Braun 403 Secure Lift, Lift Housing Jam Nuts Flat Washer Lift Clamp, All-Thread Mounting Stud

Braun Corporation FMVSS No. 403 Quick Reference Installation Sheet 34274 Rev. A

2 Secure Lift

1.Attach Mounting Brackets to Vehicle Framing Members

Position lift mounting brackets as detailed in Step 1 (see Figures C, D and F). Oval slotted mounting holes are provided in the mounting brackets to allow adjustment. Carefully drill 21/64" (.328") diameter mounting holes at the center of the oval mount- ing slots (holes may be present).

Twenty 5-16-18 x 1" hex bolts are supplied for bolting the lift mounting brackets to the vehicle framing mem- ber (four per inboard bracket and six per outboard bracket).

Place a flat washer onto each mount- ing bolt. Insert bolts through mount- ing bracket, vehicle floor and fram-

5/16-18 x 1"

Hex Bolt

Flat

Washer (typical)

Inboard

Mounting

Bracket

Figure D

All-Thread

Stud

Vehicle

Framing

Members

2. 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. See Figures G and H.

Carefully position lift in vehicle (aligned with mounting brackets). Position (slide) the six lift mounting clamps along the sides of the lift housing until aligned with mounting bracket all-thread studs. See Figure F. Lower lift onto mounting bracket studs

Jam Nuts

Lift Clamp

Flat Washer

Jam Nuts

ing member as shown in Figure D. Installation is typical for all brackets (outboard brackets require 6 mount- ing bolts each).

All fasteners must meet FMVSS 571.403 Section 6.3.

Lock Washer
(typical)	All-Thread
	Stud
Nylock Hex Nut
(typical)

Figure F

3. Height Adjustment

The lift outer barrier must be aligned with the vehicle access hole.

The lift housing must be aligned with vehicle chassis (level). 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 G.

Figure E

C

B

Lift Housing

Jam Nuts

Flat Washer

Lift Clamp

Flat Washer

Jam Nuts

4. Horizontial Adjustment

Shift lift and mounting brackets left-to-right as needed (lift must be centered in door opening). Tighten the 5/16" bolts securing mounting brackets (shown in Figure D) to the frame.

Torque Specifications: 20 foot pounds.

Tighten upper set of 3/4" hex jam nuts (with flat washer) down to the lift mounting clamps. Tighten jam nuts.

Place one large diameter flat washer onto each mounting bracket all- thread stud. Thread two 3/4" hex jam nuts fully onto each all-thread stud (against lift mounting clamp).

In-Out Positioning

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

Dimensions A, B, C and D must be equal (within 1/16").

Figure G

5-3/8"

2-1/2"

A

All-Thread

Mounting

Stud

D

Figure H

Mounting

Bracket

Torque Speci￿cations: 100 to 120 foot pounds.

10¼”

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 Ship- ping Block Removal Instruction 28942.