TM 10-3930-669-34 13-4.  FRAME COUNTERWEIGHT REPLACEMENT (CONT). b. Cleaning/Inspection. 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 parts with dry-cleaning solvent and wipe dry with wiping rag. (2) Inspect thread inserts in lead weights for cracks or bulging. (3) Replace all damaged parts. c. Installation. WARNING Front steel counterweight weighs 170 lbs (77 kg) and rear steel counterweight weighs 110 lbs (50 kg). Attach  suitable  lifting  device  prior  to installation to prevent possible injury to personnel. (1) Using lifting device, install rear steel counterweight  (9)  in  forklift  (5)  with  two  screws (16),  four  washers  (5),  and  two  lock  nuts  (14). Tighten lock nuts to 41 lb-ft (55 N.m). (2) Using lifting device, install front steel counterweight (13) in forklift (5) with two screws (16),  four  washers  (15)  and  two  lock  nuts  (14). Tighten lock nuts to 41 lb-ft (55 N.m). 13-36