PS Magazine - TB 43-PS-682
PS, The Preventative Maintenance Monthly
ISSUE 682
SEPTEMBER 2009
14
PS 682
15
PS 682
SEP 09
Overcharging
Overcharging is the culprit when the needle hangs in the red section on the right
side of the gauge.
Once the kit is installed, you can work on the sending unit or replace a leaking
access cover gasket with the fuel tank in place.
The
kit
comes
with
the
instructions, hardware and plate
you’ll need to install the access
cover in the truck’s cargo floor.
Then you’ll be good to go the next
time you have to drop the tank.
Just make the hole and install the
cover while the tank’s off.
By the way, you can’t use this
kit on M996 or M997 ambulances
or Avengers
because
of
their
design.
Undercharging
Undercharging is the problem
when the needle settles well
below that 28.5-volt mark, even
though it’s still in the green.
Tester Option
Besides using the BAT-GEN indicator to
determine your battery’s health, consider
using battery testers. These small devices
test your vehicle’s lead-acid batteries to
ensure they’re good.
If
your
BAT-GEN
gauge
indicates any of these problems,
get your mechanic to check out
the charging system.
If the gauge shows a high rate of charge after the engine’s been running for 30
minutes, there’s a good chance the batteries are being cooked to death. Get your
mechanic to check out the charging system.
This is
OVERCHARGING
Red: 30-34 volts
This is
UNDERCHARGING
Green: 26-30 volts
HMMWV…
Fuel Tank ACCess Made
Easy
over-
charging!
that
burns
me up!
undercharging?
no wonder I feel
drained!
Battery testers
are simple to use
some options include
nsn 6625-01-433-
6
7
86 and nsn 6130-
01-463-8499.
check fed log
for more available
testers.
they come with
instructions on
how to use them.
I spent half my morning
fixing that gasket. there’s
got to be an
easier
way
to get to the tank!!
Why doesn’t
anyone tell that
guy about the
floor access kit?
Remove
floor
access
cover…
…to reach
fuel tank
underneath
mechanics, waNt to
work on a hmmwv
fuel tank without
dropping it?
then order the cargo
floor access hole
and cover kit, nsn
2510-01-454-
7
0
77
.
yo,
absolutely!
682.14-15.indd
1-2
7/21/09
6:12:26 PM
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