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 TM 55-1905-223-24-18-1
REPAIR
Repair at this level of maintenance is by replacement of: delrin bushings (15),
helical compression springs (4) and (9), preformed packing (11), bronze bushings
(25), gasket (28), and detective structural parts of the hatch.
ASSEMBLY
Install cover (10) and coaming (27) on hatch (1).
a.
b.
Measure the required length around the hatch for gasket.
c.
Add one additional inch and cut gasket.
NOTE
If the gasket is shorter it will eventually
shrink, leaving a gap at the joint and
destroying the watertight integrity of the
hatch.
Install gasket (28) and gasket retainer (8) on hatch.
d.
I n s t a l l cover strap (21).
e.
Install pipe sleeve (2) and shim (20) on hatch.
f.
Install coupling (26) and helical compression spring (9) on hatch.
g.
h.
Place bronze bushings (25) in position, then install dog arms (24) with
guides (23) on hatch.
Tighten set screws (22).
i.
Install cylindrical pins (17) in dog arms (24).
Secure cylindrical pins using cotter pins (16).
k.
Install cover (18) on hatch.
l.
Place preformed packing (11) and delrin bushings (15) on handwheel and shaft
m.
(19).
Install handwheel and shaft (19) on hatch.
n.
Install handwheel (14) and secure using hexagon nuts (13).
o.
Install pipe sleeve (5) on hinge blade.
p.
Install toggle (7) and sprocket (6) on hinge blade.
q.
Install stop (3) on hatch (1), then install helical compression spring (4) on
r.
hinge blade.
2-707
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