National Crane Published 10-30-2014 Control # 040-09 7-19
1400H OPERATOR AND SERVICE MANUAL INSTALLATION
CRANE INSTALLATION
1. Determine installation position for the crane considering
the operating area of the crane, space for saddle tanks,
truck frame crossmembers, or anything that might affect
installation and be sure the frame is clear of any
obstructions that might interfere with proper installation.
The top and bottom subbase reinforcing plates must
extend past the RSOD mounting sub-assembly. If this is
not achievable, due to a long cab to tandem (CT)
dimension or special mounting configuration, contact the
factory before proceeding.
2. Center the subbase on the chassis at the proper
location. Loosely assemble two mount anchor
assemblies per side to subbase and look for interference
with truck crossmembers.
3. If subbase does not fit tightly on truck frame at all
locations, clamp them together to remove gaps.
4. Making certain that subbase is tight against truck frame
and mount anchor assemblies are tight against bottom
of subbase tubes, drill four 3/4 in diameter holes through
the truck frame at each mounting plate using the holes in
the mount anchor assembly as pilot holes. Install 3/4 in
diameter Grade 8 bolts, washers and nuts in mounting
plates.
5. With RSOD stabilizers retracted, determine the distance
from the top of the stabilizer frame cross tube to ground
level that will give you approximately 11 in (28 cm) of
ground clearance to the bottom of the stabilizer foot.
This will give approximately 14 in (35 cm) of stabilizer
penetration. Before final mounting the RSOD brackets
make sure that the tops of the stabilizer vertical cylinder
are below the top of the torsion box. Keep in mind that
the truck frame may settle slightly with the addition of the
crane frame, boom, bed and payload. Using this
determined vertical dimension, position the RSOD
mounting sub-assembly approximately 12 in (30 cm)
behind the rear tires. Check for truck frame bolt or rivet
interference. Cut clearance holes for rivet heads. Mark
and drill six 3/4 in diameter bolt holes as specified
through RSOD mounting sub-assemblies and truck
frame and install six 3/4 in diameter Grade 8 bolts,
washers and nuts per side. Tighten to proper torque.
MOUNT
ANCHOR
ASSEMBLY
RSOD MOUNTING SUB-
ASSEMBLY FOR RSOD
STABILIZER
SUB BASE
TUBES
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