PS Magazine - TB 43-PS-572
PS, The Preventative Maintenance Monthly
ISSUE 572
JULY 2000
echanics, you’ll find that gunners who happily lower the seat all the way in
their ITV or FISTV aren’t nearly as happy when the stop screw breaks.
The screw snaps off because the
height adjustment slot is too short to
allow the seat to rest against the lip of
the support pipe. When the adjustment
handle is in the unlocked position, the
entire weight of the seat (and the gun-
ner) presses down on the stop screw.
You can prevent broken screws by
lengthening the height adjustment slot.
Here’s how:
1.
Remove the seat assembly from the sup-
port pipe.
2.
Measure
1
/
2
inch up from the top of the
height adjustment slot and drill a
25
/
64
-in hole.
3.
Cut out the area between the slot and hole
with a saber saw, NSN 5130-00-889-7745.
Appendix A of CTA 50-970 is your authority
for ordering the saw.
4.
Smooth the rough edges of the slot with a
metal file, NSN 5110-00-241-9152, from the
No. 2 Common shop set.
5.
Reinstall the seat assembly.
rewmen, after you’ve cleaned the
segment board on your Paladin, you’re supposed to remove the green pad from
the cleaning block. Just make
very
sure that you get the block locked back down
on the cleaning mechanism afterward.
If it’s not locked down properly, vibration makes the cleaning block pop up. In
that position, the cleaning block rubs against the segment board until—
zap!
—
the segment board shorts out. You’re left without turret power or commo.
Ensure the cleaning block is locked down by eyeballing it. Look for a slight
gap between the cleaning block and the cleaning mechanism. A gap means the
cleaning
block is
not locked
down.
Try again.
No
gap? The
cleaning
block is
locked
down and you’re good to go.
M901A1 ITV, M981 FISTV . . .
M109A6 Paladin . . .
hey!
what
happened to the
lights
!
the
commo's
out
,
too!
yeouch!!
my
achin' back
!
i can't take much
more
of this!
Loose cleaning block pops
up and rubs segment board
Slight gap here means cleaning
block is not locked down
PROBLEM: Seat rests on stop screw
SOLUTION: Drill hole
and extend slot
PS 572
20
JUL 00
they're
really
in the dark
when it comes
to
pm
!
PS 572
21
JUL 00
Back to Top Back to Top
