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Body Builders Layout Book
23
FMVSS AND CMVSS 105 HYDRAULIC BRAKE AND
126 ELECTRONIC STABILITY CONTROL SYSTEM
COMPLIANCE
GUIDELINES
FOR
F-SERIES
ALTERED VEHICLES WITH A GVWR OVER 3629 kg
[8000 lb] INCLUDING PICKUP BOX REMOVAL –
REFER TO THE INCOMPLETE VEHICLE MANUAL
(IVM) FOR ADDITIONAL INFORMATION
105 INFORMATION
Vehicle weights and dimensional information required
for center of gravity calculations are available in the
Source Book. See your local Ford Dealer and refer to
appropriate model year and specific vehicle for the
required information.
The abbreviated definitions and a vehicle diagram
which are required for the equations in the FMVSS 105
segment of this document are shown on the next page.
The vehicle, as altered, will conform to FMVSS and
CMVSS 105, Hydraulic and Electric Brake Systems,
provided that:
●
No alterations, modifications, or replacements are
made to the following:
– Service or parking brake system
– Antilock brake system
– Vacuum system
– Wheels and tires
– Brake system indicator lamp and wiring
– Brake system reservoir labeling
– Suspension ride height or spring rate
– Hydro-boost system
– Power steering pump and lines if used with Hydroboost
– Engine belt drive system
●
Any removal of a Ford Motor Company body or
chassis component is accompanied by the addition
of equal weight.
2015
SAFETY / EMISSIONS
U.S. AND CANADA SAFETY STANDARDS (Cont'd)
SAFETY / EMISSIONS
Vehicles with a GVWR of 4536 kg [10,000 lb] or less
do not exceed the Maximum Unloaded Vehicle
Weight value in Table 7.
●
The applicable GAWRs and GVWR weights are not
exceeded.
●
The completed vehicle must have a vertical center of
gravity (Equation E) of 48.0 inches or less when
measured from the ground.
●
The front axle curb weight of the completed vehicle
(incomplete vehicle weight + min SUB weight, listed
in Table 6, may be reduced by no more than 10% for
SRW or 25% for DRW vehicles, using the front axle
ground reaction as manufactured by Ford Motor
Company.
●
The rear axle curb weight of the completed vehicle
(incomplete vehicle + min SUB weight, listed in Table
6, must be the same or greater than the rear axle
ground reaction as manufactured by Ford Motor
Company.
REFERENCE: Equation F can be used to determine
the completed vehicle’s horizontal center of gravity
(CGh). Abbreviated definitions and a vehicle diagram
are provided to assist with the equation on the next
page,
MODEL YEAR
Example:
F-250 (4x4) Pickup Box Removal with 137 inch WB
and 8800 lb GVWR
Known:
F-250 (4x4) 137 inch WB, 8800 lb GVWR, 5.4L pickup
box removal vehicle.
Wb = 675 lb
Wrb = 600 lb
Wrc = 1531 lb
Wc = 4684 lb
CGvb = 35 inches
CGvc = 31.0 inches
Wl = GVWR - (Wb + Wc + 400) = 3041 lb
(132)(3041)
Wrl =
= 2930 lb
137
●
SUPER DUTY F-SERIES
PASSENGER LOAD TABLE
CGhp
61.2 [in]
GVWR [lb]
P [lb]
8500 - 10,000
400
10,001 - 19,000
500
SUPER DUTY F-SERIES
PASSENGER CGvp
From Equations E & F:
All Seats
CGv =
4x2
4x4
40.3 [in]
43.8 [in]
CGvp
35(675) + 31(4684 + 3041) + 43.4(400)
= 31.9 in
8800
(600 + 1531 +
CGh =
400(61.2)
+ 2930) x 137
137
= 81.6 in
8800
Since CGv is less than 48” and CGh is less than 137”,
this vehicle is acceptable with the 675 lb SUB.
EQUATION E
CG v =
( ) + CG (W
CG vb Wb
vc
c
)
()
+ W l + CG vp P
GVWR
If CGv exceeds 48", do
one or more of the
following, as required,
to get CGv < 48"
If CGh exceeds
wheelbase, do one or
more of the following,
as required, to get
CGh < WB
1. Move heavy objects to
lower areas to lower
the CG.
1. Move heavy objects
forward to shift the CG
forward.
2. Remove heavy
objects with CG’s
greater than 48”
above the ground.
2. Remove heavy
objects which are aft
of the rear axle.
3. Add weight as low as
possible (lower than
48”) to bring down
the CG.
3. Add weight as far
forward as possible
(forward of the rear
axle) to shift the CG
forward.
EQUATION F
CG h =
(W rb + W rc + (
P x CG
GVWR
WB
hp
)+ W ) x WB
rl
(Cont'd next page)
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