TM 10-3930-659-34 4-69. FORK/BOOM ASSEMBLY MAINTENANCE (Con’t). d. 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. NOTE Fork/boom assembly weighs 1020 lb (463 kg). 1. Attach suitable lifting device to fork/boom assembly (3) and position fork/boom assembly on loader frame (1). 2. Install two pins (2) on fork/boom assembly (3) and loader frame (1) with two washers (5) and screws (6). TA70843 4-286