TM 10-3930-659-20 14-8. TRANSMISSION BOTTOM GUARD REPLACEMENT (Con't). WARNING • Use  extreme  caution  when  handling  heavy  parts.    Lifting  device  Is  required  when  parts weigh over 50 lb (23 kg) for a single person lift, over 100 lb (45 kg) for a two person lift, and  over  150  lb  (68  kg)  for  a  three  or  more  person  lift.    Keep  clear  of  heavy  parts supported only by lifting device.  Failure to follow this warning may cause serious Injury or death to personnel. • Use  care  to  keep  transmission  bottom  guard  balanced  on  hydraulic  Jacks  at  all  times. Failure   to   follow   this   warning   may   cause   transmission   bottom   guard   to   slip   from hydraulic Jacks, resulting in serious Injury to personnel. 3. Lower transmission bottom guard (2) from frame (1) with hydraulic jacks and remove from under frame. 4. Remove transmission bottom guard (2) from hydraulic jacks. b. INSTALLATION WARNING Use  extreme  caution  when  handling  heavy  parts.    Lifting  device  Is  required  when  parts weigh over 50 lb (23 kg) for a single person lift, over 100 lb (45 kg) for a two person lift, and  over  150  lb  (68  kg)  for  a  three  or  more  person  lift.    Keep  clear  of  heavy  parts supported only by lifting device.  Failure to follow this warning may cause serious Injury or death to personnel. • Use  care  to  keep  transmission  bottom  guard  balanced  on  hydraulic  Jacks  at  all  times. Failure   to   follow   this   warning   may   cause   transmission   bottom   guard   to   slip   from hydraulic Jacks, resulting In serious Injury to personnel. 1. Position transmission bottom guard (2) on two hydraulic jacks. 2. Position transmission bottom guard (2) under frame (1) and raise into position with hydraulic jacks. 3. Install six washers (3) and screws (4) on transmission bottom guard (2) and frame (1). 4. Lower and remove two hydraulic jacks from under transmission bottom guard (2). 14-23