National Crane 01-22-2019 Control # 051-08 4-17
1300A BOOM MAINTENANCE
TORQUE VALUES for Second Nut:
Inch Series with Coarse Threads (UNC)
Metric Series with Coarse Threads
BOOM INSTALLATION ON THE TRUCK
1. Extend and set the outriggers.
2. Attach a lifting device at the boom CG and lift the boom
on the truck and lower to the boom rest.
3. Line up the boom with the attach point on the turret.
4. Install the boom pivot pin (Figure 4-5).
5. Attach a lifting device to the rod end of the lift cylinder
raise the lift cylinder so that the pivot pin can be installed
(Figure 4-5).
6. Install the lift cylinder pivot pin in the bottom of the 1
st
boom section.
7. Install the hoist as described in Hoist Installation on
page 5-3.
8. Reinstall telescope cylinder and hoist hydraulic lines as
per removal tags.
LIFT CYLINDER INSTALLATION
1. Attach a lifting device to the lift cylinder.
2. Raise the lift cylinder to the truck bed under the boom.
3. Line up the lift cylinder with the attach point on the turret
and install the pivot pin (Figure 4-5).
4. Raise the rod end of the lift cylinder to the attach point
under the boom and install the pivot pin.
Cable end
Thread Size
Minimum
Nut
Strength
GRADE
Nut Type
TORQUE
ft lbf
1/2-13 SAE 2
Hex Jam
(HALF)
12
5/8-11 SAE 2
Hex Jam
(HALF)
31
3/4-10 SAE 2
Hex Jam
(HALF)
47
7/8-9 SAE 2
Hex Jam
(HALF)
63
1-8 SAE 2
Hex Jam
(HALF)
199
1 ¼-7 SAE 2
Hex Jam
(HALF)
203
1 ½-6 SAE 5
Hex Jam
(FULL)
250
1 ¾-5 ASTM B
Hex Jam
(FULL)
250
Cable end
Thread Size
Minimum
Nut
Property
Class
Nut Type
TORQUE
Nm
M16x2 5
Hex Jam
(THIN)
26
M20x2.5 5
Hex Jam
(THIN)
66
DANGER
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations.
DANGER
Ensure the lifting device is capable of supporting the
boom assembly.
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