National Crane 03-20-2019 Control # 613-06 9-15
NBT30H-2 SERVICE MANUAL CRANE INSTALLATION
6. Use channels fabricated from 100,000 psi yield material
that are the same size as the truck frame. Weld these
channels to the ends of the existing truck frame
channels. Bevel the ends of the channels to get 100%
weld joints with Grade 90 weld material. Fabricate an
inner channel of the same thickness as the truck frame
channels to span the weld joint for at least 30 cm (12
inches) on each side of joint. Plug weld this channel to
the inside of the truck frame, then skip weld the inside
edge of the top and bottom flanges to the truck frame
flanges.
MOUNTING THE CRANE
Make sure the truck has been configured to meet the
minimum truck, PTO, and frame strength requirements as
described on page 9-1 through page 9-15. Mounting the
crane to the truck frame is as follows:
Weld 152 (6)
Skip 152 (6)
Weld 152 (6)
Skip 152 (6)
Weld 304 (12)
Reinforcing under crane
Cut outs Replace as much
material as possible. Butt weld
Overload spring stop.
Remove and replace.
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Truck frame (REF)
Reinforcing (REF)
152 (6)
152 (6)
152 (6)
152 (6)
Butt weld
FIGURE 9-10
Note: All dimensions are millimeters (inches)
WARNING
It is mandatory that swing bearing and crane anchor bolts
be inspected and re-torqued after the first 300 hours of
crane operation and every 500 hours thereafter. The bolts
may loosen and cause the crane to separate from the
carrier which will result in damage to the crane and
possible injury or death to personnel.
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