PS Magazine - TB 43-PS-560

PS, The Preventative Maintenance Monthly

ISSUE 560

JULY 1999
PS Magazine - TB 43-PS-560 - Page 8 of 34
PS 560
15
JUL 99
PS 560
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JUL 99
rewmen, remember to drain your MLRS after every washing to prevent
water buildup in the hull.
If you forget to drain, the water level will rise until it shorts out the diodes on
the 1W30 cable, NSN 2590-01-104-9148, and the 1W31 cable, NSN 2590-01-
104-9146. Since those cables control the fuel pumps, your vehicle won’t be
going very far.
Once the hull’s completely drained, be sure to close and tighten the drain
plugs, NSN 4730-00-010-3867, before you drive the vehicle. If they’re not
closed tight, the plugs can work loose and fall out.
Clean the plugs before you install
’em, too. Wipe off any mud or sand
that might keep the threads from mesh-
ing properly.
Before you screw in the plugs, lightly
coat the threads with caulking com-
pound, NSN 8030-00-297-0600. That’ll
hold down corrosion and keep the plugs from sticking in place.
MLRS . . .
echanics, when it’s time to drain the antifreeze from the M113A2 carrier’s
thermostat housing, you’ve got a real mess on your hand
s...
and on the
engin
e...
and on the ground.
There’s just not enough room to slip a pan under the housing’s straight pet-
cock. So when it’s opened, antifreeze
runs all over the place.
You can prevent that mess by re-
placing the straight petcock with a 90
o
petcock, NSN 4820-00-293-3669, and
hose adapter, NSN 4730-00-555-1152.
Then, when you’re ready to drain
the housing, attach a 5-ft to 6-ft piece
of rubber tubing, NSN 4720-00-847-
1710, to the adapter and open the drain
valve. The antifreeze flows through
the hose and stays off the engine.
Just make sure you drain the anti-
freeze into a suitable container and dis-
pose of it properly.
M113A2 FOV . . .
Drain plugs in place and tight?
there,
don't you feel
better
?
not until
you drain the
extra water
out
of my
hull
!
yuck!
there's got
to be a
better
way
to
drain
the
thermostat
housing
!
Replace
straight
petcock.
..
...with 90
°
petcock
and
adapter
PS 560
15
JUL 99
PS 560
14
JUL 99
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