Products for articulated vehicle semi-trailers trailers

Fifth wheel couplings and mounting plates
Accessories
Wear limit gauge 2”
The JOST wear limit gauge may be a valuable tool for you.
The lock on JOST fifth wheel couplings is adjusted at the factory
to provide initial horizontal play of approx. 0.3 mm in the
direction of travel with a new king pin.
This longitudinal play may increase to 2 mm as a result of
wear on the lock jaw or wearing ring.
2” fifth wheel couplings (Class G 50) from JOST offer infinite
adjustment to compensate for wear in the coupling lock. Only
82
when this adjustment distance has been exhausted does the
fifth wheel coupling need to be repaired. The JOST wear limit
gauge makes it possible to determine whether the lock on a
2” JOST fifth wheel coupling or a 2” king pin has reached or
exceeded the permitted wearing limit while the coupling is
disconnected and closed.
Order No.: J 1027
für JOST-Sattelkupplungen 50 (max. Spiel 2 mm)
und Königszapfen 50 (49/71 mm)
min.49
(50,8)
c
d
min.71
(73)
Verschleißgrenzenlehre J 1027
Direction of travel
Direction of travel
ø 73
ø 50,8
2
Bush
63,9
Locking bar
Lock jaw (worn)
new = 73,0 mm
min = 71,0 mm
new = 50,8 mm
min = 49,0 mm
Direction
of travel
Wearing ring (worn)
Gauge flange
(Locking mechanism shown
at the limit of wear)
Note:
Further instructions for testing when coupled are given in the JOST instructions for fifth wheel couplings.