PS Magazine - TB 43-PS-581
PS, The Preventative Maintenance Monthly
ISSUE 581
APRIL 2001
PS 581
APR 01
23
M119A1 Towed Howitzer…
L
ubing your howitzer’s three saddle bearing surfaces is wasted effort if you don’t
clean them properly first, operators.
It’s easy to remember to clean the top sides of the surfaces. They’re in plain sight.
It’s the undersides of the saddle that are usually forgotten.
Dirt, sand and oil collect there, too.
If you don’t clean them off, this combination
acts like sandpaper. Soon, those smooth metal surfaces are scratched, pitted and
covered with corrosion. Your howitzer is NMC.
Use a clean cloth to wipe
all
of the surfaces. You’ll have to get down on your
hands and knees to make sure the underside is clean.
M109-Series SP Howitzers, M992A2 Ammo Carriers…
Order the Right Starter
C
hances are, mechanics, that the starters on your unit’s M109-series howitzers
and M992A2 ammo carriers were ordered with NSN 2920-00-304-3493.
But that one NSN could bring either a Leece Neville or a Prestolite starter. As
you may have already discovered, the Prestolite starter is used mostly on tacti-
cal vehicles and won’t fit M109s and M992A2s. For that reason, the generic
NSN has been deleted and separate NSNs assigned to each starter.
The Prestolite starter now comes with NSN 2920-01-075-2813. The Leece
Neville starter is NSN 2920-01-069-6997.
When it’s time for a new starter for your howitzer or ammo carrier, order the
Leece Neville for the M109 and M992A2. Then, don’t use the generic NSN to
turn in the old starter. Instead, use the NSN for whichever brand of starter you’re
turning in.
Water enters here
Wipe gunk
off saddle
bearing
surfaces
A couple of
1
∕
4
-in
drain holes puts a
stop to the rust
problem.
Drill two holes as
close to the bot-
tom of the bracket
as possible to let
water run out. No
water, no rust.
M992A2 Ammo Carriers…
Drill holes
here…
…and
here
CATCH IT ON THE
SIDE
T
he steel canister support brackets in your M992A2 ammo carrier may look strong,
crewmen. But add a little water and they get weak fast.
Moisture from condensa-
tion and washing collects in the bottom of the support brackets. You know what mois-
ture does to steel—rust. Eventually, rust weakens the support brackets enough that
they have to be replaced.
581. 22-23 (C)
3/3/01
1:03 PM
Page 1
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