TM  9-2815-202-34 4-10.  AIR   BOX   HEATER c. Cleaning/inspection REPLACEMENT   (Cont) WARNING l l (1) (2) (3) (4) Dry  cleaning  solvent  P-D-680  Is  toxic  and  flammable.  Wear  protective goggles  and  gloves  and  use  only  in  well-ventilated  areas.  Avoid contact  with  skin,  eyes,  and  clothes.  Don’t  breathe  vapors.  Do  not  use near  open  flames  or  excessive  heat.  The  flash  point  is  100^oF-138°F (38°C-50^oC).  If  you  become  dizzy  while  using  cleaning  solvent,  get medical aid. If contact with eyes is made, wash your eyes with water and  get  medical  aid  immediately. Compressed  air  used  for  cleaning  purposes  will  not  exceed  30  PSI. Use  only  with  effective  chip  guarding  and  personal  protective equipment  (goggles/shield,  gloves  etc.). Clean  outside  surface  of  pump  with  cleaning  solvent  and  dry  with  compressed  air. Inspect  electrical  terminals  for  damage  or  corrosion.  Remove  corrosion  with  a  wire  brush. Inspect pump rotor and body for excessive wear, corrosion, or other damage. Inspect air hose for cuts, tears, kinks, or damage. d. Assembly (1) Install three vanes (26) in eccentric hub (27). (2)  Install  three  screws  (24)  and  cover  (25)  on  air  pump  (5).  Tighten  screws  securely. (3) If removed, install elbows (4 and 23) to air pump (5). e.  Test/Adjustment CAUTION Do not exceed 18 V dc on air pump. Excessive  voltage  will  overspeed  air pump  and  damage  pump  vanes. NOTE Use fabricated test lead to reduce a 24 V dc power source to 18 V dc and  connected  in  series  with positive  terminal  of  power  source. (1) Connect an 18 V dc power source to air pump (5). Connect positive lead to terminal  (13)  marked  (+)  and  negative lead  to  unmarked  terminal  (14). 4-24