Doosan D50S-5 Operation & Maintenance Manual page 23

Safety Section Safety Section
Lift Truck Stability Base Lift Truck Stability
For the lift truck to be stable (not tip over forward or For the lift truck to be stable (not tip over forward or
to the side), the CG must stay within the area of the to the side), the CG must stay within the area of the
lift truck stability base – a triangular area between lift truck stability base – a triangular area between
the front wheels and the pivot of the steer wheels. If the front wheels and the pivot of the steer wheels. If
the CG moves forward of the front axle, the lift truck the CG moves forward of the front axle, the lift truck
will tip forward. If the CG moves outside of the line will tip forward. If the CG moves outside of the line
on either side of the stability base, the lift truck will on either side of the stability base, the lift truck will
tip to the side. tip to the side.
Dynamic forces (braking, acceleration, turning) Dynamic forces (braking, acceleration, turning)
also affect stability and can produce tipover also affect stability and can produce tipover
even when the CG even when the CG is within the stability triangle.
Capacity Load (Weight and Load Center) Capacity Load (Weight and
The capacity load of the lift truck is shown on the The capacity load of the lift truck is shown on the
capacity/nameplate riveted to the truck. It is capacity/nameplate riveted to the truck. It is
determined by the weight and load center. The load determined by the weight and load center. The load
center is determined by the location of the CG of the center is determined by the location of the CG of the
load. load.
The load center shown on the nameplate is the The load center shown on the nameplate is the
horizontal distance from the front face of the forks, horizontal distance from the front face of the forks,
or the load face of an attachment, to the CG of the or the load face of an attachment, to the CG of the
load. The location of the CG in the vertical direction load. The location of the CG in the vertical direction
is the same as the horizontal dimension. is the same as the horizontal dimension.
Remember that, unless otherwise indicated, the Remember that, unless otherwise indicated, the
Base
WARNING WARNING
is within the stability triangle.
Load Center)
capacity load shown on the nameplate is for a capacity load shown on the nameplate is for a
standard lift truck with standard backrest, forks and standard lift truck with standard backrest, forks and
mast, and having no special-purpose attachment. In mast, and having no special-purpose attachment. In
addition, the capacity load assumes that the load addition, the capacity load assumes that the load
center is no further from the top of the forks than it is center is no further from the top of the forks than it is
from the face of the backrest. If these conditions Do from the face of the backrest. If these conditions Do
not exist, the operator may have to reduce the safe not exist, the operator may have to reduce the safe
operating load because the truck stability may be operating load because the truck stability may be
reduced. The lift truck should not be operated if its reduced. The lift truck should not be operated if its
capacity/nameplate does not indicate capacity load. capacity/nameplate does not indicate capacity load.
NOTE: NOTE: If the load is not uniform, the heaviest If the load is not uniform, the heaviest
portion should be placed closer to the portion should be placed closer to the
backrest and centered on the forks. backrest and centered on the forks.
1. 1. Capacity/Nameplates Capacity/Nameplates
forklifts sold by DOOSAN shall not be removed, forklifts sold by DOOSAN shall not be removed,
altered or replaced without DOOSAN's approval. altered or replaced without
2. 2. DOOSAN assumes no responsibility for lift trucks DOOSAN assumes no responsibility for lift trucks
placed in service without a valid DOOSAN placed in service without a valid DOOSAN
Nameplate. Nameplate.
3. 3. If necessary to change your specification, If necessary to change your specification,
contact your DOOSAN lift truck dealer. contact your DOOSAN lift truck dealer.
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NOTICE NOTICE
originally originally attached attached
DOOSAN's approval.
to to