PREVOST X3-45 COACH 2018 Operator's Manual page 27

NOTE
The minimum requirement
weighing up to 20,000 lbs. when coupled to a
20,000 lbs. Prevost Trailer Hitch is as per the
following:
1.
Trailer must comply with Federal Motor
Carrier Safety
regarding trailer breaking capability.
2.
The trailer coupling attachments meet the
following minimum
requirements :
Longitudinal tension and compression:
o
(1.5 x GVWR of trailer)
Transverse thrust: (0.5 x GVWR of
o
trailer)
o Vertical tension and compression: (0.5
x GVWR of trailer)
Loads indicated must be applied without
incurring loss of attachments or distortion or
failure which could affect the safe towing of
trailer.
3.
The ball and trailer coupling should meet
the following minimum
requirements without incurring failure:
Longitudinal tension and compression:
o
(Gross Trailer Weight of trailer x 3)
o Transverse thrust:
Weight of trailer x 1)
Vertical tension
o
(Gross Trailer Weight of trailer x 1.3)
In this case, failure is identified as the point at
which the coupling or ball will accept no
additional test load without separation of the
ball from the coupling ball socket, or the
occurrence of a metal fracture of either
coupling ball or coupling assembly, which
results in separation of the ball from the
coupling ball socket.
4.
Two lengths of safety chain shall be used.
The strength rating (minimum breaking
force) of each individual chain and its
connecting means shall be equal to, or
exceed the trailer GVWR.
5.
Towing vehicle must be equipped with
engine or transmission retarder. The
engine or the transmission retarder on the
vehicle must be functional at all time (to be
inspected frequently).
for a trailer
Regulations 393.52
static test load
test load
(Gross Trailer
and compression:
PA1627 X3-45 Operator's Manual
Coach Exterior 2-15