Manitowoc National Crane NBT30H-2, Service Manual

Page: 99 / 194

4
10
National Crane
03-20-2019 Control # 613-06
4-7
NBT30H-2 SERVICE MANUAL BOOM MAINTENANCE
2. Attach the rear wear pads on bottom of the 4
th
section as
per removal tags. Use Loctite 243 blue on all wear pad
mounting capscrews (Figure 4-7).
3. Install the 4
th
section boom into the 3
rd
section. Slide in
until about 150 cm (5 feet) of the 4
th
section extends
from the 3
rd
section.
4. Assemble the bottom front wear pads for the 3
rd
section
as per removal tags and attach to the pad plate
(Figure 4-8).
5. Using an appropriate lifting device, lift the 4
th
section to
allow for wear pad/pad plate installation in front of the
3
rd
section.
6. Install the wear pad/pad plate assembly and slide the
sections together within 30 cm (12 inches) of full
retraction.
7. Install the cable guide and upper spacer to the front of
the 3
rd
section.
FIGURE 4-6
1
2
3
4
5
6
7
8
9
11
12
13
12
13
10
Item Component
1 Spacer
2 Bearing
3 Sheave
4 Pin
5 Grease Fitting
6 Cap Screw
7 Collar
8 Lock Nut
9 Pin
10 Grease Fitting (2)
11 Link
12 Bearing
13 Sheave
Item Component
Left Side
Right Side
FIGURE 4-7
Rear of 4
th
Section
Cap Screws
Wear Pad
FIGURE 4-8
Wear Pad
Plate
Shim
(as required)
Shim
(as required)
Wear Pads