TM 9-2350-222-20-2-3-2
36-35. CUPOLA HATCH TEST (CONT)
Normal
Probable
Procedure
Step
Indication
Fault
Open cupola hatch (1) to
1.
3 11/16" to 7 3/16"
a.
Too many spring
counterbalance position
from forward lower
surface of cupola hatch
(TM-10).
Not enough spring
b.
to cupola seal lip
c.
Spring leaves too
2.
Using spring scale hooked to
55 pounds maximum
a.
Not enough spring
cupola hatch (1) near hold-
close handle (2), pull open
cupola hatch until dog (3) of
Spring leaves too
b.
hold-open handle (4) clicks
into place.
...
...
Tape spring scale near end
3.
of hold-open handle (4).
a.
Hold-open latch
Using spring scale, pull down
40 pounds maximum
4.
dog needs cleaning
on hold-open handle (4) and
to either unlock hold-
and greasing
pull cupola hatch (1) to
open latch or pull
counterbalance position.
cupola hatch down to
Too many spring
b.
counterbalance
a.
5.
Using spring scale on end of
Too many spring
35 pounds maximum
hold-close handle (2), pull
cupola hatch (1) from
b.
counterbalance to closed
Not enough spring
position.
6.
Close and lock cupola hatch
...
...
(1) (TM-10).
7.
a.
Pour water over cupola hatch
Bad cupola hatch
No leakage inside cupola
(1).
around cupola hatch
END OF TASK
Para 36-35 Cont
36-78