Document ID: chunk:federal_register_of_legislation:F2006L02312:body:0:p18
Version: federal_register_of_legislation:F2006L02312
Segment Type: other
Provision Reference: 
Character Range: 45131–47691

a point just above the thigh bar housing (see Figure 2 of appendix 1 to this annex).  Then carefully return the back pan to the seat–back.  Care must be exercised throughout the remainder of the procedure to prevent the 3 DH machine from sliding forward;

4.11. Install the right and left buttock weights and then,  alternately, the eight torso weights.  Maintain the 3 DH machine level;

4.12. Tilt the back pan forward to release the tension on the seat-back. Rock the 3 DH machine from side to side through 10o arc (5O to each side of the vertical centreplane) for three complete cycles to release any accumulated friction between the 3 DH machine and the seat;

 During the rocking action, the T-bar of the 3 DH machine may tend to diverge from the specified horizontal and vertical alignment.  The T-bar must therefore be restrained by applying an appropriate lateral load during the rocking motions.  Care shall be exercised in holding the T-bar and rocking the 3 DH machine to ensure that no inadvertent exterior loads are applied in a vertical or fore and aft direction;

 The feet of the 3 DH machine are not to be restrained or held during this step.  If the feet change position, they should be allowed to remain in that attitude for the moment.

 Carefully return the back pan to the seat-back and check the two spirit levels for zero position.  If any movement of the feet has occurred during the rocking operation of the 3 DH machine, they must be repositioned as follows:

 Alternatively, lift each foot off the floor the minimum necessary amount until no additional foot movement is obtained.  During this lifting, the feet are to be free to rotate; and no forward or lateral loads are to be applied.  When each foot is placed back in the down position, the heel is to be in contact with the structure designed for this;

 Check the lateral spirit level for zero position; if necessary, apply a lateral load to the top of the back pan sufficient to level the 3 DH machine's seat pan on the seat;

4.13. Holding the T-bar to prevent the 3 DH machine from  sliding forward on the seat cushion, proceed as follows:

 (a) return the back pan to the seat-back;

 (b) alternately apply and release a horizontal rearward load, not to exceed 25 N, to the back angle bar at a height approximately at the centre of the torso weights until the hip angle quadrant indicates that a stable position has been reached after load release.  Care shall be exercised to ensure that no exterior downward or lateral loads are applied to the 3 DH machine.  If another