Braun FMVSS User Manual

Braun Corporation FMVSS No. 403 Quick Reference Installation Sheet 32553 Rev. A

Braun Corporation FMVSS No. 403

Quick Reference Installation Sheet 32253

“DOT — Public Use Lift”

NHTSA Vehicle Physical Requirements

Vehicle Requirements:

All vehicles with a GVW over 6000 lbs.
and with unmodified OEM framerails.

Alternative floor structures are allowed
providing the installed lift system pass­es all FMVSS 403 requirements.

Mounting Bracket Requirements:

A maximum distance of 16
outermost mounting bracket to the
end of the cassette.

All four mounting brackets must be
connected to the framerails.

" from the

B

A

C

Figure B

“DOT - Public Use Lift” verifies this platform lift
meets the “public use lift” requirements of FMVSS
No. 403. This lift may be installed on all vehicles
appropriate for the size and weight of the lift, but
must be installed on buses, school buses, and
multi-purpose passenger vehicles other than
motor homes with a gross vehicle weight rating
(GVWR) that exceeds 4,536 kg (10,000 lb).

CLE

ER

VEHI

CHASSIS MEMB

All-thread
Mounting

Brackets

Door Opening Dimensions

Vehicle lift access door opening
must meet specified dimensions.

Minimum Clear Door

A

Opening Height

B

Clear Door Opening Width

C

Maximum Floor-to-Ground

16”

Maximum

CHASSI

VEHICLE

S MEMB

Rev: A

ER

Figure A

855

NA

43-1/2"

50"

Locate Lift Mounting Brackets

1

Locate All-Thread Mounting
Brackets

Figure C

CENTER ACROSS

VEHICLE FRAME

1. Open both doors to 90°.

2. Locate center of door opening
(between doors). Mark the
center point.

3. Transfer center point to the
vehicle frame. Using a front­to-rear framing member as a
guide, transfer the center point
across chassis to opposite side
front-to-rear framing member
(must be 90° to door opening).
Lift mounting bracket positions
are based on this center line.

4. Measure 22-3/8" to left and
right of the center line to
achieve the 44-3/4" center-to­center spacing of all-thread
mounting studs.

5. Clamp the mounting brackets
securely in place (all-thread

studs must be vertical).

Engage Platform Manual
Release System: The lift

cable-activated platform
manual release is disengaged
during shipment to prevent
potential drive chain stretch.
Handle the lift with care. En-

gage manual release before

attempting to install (raise, tilt
or move) the lift.

A

RNING

W

Engage manual
release before
attempting to install
(raise, tilt or move)
lift. Failure to do so
may result in serious
bodily injury and/or
property damage.

All-Thread

Mounting
Brackets

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CENTER IN

DOOR OPENING

C

L

90

DOOR

22-3/8"

OPE

44-3/

NING

22-3/8"

4"

Braun Corporation FMVSS No. 403 Quick Reference Installation Sheet 32553 Rev. A

Secure Lift

2

Attach Mounting Brackets to
Vehicle Frame

Mounting bolts must be routed
horizontally through the verti­cal face of the “L” brackets and
framing members as shown in
Figures D, E and F.

Eight 3/8-16 x 1-1/2" hex bolts
are supplied for bolting the all­thread mounting brackets to the
frame (two per bracket). Oval
slotted mounting holes are pro­vided in the mounting brackets
to allow adjustment. Carefully
drill 25/64" (.390") diameter
mounting holes at the center of
the oval mounting slots.

Channel Frame Applications:
Secure mounting bolts as speci­fied in Figure D.

Box Frame Spacers: Position
tubing spacers as shown at
right to prevent collapsing the
box frame. Carefully drill a
25/64" (.390") diameter mount­ing hole through one side of the
box frame. Drill a 5/8" (.625")
diameter hole through the
opposite side of box frame to
allow installation of spacer. Cut
spacer tubing to length (equal
to thickness of box frame).

Note: A longer 3/8-16 bolt will
be required for box frame appli­cations. Secure mounting bolts
as specified in Figures E and F.

All fasteners must meet FM­VSS 571.403 Section 6.3.

