BOOM MAINTENANCE NBT30H-2 SERVICE MANUAL
4-4 03-20-2019 Control # 613-06
BOOM REMOVAL FROM TRUCK
The boom and hoist are removed from the truck as one
assembly.
1. Extend and set the outriggers. The boom must be
completely retracted and stowed in the boom rest.
2. If equipped, remove swing around jib according to
“Section 4, Setup” of the Operator’s Manual.
3. Remove the hook block or downhaul weight and wind up
the rope on hoist drum. Shut down the truck engine.
4. Attach a lifting device to the rod end of the lift cylinder
and remove the boom lift cylinder pin keeper and pin
from bottom of the 1
st
section boom (Figure 4-4).
5. Lower lift cylinder to a suitable support.
6. Tag and disconnect the hydraulic lines boom telescope
cylinder. Cap all lines and ports.
7. Attach a lifting device at the boom CG and raise the
boom until the weight is removed from the boom pivot
pin. Remove boom pivot pin keeper and pin (Figure 4-4)
and lift boom off the turret.
Lift Cylinder Removal
This procedure assumes the boom has been removed.
1. Tag and disconnect the hydraulic lines attached to the lift
cylinder.
2. Attach a lifting device to the lift cylinder.
3. Remove the lift cylinder pivot pin at the turret.
4. Lift the cylinder off the truck.
Boom Length Boom Weight*
100 ft 8,740 lb (3964 kg)
110 ft 9,585 lb (4348 kg)
* Includes single hoist
CAUTION
Fall Hazard!
Do not, under any circumstances, work at an elevated
height without using proper fall protection as required by
local, state or federal regulations.
Proportioning Cable
Attach Point at Rear
of 3
rd
Section
Proportioning cable Sheave
at Front of 2
nd
Section.
FIGURE 4-3
WARNING
Crushing Hazard!
Ensure the lifting device is capable of supporting the
boom assembly.
FIGURE 4-4
Lift Cylinder
Pivot Pin Boom
Boom
Pivot Pin
Lift Cylinder
Pivot Pin
Turret
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