PS Magazine - TB 43-PS-667
PS, The Preventative Maintenance Monthly
ISSUE 667
JUNE 2008
4
PS 667
JUNE 08
5
PS 667
JUNE 08
M1A1 Tank NBC Housing
The M1A1 tank’s NBC prioritization regulating valve assembly housing, listed as
Item 13 in Fig 359 of TM 9-2350-264-24P-1, is now available for requisition by ±eld
units with NSN 2590-01-519-7682. Make a note until the SMR code is changed in the
TM from XBOZZ to PAOZZ.
T
hat old enemy, vibration, is rearing its ugly head again, mechanics. This time it’s
affecting the honeycomb channel restraint bar screws in the M992A2 ammo carrier.
During operation, the screws, NSN 5305-01-549-7766, are vibrating loose and
backing out. If they fall out, the restraint bar comes loose and ammo can go flying.
A little adhesive, NSN 8030-01-559-4889, will keep those screws nice and tight.
Apply it like this:
1.
Remove and throw out the old screw from the channel restraint bar and honeycomb
assembly.
2.
Clean the threaded hole to remove any dirt or oil.
3.
Put several drops of adhesive
into the honeycomb’s threaded
hole and onto the threads of a
new screw. The screw threads
should be fully coated with
the adhesive.
4.
Install the new screw through
the channel restraint bar into
the honeycomb assembly and
tighten Frmly. Wipe away any
excess adhesive with a clean
cotton rag like NSN 7920-00-
205-1711.
5.
Apply lubricating oil, NSN 9150-01-518-9484, to the channel restraint bar and the
head of the new screw. That allows the restraint bar to rotate under the screw.
6.
Repeat steps 1-5 for the 11 remaining screws on the 2x8 and 4x6 honeycomb
assemblies.
The adhesive will cure to full strength in about 24 hours.
E
xercising the recoil of your tank’s main gun is a semi-annual requirement,
crewmen. But before it’s done, you need to know about a change to TB 9-1000-234-
13,
Exercising of Recoil Mechanisms and Equilibrators.
Currently, Table 2-2 says you can use a hydraulic jack or a wrecker with an
improvised exercising bracket to exercise the recoil. That’s no longer true.
Now the only authorized methods are the M3 oil pump, the gun mount exerciser,
or by Fring the gun. Make a note until the references to Para 2-2d and 2-2e can be
removed from Table 2-2 for M1-series tanks. The change is authorized on Page 5-58
of TB 43-0001-62-06-4 (Apr 07),
Equipment Improvement Report and Maintenance
Digest for Tank, Automotive, and Armament Equipment.
And don’t forget to update your electronic DA ±orm 2408-4 after exercising the
recoil. Go to:
M1-Series Tanks…
Use the Right Exercise Equipment
M992A2
Ammo
Carrier…
A Sweet Solution to
Loose HoneyComb SCrews
it’s
time to
exercise
your
recoil!
not unless you
use the right
kind of exercise
equipment!
Coat screw threads with
adhesive, then install
hey, ps has a
solution to your
loose honeycomb
channel restraint
bar screws!
sweet!!
667.04-05.indd
1-2
5/5/08
6:12:08 PM
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