Shipping Block Removal:

Wood blocks are placed in the
lift housing to prevent lift dam­age during shipment. Remove
shipping blocks from platform
and carriage before running

(activating) lift. Refer to
Shipping Block Removal

Instruction 28942.

Hex
Nut

Lock

Washe r

Flat

Washe r

All-Thread

Bracket

“Box” Framing Member

Figure E

All-Thread

Bracket

3/8-16 x 1-1/2"

Hex Bolt

Flat Washer

All-Thread

3/8-16

Hex Bolt

Bracket

Flat Washer

“Box” Framing Member

Figure F

“Channel” Framing Member

Figure D

3/8-16 x 1-1/2"

Diameter

Box
Framing
Member

Assembled

Washer

25/64"

Hole

Spacer

VEHICLE

BO

X FRAME

Hex Bolt

Flat

Flat

Washer

Hex
Nut

Lock

Washe r

Spacer

5/8"

Diameter

Hole

Hex
Nut

Lock

Washer

Spacer Tubing
Length: Equal

to thickness of
box frame.

Figure G

ER

CLE

VEHI

CHASSIS MEMB

Align mounting clamps
with all-thread studs.

Position and secure lift.

Thread two 3/4" hex jam nuts fully
onto each mounting bracket all-thread
stud. Place one large diameter flat
washer onto each all-thread stud (use
tape to hold in place). See Figures G
and H.

Carefully position lift under vehicle
(aligned with mounting brackets).
Position (slide) the four lift mounting
clamps along the sides of the lift hous­ing until aligned with mounting bracket
all-thread studs. See Figure G.

Height Adjustment

The lift housing must be
aligned with vehicle chas­sis. Adjust the 3/4" hex jam

nuts on the all-thread mount­ing studs at all 4 corners of
the lift until dimensions A, B, C
and D are equal (within 1/16").
See Figure J.

In-Out Positioning

Position the lift to achieve a 2”
overlap between the deployed
inboard barrier and the vehicle
floor.

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Tighten upper set of 3/4" hex
jam nuts (with flat washer)
down to the lift mounting
clamps. Tighten jam nuts.
Torque Specifications: 100
to 120 foot pounds.

ER

CLE

VEHI

S MEMB

CHASSI

Note: The two outboard mounting
brackets should be positioned a
maximum of 16” from the end of the
cassette. See Figure J.

Carefully raise lift into position as high

as possible (height adjustment outlined
below). Place one large diameter flat
washer onto each mounting bracket all­thread stud. Thread two 3/4" hex jam
nuts fully onto each all-thread stud (up
against lift mounting clamp).

All-Thread

Stud

Flat

Washer

A

Figure H

CHASSIS MEMB

CHASSI

Lift

Jam Nuts

Clamp

Lift Clamp

Jam Nuts

Jam Nuts

Flat Washer

Lift Clamp

Flat Washer

Jam Nuts

Shift lift and mounting brackets
left-to-right as needed (lift must
be centered in door opening).
Tighten the 3/8" bolts securing
mounting brackets to the frame.
Torque Specifications: 25 to 30
foot pounds.

B

CLE

ER

VEHI

VEHICLE

CHASSIS MEMBER

D

16”

Max

imum

VEHICLE

S MEMBER

Figure I

Dimensions
A, B, C and D

must be equal

(within 1/16

Lift

Housing

Lift

Housing

").

Figure J

C

Braun Corporation FMVSS No. 403 Quick Reference Installation Sheet 32553 Rev. A

Electrical, Hydraulic and Interlock

3

Min.

Pump Module Mounting

Mount reinforcement “L” bracket
to pump mounting bracket as
shown in Figure K. Secure
pump mounting bracket to floor
using four 5/16" lag bolts.

Check under vehicle for
obstructions before drilling,
cutting holes or installing
floor mounting hardware.

Note: Locate and drill pump

module mounting holes, floor
grommet 3" diameter hole and
manual release 7/8" diameter
hole before mounting pump.

Cable-activated Manual
Release: The T-handle must

be mounted inside the vehicle.
The cable must operate freely
(no kinks or bends). Warning
tag 81823 must remain attached
to the handle. Remove handle
for installation.

