PS Magazine - TB 43-PS-581
PS, The Preventative Maintenance Monthly
ISSUE 581
APRIL 2001
The low coolant light tells you when
the coolant level falls below a safe level.
An aeration detector in the radiators
turns on the light.
Then you stop where it’s safe and shut
down. Let the engine cool off for 10
minutes or so before refilling the radia-
tors.
The light may have something to say
before operation, too. The light will
glow when the master switch is turned
on if the coolant level is low.
The light is the cheapest protection
you have against engine overheating. So
listen up when the light “talks.”
T
he cooling system on your M578
recovery vehicle is more likely to over-
heat than that on almost any other vehi-
cle. That’s why you should pay attention
to the low coolant level indicator light.
PS 581
APR 01
18
M578 Recovery Vehicle…
Take Care of Air Cleaner Box
Test the door for a good fit before you
mount it. If the door fits before mount-
ing, but not after, it may be a matter of
adjusting the hinge screws.
Loosening all nine screws will allow
you to shift the door approximately
1
∕
16
to
1
∕
8
inch to the left or right.
Next, rub chalk all over the seal’s sur-
face and close the door. when you reopen
If you still can’t get the door to fit,
resist the temptation to beat it into place
with a big hammer. Instead, order a new
access door, NSN 5342-01-270-3688.
This door has a new lock that gives a
better seal. It also costs about $60 less
than the old access door.
Regardless of which door you use,
you still need to make sure you’ve got a
good seal.
Do that with the chalk test.
Clean around the outside edge of the
air cleaner box and the door seal.
Eyeball the seal for any cuts or tears.
M
echanics, keep an eye peeled for air cleaner box doors that don’t close tight or
fit right. Leaks let in dirt and sand that can lead to engine failure on an M578 recov-
ery vehicle.
The biggest problem is with the old access door, NSN 5342-00-464-4548. It
has
a locking bar that doesn’t always keep the door sealed firmly against the vehicle.
Even when it does, the door doesn’t always match up with the opening in the hull.
the door, look for a solid chalk mark all
around the outside of the box.
Gaps in the chalk mean you probably
need a new seal, NSN 5330-00-745-
7781. Use adhesive, NSN 8040-00-152-
0063, to stick the seal in place.
Make
sure door
fits tight
Adjust hinge screws for proper fit
Check seal for cuts or tears
Rub chalk over seal surface
Watch for low
coolant light
LISTEN TO THE LIGHT
LISTEN TO THE LIGHT
581. 18-19 (C)
2/28/01
2:44 PM
Page 1
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