TM 5-4520-253-13
DISASSEMBLE/ASSEMBLE/TEST BLOWER MOTOR
TEST EQUIPMENT:
Rubber hose, 1/4-inch ID, 36-inch length
Needle, inflating, football
Jar or glass, tall (at least 16-inch water capacity)
TOOLS: Tool kit, service, refrigeration unit
NSN 5180-00-596-1474
MATERIALS/PARTS: Dry cleaning solvent (Item 13, Appendix E)
REFERENCES:
Page 4-40 Remove/Install Combustion Blower and Housing
Page 4-51 Repair Blower Motor
EQUIPMENT CONDITION:
4-40
Condition Description
Combustion blower and housing removed.
DISASSEMBLY:
1. Remove one screw (1) at each of two brush assemblies (2).
2. Move brush assemblies (2) to one side and remove two field screws (3). Remove frame cap (4)
and pry out loading spring (5).
3. Remove nut (6) and flat washer (7). Pull out armature (8) and field (9). Do not remove ball
bearings (10 and 11) from armature shaft except to
NOTE
Do not disassemble items 12 thru
replace.
18 unless there is reason
to believe the fan assembly is defective.
4. Pry off skeleton housing (12). Separate spacer (13), fan assembly (14), spacer spool (15), upper
chamber (16), fan assembly (17), and lower chamber (18).
4-47
Page
