
11
MU4080
12
