20-55. BLOWER DRIVE ASSEMBLY REPAIR (CONT).
Remove nut (7), lockwasher (6), thrust
washer bearing (8), thrust bearing (9), drive
gear (10) and thrust bearing (11) from
blower drive assembly (3). Discard
Remove and discard pin (12) from blower
drive assembly (3).
Remove blower drive assembly (3) from vise.
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.
Clean all metal parts with drycleaning solvent.
Dry parts, except bearings, with compressed air. Let bearings air dry.
Inspect oil passages to ensure all passages are free of debris.
Inspect all threads for stripped or crossed condition. Replace damaged parts.
If thrust washer is not within specification, replace thrust washer.
Using a micrometer, check to ensure that thrust washer thickness is between 0.2350 and 0.2450 in. (5.97
and 6.223 mm).
If thrust bearings are not within specification or show signs of scoring, replace thrust bearing.
Using a micrometer, check to ensure that thrust bearing thickness is between 0.0590 and 0.0610 in.
(1.499 and 1.549 mm). Inspect thrust bearings for scoring.