TM 10-3930-671-24 3.3. Machine Jacking and Blocking Raising Drive Wheels Off Floor  ........................................ F-59 Blocking The Upright In Raised Position .......................... F-59 Raising Rear Of Truck ...................................................... F-60 Raising Entire Truck  ......................................................... F-60 Raising Truck With A Hoist   .............................................. F-61 Lifting And Jacking Points  ................................................ F-62 Shipping Tiedown Instructions  ......................................... F-62 All tools and lifting equipment must be in good condition, meet  the  load  capacity  requirements,  and  have  OSHA labels    when    required.    Tools    with    defects    can    have failures causing severe injury or death. NOTE To perform these service procedures, it is recommended that you first: • Park   truck   on   a   hard,   level,   and   solid surface,  such  as  a  concrete  floor  with  no gaps or breaks. • Put  upright  in  vertical  position  and   fully lower the forks or attachment. • Put all controls in neutral. Turn key switch OFF. • Apply the parking brake. Raising Drive Wheels Off Floor This procedure uses the upright as a lever to lift the drive wheels    off    the    floor    and    prevent    accidents    due    to inadvertent powering of the drive wheels. 1.    Park truck safely. 2.    Be sure upright trunnion bolts are tight. 3.    Start the engine. Tilt the upright fully back. Adjust upright   height   as   necessary   to   put   blocking underneath. 4.    Put  a  solid  4x4  inch  hardwood  block  under  the front section of each upright rail. Put a .125-.250 inch thickness steel plate on top of each block. 5.    Tilt  upright  fully  forward.  This  action  should raise the drive wheels off the floor. Release the tilt control lever and turn engine OFF. 6.    Check  for safe clearance between drive  wheels and floor and blocks. 7.    Check  for  stable  condition  of  the  truck.  Be sure  that  the  blocks  are  located  securely  under the  upright  rails  before  operating  the  drive  or working on truck. 8.    Lower the drive wheels to the  floor and remove the blocks by reversing the above procedure. Blocking The Upright In Raised Position This  procedure  is  used  to  safely  provide  clearance  for access from the front of truck to components on or near the drive axle. 1.    Park truck safely. 2.    Put blocks in front of and behind drive wheels. F-59