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Tractor mounted snow plow
Operating manual
PSV, PSV Up, PSV Up H
the fourth system is the patented construction of the mount which protects the plow from
pressure greater than 6 tons and from sudden collisions with an immovable obstacle. It works by
absorbing the energy of the collision through partial or complete breaking of the 8 M10 class 8.8
bolts, and through the plastic deformation of the mount pressure plates (Fig. 22). The system is
not applied in PSV Up (H).
Pressure
plate
Securing
bolts
Mount
frame
Fig. 22. Replaceable mount with overload protection
the fifth system is overloading safety device which protects PSV Up (H) plow from heavy snow
pressure as well as from sudden hitting of a solid obstacle. Factory set hydraulic accumulator
(Fig.
) is for 9 MPa pressure and whenever this value is exceeded the cylinder is not able to
23
handle it and in result is retracted backwards. The force value is dependant upon size of
hydraulic cylinder used in a particular model as well as point of force application Tab. 5. The
safety device causes the cylinder to surrender and in result retract the plow's segment backwards
whenever admissible force values are exceeded. Bear in mind, that that with complete retraction
of cylinder, the safety device !! is not going to operate!! as there is no possibility of any motion
of cylinder rod. In such case operate the plow with particular attention.
Hydraulic
Shield
accumulator
cylinder
Fig. 23. Overloading safety device of PSV Up Plow
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