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TM 55-1905-223-24-18-2
4-20. Repair Motorized Oil Pump Assembly. (Figure 4-10)
This task covers:
a. Disassembly,
b. Repair,
c. Assembly.
Equipment Condition
Tool kit, general mechanic's,
Oil pump/motor assembly removed
as specified in paragraph 3-31 .
Stator P/N 4330-1545-002
Stator ring P/N 4320-2361-000
Rotor P/N 4320-4559-002
Universal joint P/N 4320-1612-000
Mechanical seal P/N 4320-2424-000
Motorized pump P/N 33260
Pump drive motor P/N 4330-04528-000
Lubrication oil, Item 20, Appendix C
a. Position motorized pump (15) on a clean flat surface.
b. Remove eight machine screws (8) securing housing (7) to pump body.
c. Separate and remove housing from pump body.
d. Slide stator ring (6) and stator (9) off of rotor (5).
e. Separate rotor (5) from universal joint (3) by using a punch to remove pin (4). Support rotor when
removing pin. Retain pin (4) for assembly.
f. Separate universal joint (3) from motor shaft by using a punch through outlet port on pump body to
remove pin (2). Retain pin (2) for assembly.
g. Slide universal joint off of motor shaft and out of pump body.
If any part of mechanical seal is broken or damaged, the complete seal assembly
must be replaced.


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