PREVOST X3-45 2011, Operator'S Manual

Page: 23 / 214

Coach Exterior 17
WARNING
Pulling a trailer weighing more than the
recommended maximum gross weight may
cause engine and transmission overheating,
and also possible hitch failure.
NOTE
Pulling a trailer over long distances is
considered as a "severe operating condition"
for the vehicle and therefore, power plant
requires more frequent servicing.
NOTE
The minimum requirement for a trailer
weighing up to 20,000 lbs when coupled to a
20,000 lb Prévost Trailer Hitch is as per the
following:
1.
Trailer must comply with Federal Motor
Carrier Safety Regulations 393.52
regarding trailer breaking capability.
2.
The trailer coupling attachments meet the
following minimum static test load
requirements :
o
Longitudinal tension and compression:
(1.5 x GVWR of trailer)
o
Transverse thrust: (0.5 x GVWR of
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 test load
requirements without incurring failure:
o
Longitudinal tension and compression:
(Gross Trailer Weight of trailer x 3)
o
Transverse thrust: (Gross Trailer
Weight of trailer x 1)
o
Vertical tension and compression:
(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).