PS Magazine - TB 43-PS-562
PS, The Preventative Maintenance Monthly
ISSUE 562
SEPTEMBER 1999
PS 562
2
SEP 99
PS 562
3
SEP 99
echanics, there’s nothing but trouble headed your way if you disconnect the
negative battery cables on your FMTV using the battery box diagram.
The diagram under the box lid fails to show the second ground connection
that must be removed.
Both ground terminals must be disconnected
before
you begin working on the electrical system or removing or replacing batteries.
Otherwise, you could be injured or killed from electrical shock or battery
explosion.
The correct method for disconnecting
and connecting the ground cables is
shown in Para 7-46 on Page 7-188 of
TM 9-2320-365-20-3 (2
1
/
2
-ton models)
and Para 7-57 on Page 7-288 of TM 9-
2320-366-20-3 (5-ton models).
Two leads are fastened to one battery
cable terminal lug, and the other is fas-
tened to a second lug. Get ’em all.
efore operation, drivers, make sure the CAB
function control knob on your FMTV’s hydraulic
control box is pushed in and turned all the way to
the right. If it’s turned completely, the knob will
stay pushed in.
That ensures that the cab air bags are inflated. If
you drive on deflated cab air bags, they get dam-
aged—and you get a hard ride.
The only times the air bags are deflated are for
air transport and maintenance.
And, the only time the cab tiedown
bracket (located near the air bags) is se-
cured to the frame is just before air trans-
port. Driving with the cab locked down or
with the air bags deflated will damage the
cab and the air bags.
More Support for Soft Cover
I
f rain or snow is causing water pud-
dling problems for your FMTV’s soft
top cover kit, add more support.
Support strap assembly, NSN 5340-
01-453-4678, goes between the top
cover and the bows to keep the cover
from sagging.
The assembly is made of webbing
that attaches to the roof support tub-
ing on both sides of the truck and to
the end bows.
Family of Medium Tactical Vehicles . . .
Drive with cab
tiedown unsecured
Normal operation: push in
and turn clockwise to inflate
Support straps stop puddling
Remove all ground wires
before working on batteries
man, this
truck rides
rough
!
it used to be
more
comfortable
.
it would
help if the
cab
air bags
were
inflated
.
only the
tm shows the
right way
to
disconnect my
batteries.
PS 562
2
SEP 99
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