wheel with forks and semiautomatic
weather air conditioner. The use of a
locking for SAE J700 kingpin. The fifth
Class I or Class II controlled substance
wheel shall be capable of being
refrigerant is prohibited. Air conditioning
system shall conform to TMC RP 418.
uncoupled by the operator standing on the
driver's side of the vehicle. Uncoupling
3.5
VEHICLE TYPES.
action shall be protected by a secondary
The cab-to-axle dimension specified for
manual lock, preventing movement of the
the various vehicle types may be reduced
uncoupling lever until the secondary lock
by not more than 50 mm (two inches)
is manually released. The fifth wheel
when the vehicle is furnished with tilt type
shall have a visual indicator or latching
cab (see 3.4.12).
mechanism to ensure a positive lock of
the kingpin. The vertical load capacity
3.5.1
TYPE I (CHASSIS, WITH CAB).
and the drawbar pull capacity of the fifth
Type I vehicles shall have specified one of
wheel shall be not less than the loads
the usable cab-to-axle (CA) dimensions
imposed with the vehicle loaded to the
shown in Figure 4 below. Usable cab-to-
required GVW and GCW.
axle is defined as the distance from the
most rearward vehicle obstruction that
3.5.2.1
FIFTH WHEEL LOCATION.
would interfere with body mounting to the
The location of the fifth wheel, unless
centerline of the axle. Load area for the
otherwise specified, shall load both front
purpose of determining weight distribution
and rear axles to their maximum rated
(see 3.2.8) shall be as specified. Chassis
capacity simultaneously. The clearance
shall be suitable for subsequent mounting
from the centerline of the kingpin to the
of the size and type of body and
cab, or to the vertical spare tire assembly
equipment specified.
Required CA
when furnished, or pogo stick type hose
dimensions must be specified when
tender when furnished, shall be not less
vehicle order is submitted.
than 1620 mm (64 inches).
When
additional equipment to be mounted
Figure 4
behind the cab is specified, the 1620 mm
Cab-axle (CA)
(64 inches) shall be measured to the
CODE
LENGTHS
RECOMMENDED
rearmost point of a pogo stick to be
(for fixed body)
MAXIMUM BODY
mounted behind the additional equipment.
(select one)
LENGTHS
The CA may be increased to provide
CABA
150/160 cm (59/60 in) 2.5 m/8 ft
CABC
180/190 cm (71/72 in) 3.0 m/10 ft
needed clearance when additional
CABF
210/220 cm (83/84 in) 3.6 m/12 ft
equipment is added behind the cab.
CABJ
260/270 cm (101/108 4.3 m/14 ft
in)
3.5.2.2
FIFTH WHEEL MOUNTING.
CABM
300/320 cm (119/124 4.9 m/16 ft
in.)
Fifth wheel mounting shall conform to
CABP
340/360 cm (136/138 5.5 m/18 ft
Federal Motor Carrier Safety Regulation
in)
393.70(b).
CABT
380/400 cm (150/156 6 m/20 ft
in)
CABW 420/440 cm (167/171 6.6 m/22 ft
3.5.2.3
FIFTH WHEEL HEIGHT.
in)
The unladen level height of the fifth wheel
Specify as needed when other than types covered by
shall be 1219 mm (48 inches), plus or
Figure 4 are required.
minus 25 mm (1 inch), above ground level
for a fore and aft rocking fifth wheel, 1400
3.5.2
TYPE II (TRUCK TRACTOR).
Type II tractors shall conform to 3.5.2.1
mm (55 inches), plus or minus 25 mm (1
through 3.5.2.6 with the fifth wheel on 4x2
inch), for a full oscillating fifth wheel on
vehicles mounted on a stationary base.
4x2, and 1520 mm (60 inches), plus or
The fifth wheel shall be a fore and aft
minus 25 mm (1 inch) for a full oscillating
rocking, 910 mm (36 inch) diameter fifth
fifth wheel on 4x4.
Page 22 of 79
to verify that this 7 4Y
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business