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 TM 5-1940-277-20
TM 1940-20/2
1.
Remove aft cockpit (refer to paragraph 3-27).
2.
Open and secure engine compartment hatches (refer to paragraph 3-25).
Drain primary and secondary cooling systems (MK2) (refer to paragraph 3-69).
3.
4.
Remove keel cooler inlet/outlet hoses (refer to paragraph 3-68).
Using 2 1/2 inch open end wrench, remove two pipe nuts (1) and washers (2), from inlet and outlet pipes (3).
5.
6.
Using 5/16 inch combination wrench, remove two nuts (4) and washers (5), securing rear keel cooler front support
studs (6).
7.
With assistance of second person, lower keel cooler (7) out of keel cooler box.
CAUTION
Do not damage gasket mating surface when removing silicone sealant.
8.
Using putty knife, remove two rubber gaskets (8) and (9) and silicone sealant.
9.
Using wire brush, clean debris from cooler mounting hardware.
lNSTALL:
1.
Install rubber gasket (8) over cooler front support studs (6).
2.
Install rubber gasket (9) over inlet and outlet pipes (3).
3.
Apply silicone sealant, Item 3, App. C, to surface of rubber gaskets (8) and (9).
4.
With assistance of second person, place keel cooler (7) in keel cooler box.
5.
Install two washers (5), and nuts (4) securing rear keel cooler front support studs (6) and hand tighten.
Install two washers (2), and pipe nuts (1) on inlet and outlet pipes (3) and hand tighten.
6.
7.
Using 15/16 inch combination wrench, tighten two nuts (4).
8.
Using 2 1/2 inch open end wrench, tighten two pipe nuts (1).
9.
Replace keel cooler inlet/outlet hoses (refer to paragraph 3-68).
10.
Replace coolant and check for leaks (refer to paragraph 3-69).
3-167
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