TM 10-3930-669-34 9-2. PLANETARY HUB REPLACEMENT/REPAIR (CONT). WARNING Use care when removing or installing snap  and  retaining  rings.    Snap  and retaining rings are under spring tension   and   can   act   as   projectiles when released and could cause severe eye injury. (4) Remove  retaining  ring  (28)  and  backplate  (29) from planetary ring gear (30). NOTE If  wheel  studs  are  damaged,  perform Step  (5).    (5)  Use  a  press  to  remove damaged   stud   (31)   from   wheel   hub (4). c. Cleaning/lnspection. WARNING • Dry-cleaning solvent (P-D-680) is TOXIC and flammable.  Wear protective goggles and gloves; use  only  in  a  well-ventilated  area;  avoid  contact  with  skin,  eyes,  and  clothes;  and  do  not breathe  vapors.    Keep  away  from  heat  or  flame.    Never  smoke  when  using  solvent;  the flashpoint for type I dry-cleaning solvent is 100'F (38° C) and for type II is 138'F (50° C).  Failure to do so may result in injury or death to personnel. • If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical help.    If  solvent  contacts  skin  or  clothes,  flush  with  cold  water.    If  solvent  contacts  eyes, immediately flush eyes with water and get immediate medical attention. (1) Clean all metal parts with dry-cleaning solvent. (2) Inspect all parts for wear, cracks, nicks, burrs, or scratches. (3) Replace all damaged parts. 9-6