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 TM 5-1940-277-20
TM 1940-20/2
CAUTION
Do not leave boat with water system drained, unless
a note is attached to start switch.
REMOVE:
1.
Turn master switch to "OFF."
2.
Open and secure engine hatches (refer to paragraph 3-154).
NOTE
If starboard engine sending units are to be replaced remove
buoyancy flotation material (refer to paragraph 3-152).
Engine coolant must be drained from exhaust manifold to
remove either water sending unit. It is not necessary to drain
oil to replace the oil sending units.
NOTE
Tag all electrical leads during removal to assist with installation.
3.
Using 1/4 inch wrench remove two nuts (6) form the oil sending unit (5).
4.
Remove two wires (4) from oil sending unit (5).
5.
Using 5/8 inch wrench remove oil sending unit (5) from engine (3).
6.
Drain cooling system (refer to paragraph 3-69.1).
7.
Disconnect wires (1) from water sending unit (2).
8.
Using 3/4 inch socket and ratchet remove the water sending unit (2) from engine (3).
INSTALL:
NOTE
For proper seal and to prevent water or oil leak use pipe tape on
threads of sending units. Coat only first four threads. One wrap
is enough.
1.
Using 5/8 inch wrench install oil sending unit (5) to engine (3).
2.
Install two wires (4) to oil sending unit (5).
3.
Using 1/4 inch wrench secure two wires (4) to oil sending unit (5) with two nuts (6).
4.
Using 3/4 inch socket and ratchet install water sending unit (2) to engine (3).
5.
Install two wires (1) to water sending unit (2).
6.
Fill engine cooling system (refer to paragraph 3-69.1).
7.
Close engine hatches.
3-222.1
Change 2
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