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TM 55-2915-335-30&P
2-22. PUMP-END MOTOR BEARING - lNSPECT/REPLACE
2-22
This task covers: Replacement of pump cartridge impeller housing motor bearing.
INITIAL SETUP
Tools:
Aircraft Electrician’s Tool Kit, NSN 5180-00-323-4915
Bearing Installation Tool, Item 1, Appendix D
Pin Punch, Straight, 3/8 inch Dia.,
NSN 5120-00-273-0001
Reamer (Item 1, Appendix B, Sec. III)
Press, Arbor, Hand Operated, 1/2 Ton Pressure,
NSN 3444-00-243-2654, or equivalent
Drill Press, Bench Type, 1/2 inch capacity,
NSN 3413-00-529-0809, or equivalent
Plug Gage, Reversible, Cylindrical (Item 2,
Appendix B, Sec. III)
Material/Parts:
Dry Cleaning Solvent, NSN 6850-00-274-5421
Personnel Required:
66-Series Technical Inspector
68D Powertrain Repairer
Equipment Condition:
Brush holder assembly removed from impeller housing
PARA 2-20
Pump cover and inlet seal removed from impeller housing
PARA 2-21
1. INSPECTION
a.
b.
c.
Check pump-end bearing (1) in impeller housing (2) for cracks or chips. If bearing is cracked or chipped, re-
place bearing.
With 6 inch (152,4 mm) scale measure width A of bearing thrust face. If thrust face is more than 1/16 inch
(1,60 mm), replace bearing.
Using plug gage (Item 2, Appendix B, Section III) check bearing bore diameter B. If 0.3145 NO GO gage
passes through bearing, replace bearing.
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