PS Magazine - TB 43-PS-669
PS, The Preventative Maintenance Monthly
ISSUE 669
AUGUST 2008
41
PS 669
AUG 08
I
s the 24-volt fuel gauge, water temperature gauge, or oil pressure gauge on your
tactical quiet generator maxing out or burning out?
If one or all of them are, the problem may be
with the torque put on the retaining nuts on the
mounting bracket.
The gauges are made by Beede Electrical and are installed into the control panel
of your generator by DRS Fremont. The fuel gauge is part number 945331 and NSN
6625-01-366-0193. The water temperature gauge is part number 945329 and NSN
6685-01-364-6549. The oil pressure gauge is part number 945330 and NSN 6620-
01-368-1531.
The retaining nuts are to be torqued to a setting of 6 in-lbs. This is not much more
than ±nger-tight! When the nuts are over-torqued, the bushings are crushed and the
gauge grounds against the mounting bracket. This ground will either max out the
gauge or destroy it!
So, if you’re having this problem, loosen the nuts on the mounting bracket.
Sometimes, if the gauge is still functional, it will work right. If you install a new
gauge and mounting bracket, make sure to torque it to 6 in-lbs.
Beede is helping you out, too.
The new mounting bracket for
these gauges has a denser, thicker
insulator that will help prevent
the bushings from being crushed.
The old insulator is black and the
new one is white.
So, generator mechanics, why
not check these gauges right now?
If the insulator is white, you’re
in good shape. If the insulator
is black, check the condition of
the bushings. If they’re being
crushed, back off the nuts on the
mounting bracket, then torque
them to 6 in-lbs.
Chances are good that by now, the gauges with the black insulation are out of the
supply system and when you order a new gauge, you’ll get the white insulator. But
if your new gauge still has the black insulator, the correct torque is the key to a good
gauge.
Let’s Talk
Gauges
Are gauges hitting max?
How tight are
retaining nuts?
Bushings should look like this…
…and
not
like this
New bracket has thicker insulator
why are
you
on
strike?
I’m not
working until
I’m mounted
right!
New
Old
Tactical Quiet
Generators…
669.40-41.indd
1-2
6/29/08
4:31:39 PM
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