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 TM 3-1040-279-12&P
4-34 FOG OIL PUMP.
This task covers replacement of Gear Rotor Set.
INITIAL SETUP
General Safety Instructions
Tools
Fog oil is very slippery. Clean up all spills
General Mechanic's Automotive Tool Kit
immediately to prevent injury to personnel.
SC 5180-90-CL-N26
Equipment Condition
Fog oil pump removed from fog oil pump
assembly (P. 4-142).
REMOVAL
NOTE
Scribe mark on mechanical housing and inside wall of pump motor housing
before removal.
1.
Remove four screws (1) securing mechanical housing (2).
Carefully tap mechanical housing end of pump (3) on a block of wood and remove mechanical
2.
housing (2).
Remove gear rotor set (4) from pump (3).
3.
Remove woodruff key (5) from motor shaft (6), if being replaced.
4.
Inspect gear rotor set (4) for free movement, pitting, and corrosion. Clean/replace gear rotor set as
5.
required. Do not use file or abrasive cleaners.
Clean pump motor housing (7).
6.
7.
Inspect preformed packing (8) and replace as required.
INSTALLATION
Install woodruff key (5) in motor shaft (6), if removed.
1.
2.
Lightly oil gear rotor set and install gear rotor set (4) on motor shaft (6) using square slot on rotor.
NOTE
Aline scribe marks on mechanical housing and inside wall of pump motor
housing.
Install mechanical housing (2) and secure with four screws (1).
3.
Change 4
4-148
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