Pump Ground Cable:

One ground cable is pump
mounted. Route this ground cable
through the floor grommet and con­nect to a vehicle framing member
(see Figure L).

5/16"

External Tooth

Star Washer

9/32"
Diameter
Pilot Hole

Chassis

Figure L

Ground Cable Mounting

5/16"

Lag Bolts

(typical - 4)

1/4-20 x 3/8"
Hex Screws

Lock

Washer

Reinforcement

“L” Bracket

Cable-activated

Manual Release

(from lift)

7/8" Diameter

Mounting Hole

Vehicle Battery Ground Cable:

A ground cable (minimum 2 gauge)
must be connected from vehicle
battery negative post to the same
vehicle framing member the pump
ground cable is attached to.

Thread
Cutting

Screw

1-3/4”

to

Wall

Pump

Mounting

Bracket

Pump

must

face

Out

Ground Cable Corrosion:

When mounting ground
cables, remove undercoat­ing, dirt, rust, etc. from
framing member around
mounting holes. Apply
protective coating to mount­ing holes to prevent corro­sion. Failure to do so will

void warranty of certain
electrical components.

Mount
Pump

Vertical

Figure K

Through-Floor

Cable and Hose

Grommet

(3" Diameter

Mounting Hole)

Note: Seal the
floor cable and
hose grommet
following installa­tion procedures
(fill with silicone).

Note: All
wiring harness
connections

must be
inside the
vehicle.

es

Main Lift Wiring

Harness

m

Strobe Alar

shold Mat

Thre

tform Lights

res labeled)

Pla

(wi

Housing/Carriage Har­nesses:

Route two main wiring
harnesses from lift through
floor grommet to pump
module. Connect to mat­ing harnesses at pump.

Hydraulics:

Remove the plug
from 1/4" diameter
clear vent tube.
See Figure N.

Route hydraulic
hose assembly
through floor
grommet to quick­disconnect fitting at
lift. Connect hose.

Note:

Remove
plug from
vent tube.

Connect red positive
(+) power cable here
(from Circuit Sentry).

To Lift

Beeper/Strobe Alarm
and Platform Lights:

Connect harnesses to
mating harnesses at
pump (labeled). Detailed
installation instructions
supplied with kits.

Circuit Sentry:

Power Cable

Install Circuit
Sentry as shown
in Figure M. At­tach power cable
and lead cable as
detailed.

Figure M

Figure N

1

Disconnect
and remove
eye terminal

Threshold Warning Sensor:

Connect harness to mating har­ness at pump module (labeled).
Mat must be installed on a flat

rigid surface. Inboard edge of mat
must be minimum 18" from edge
of finished floor or stepwell.

Lead

Cable

try

Circuit

Sen

Bat.

Aux.

stic

1/8" x 4" x 4"

Pla

Vehicle and Lift Interlocks

The pump module is equipped
with a lift interface 9-circuit
connector (female socket).
A mating 9-circuit connector
(male plug) is supplied.

To meet minimum
NHTSA requirements,
connect to vehicle inter­lock harness as outlined
in Figure N (Steps 1-4).

2

Disconnect

Connect

Pos.

Neg.

12"

Max.

4

To Interlock

3

Connect vehicle
interlock signal wires

Jumper Wire

Install black jumper wire
last. Install the black jumper

wire in pump Terminal Strip
terminals 6 and 9 after all
other electrical connections
have been made (see Panel

4). The jumper wire supplies
power to the circuit board.
Check floor level and inner roll
stop adjustments as detailed
in Panel 4 before operating

lift with electric pump.

Optional Interlock Kits

Universal Interlock Kit
30940K is available
for easy interface with
vehicle OEM electronic
signals.

Instrument Panel Display
Kit 30938K provides an
LED Panel Display that
interfaces with Braun
Universal Interlock Kit
30940K.

Note: Detailed installa­tion instructions are sup­plied with interlock kits.

LIFT S

(Yellow/Light Blue)

VEHICLE SECURE

SIG

(Gr

NAL

ey/Red)

SIGNAL

TOWED