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 TM 5-1940-277-20
TM 1940-20/2
6.
For MK1, using 7 mm box wrench, remove nut(s) (5) and connector(s) (6) from terminal(s) (7) of low
oil pressure switch (8). Using 17 mm open end wrench, remove low oil pressure switch (8).
7.
For MK2, remove boot (12) from low oil pressure switch (13) and disconnect wiring quick disconnect
connector (3) from terminal (4) of low oil pressure switch (13). Using 17 mm open end wrench remove
low oil pressure switch (13).
8.
Using adjustable wrench remove high water temperature warning switch (9) from exhaust manifold.
9.
Using 19-mm open end wrench remove water temperature sending unit (10) from exhaust manifold.
10.
Using 17-mm open end wrench remove oil pressure sending unit (11).
INSTALL:
NOTE
For proper seal and to prevent water or oil leak use pipe tape on
threads of sending units (10) and (11) and switches (8), (9),
and (13).
1.
Coat first four threads of sending units (10) and (11) and switcher, (8), (9), and (13).
2.
Install sending units and switches by hand to make sure threads are not damaged.
3.
Tighten sending units and switches with same wrench used for removal.
4.
Push wiring quick disconnect connector(s) (3) on same terminal(s) (4) as removed from old sending
units and switches. (Check tags for correct connection.)
5.
For MK1, place connector(s) (6) on terminal(s) (7) of oil pressure switch (8) and tighten nut(s) (5)
using 7-mm box wrench.
6.
For MK2, push wiring quick disconnect connector(s) (3) on terminal(s) (4) of low oil pressure
switch (13) and install boot (12).
7.
Fill fresh water system with coolant (if drained).
NOTE
Replace buoyancy flotation material if removed (refer to
8.
Close engine hatches.
3-221
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