PS Magazine - TB 43-PS-562
PS, The Preventative Maintenance Monthly
ISSUE 562
SEPTEMBER 1999
M1-Series Tanks . . .
Exhaust Deflector Plans
A
n engine exhaust deflector is a must if you’re towing one tank with a second
one. The deflector connects to the exhaust grate of the towing tank and prevents
heat damage to the disabled tank’s vision blocks, hatch covers and other
front end components.
But you won’t find a deflector in the supply system. You have to make it.
The plans are in
Fig 7 of Appendix
D in the -20-1-5
TMs. If you have
problems mounting
the deflector on
your tank, grind
down the deflector’s
lower hook a bit to
help it fit.
PS 562
13
SEP 99
f you put the M1A1 tank’s firing
mechanism assembly back together
wrong, you’ll break the firing pin when
you fire the cannon or manually open
the breech.
Since broken pins must be replaced
before you can fire the cannon again,
make sure you assemble the firing
mechanism right the first time.
Here’s how:
M1A1 Tank . . .
4.
Use no oil when you assemble the
mechanism. That attacts dust and dirt
that gum up the assembly. Dry off all
parts before putting the firing assem-
bly back together.
the mechanism back together. If the
spring is installed after the firing pin,
the pin will break during firing or when
you manually open the breech.
pin moves out about
3
/
16
inch, the cam
is installed right. If the pin doesn’t
move, reassemble the mechanism.
2.
Measure the distance from the face
of the firing mechanism to the tip of
the firing pin. If the distance is
3
/
4
inch
or more, the spring is installed wrong.
Pin
Spring
Cam
1.
Check the assembled mechanism by
pushing down on the cam. If the firing
Less than
3
/
4
inch? Spring’s OK!
Install spring first, then pin
Protect towed vehicle from heat with
exhaust deflector on towing vehicle
fire!
fire!
fire!
uh-oh!
3.
Disassemble the mechanism and
make sure the spring is installed
be-
fore
the firing pin when you put
...firing pin should move out
3
/
16
inch
After pushing cam ridge.
..
PS 562
12
SEP 99
oh, no!
my firing pin
snapped!
HOW
EMBARRASSING!
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