PS Magazine - TB 43-PS-678
PS, The Preventative Maintenance Monthly
ISSUE 678
MAY 2009
9
PS 678
MAY 09
O
perators, you’re not done with PM on your M198 howitzer until you make sure the
muzzle brake plug and breech cover are in place.
Without the
muzzle
brake
plug, NSN 1025-00-566-3789,
rainwater drains down the gun
tube to the breech. That rusts both
the gun tube and the breech.
The breech cover, NSN 1025-
01-038-6060, protects the outside
of the breech from water and
rust. If either the plug or cover
is damaged or missing, order a
new one.
•
Good shocks generate heat
during operation. Cautiously
feel the lower end of each
shock absorber for heat. The
shock should be warmer than
the hull area around it, but
not so hot that it could burn
you. If the shock absorber is
cool or too hot, report it.
•
Eyeball the hydraulic bump stops for damage or leaks and to make
sure they are properly mounted. Good bump stops keep the shock
absorbers from moving beyond their limits.
•
Take a close look at
the joint line in the
center of each shock
absorber. If you spot
any oil leakage, tell
your mechanic.
•
Check the shock absorbers
for lateral movement. Some
rotation on the bearing is
OK, but your mechanic needs
to know if there is any side-
to-side lateral movement
between the inner and outer
bearing assembly.
M109A6 Paladin…
S
h
a
k
e
U
p
Y
o
u
r
S
h
o
c
k
P
M
!
M198
Towed
Howitzer…
Protect Gun Tube
at Both Ends
it takes an
all-over,
after-
operations
check of
the shock
absorbers
to make
sure your
paladin
isn’t all
shook up,
crewmen.
here’s
how…
Feel lower end
of shock for heat
Look for oil leaks here
Check for
side-to-side
movement
I tried to
tell you…
my shock
absorbers
need some
pm!
that
takes
care of
your
pmcs!
wait!
what about
all this
rain
in my
gun tube?
Don’t forget to install
breech cover for protection
678.08-09.indd
1-2
3/30/09
2:22:07 PM
Click here for a copy of these articles to save or email.
Back to Top Back to Top
