Proper Usage - JOST JSK 37C Montage- Und Betriebsanleitung

1 Proper usage

1.1 Application
Fifth wheel couplings provide the link between the tractor unit and the semi-
trailer. They are designed for mounting on a tractor unit.
The fifth wheel coupling and mounting plate are connecting parts that must
comply with very high safety requirements and must also undergo design
approval tests.
Modifications of any kind will render both the warranty and the design approval
void and therefore also cancel the vehicle‟s operating license.
JOST fifth wheel couplings, e.g. type JSK 37, are specified to comply with
Directive 94/20/EC Class G50 and are to be used together with king pins of
class H50 and class J mounting plates or with comparable licensed
equipment.
1.2 Design
The fifth wheel coupling is specified with the vehicle by the vehicle
manufacturer (the design must comply with Directive 94/20/EC, Appendix VII).
In addition to the fifth wheel coupling the D value is a criterion for the load
capacity of fifth wheel couplings and mounting plates.
It can be calculated using the following formula:
D = Drawbar value [kN]
g = 9.81 m/s²
R = Maximum gross weight of the semi-trailer [t]
T = Maximum gross weight of the tractor unit including U [t]
U = Maximum imposed load [t]
0 6 , T R
D g [ kN
T R U
]
Specimen calculation:
T = 17 t
D , 9
R = 33 t
U = 10,5 t
The maximum load data for JOST fifth wheel couplings are set out on the type
plate and the appropriate JOST catalogue sheets. They are applicable for
proper usage pursuant to Directive 94/20/EC. If they are subject to additional
dynamic forces, for example if they are used on uneven road surfaces or on
construction sites, do not use the complete imposed load and D value or use a
stronger fifth wheel coupling or consult JOST.
1 EC license number
2 Maximum D value in kN
3 Maximum imposed load U in t
Each fifth wheel coupling has a serial number, which is embossed on the
factory plate and also on the edge of the plate. This is designed to give the
coupling a unique identity.
1.3 Safety
The symbol @1, shown
characteristics which can lead to a direct risk to the equipment
and people. Be aware to the information with @1 symbol and
follow the related specifications correctly to ensure the safety and
reliability of the equipments.
JSK 37C
0 6 , 17 33
81 83 6 , kN
17 33 10 5 ,
4 Article no. and type
5 Serial no.
here on the left, indicates
17