21-2. BLOWER ASSEMBLY REPAIR (CONT).
Drycleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles, face
shield, 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 II Drycleaning Solvent is 140 degrees F (60 degrees
C) and Type III Drycleaning Solvent is 200 degrees F (93 degrees 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.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with
effective chip guarding and personal protective equipment (goggles/shield, gloves, etc).
Failure to comply may result in injury or death to personnel.
Do not use compressed air on bearings. Allow bearings to air dry. Compressed air may
cause damage to bearings.
Clean metal parts in drycleaning solvent. Dry parts, except bearings, with compressed air. Allow
bearings to air dry.
Inspect roller and ball bearings for corrosion, scoring, pitting, or other damage.
Inspect both timing gears at teeth and at bore splines for chips or nicks. If replacement is necessary, both
gears must be replaced.
Inspect oil holes. If clogged, clean with drycleaning solvent.
Inspect all finished surfaces for burrs and scoring. Use crocus cloth to clean.
Inspect blower rotors for burrs or scoring. If rotors are slightly scored or burred, they may be cleaned
with emery cloth.
Inspect rotor shaft splines for burrs or peening.
Inspect inner bearing races for burrs or scoring.
Inspect inside surface of blower housing for burrs or scoring. If burred or scored, clean with emery cloth.
Check machined ends of blower housing and end plates for flatness and burrs. If end plates are slightly
scored or burred, clean with emery cloth.
Clean out oil gallerys with drycleaning solvent. Dry with compressed air.