PS Magazine - TB 43-PS-675
PS, The Preventative Maintenance Monthly
ISSUE 675
FEBRUARY 2009
14
PS 675
15
PS 675
FEB 09
Dear Editor,
Recently, a SMART suggestion was approved that can save Uncle Sam
thousands of dollars. It prevents accidental and unnecessary air spring
deflation on your FMTV truck.
The cab knob on the FMTV’s hydraulic
manifold control panel inflates and deflates
the air springs in the cab. The only time
you need to deflate the air springs is
when you’re preparing for air transport.
If you forget to re-inflate
-and operate
your FMTV with deflated air springs
-you
could damage the air springs and other air
bag components.
Units can easily prevent down time and
costly repair work by installing an access
cover, NSN 5340-01-531-5710, over
the cab knob. It only takes a minute of
your time and a hex wrench to install it.
Before
installing the access cover,
make sure the cab knob is preset to the
inflate position by pressing and turning it
to the right.
And note that this tip applies only to older FMTV trucks that don’t
already have this cover installed.
Charles Meinke
FMTV Equipment Specialist
TACOM-Warren
Operational Light Check
Next, conduct an operational light check following these steps:
1.
Start your truck’s engine with the transmission in NEUTRAL.
2.
Allow the air tanks to build up normal operating pressure.
3.
Get someone to stand outside the truck, in a safe position, to observe the front
turn signals.
4.
Put the service lights in blackout mode.
5.
Press and hold the brake pedal.
6.
Release the brake pedal pressure while the observer you tagged in step three
watches the front turn signals. The turn signal lights
should not
illuminate
or flash.
You’ve Got a Spare
The K-10 relay you removed is also used in other circuits throughout the power
distribution modules. That means you can use them as spares.
And look for a future update to EM O195 (TM 9-2320-392-20). It’ll give you
updated NSN and PN information.
This info is also found in TACOM MAM 08-032. You can download it on the
AEPS website using this link:
Editor’s note:
Using this suggestion
can also save FMTV drivers and
passengers from backside injuries.
Good looking out, Mr. M.
5.
Remove the old K-10 relay, NSN 5945-01-527-6667 and PN G8V-1C7T-R-DC12,
and replace it with the new relay, NSN 5945-01-557-4666 and PN 12424852. This
relay location is referenced on the outside of the relay panel cover as K10/12V/
Stop/Hazard.
6.
Close the number 2 PDP relay module cover and reinstall the PDP cover.
7.
Place the external batteries switch to ON.
FMTV…
Access Cover Saves You in the End
Install access cover over cab knob
there’s a way
to prevent
that, y’know!
Replace old K-10 relay
Replacement K-10 relay will
have blue marking on top
ouch!
that
truck’s cab air
springs were
deflated!
675.14-15.indd
1-2
1/2/09
2:50:13 PM
C.M.
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