PS Magazine - TB 43-PS-742

PS, The Preventative Maintenance Monthly

ISSUE 742

SEPTEMBER 2014
PS Magazine - TB 43-PS-742 - Page 15 of 33
27
PS 742
SEP 14
Use TW-25B lubricant.
Units have found TW-25B works better than lubricants
like grease, molybdenum disulFde (GMD), especially in the desert. GMD attracts
sand, which hurts its ability to lube.
Before applying TW-25B, clean off the old grease with isopropyl alcohol. When
you lube the roller chain, drive gear/bearing and the bearing surfaces where the rotor
mates, apply a heavy coat of lubricant. Use a brush or a caulk or grease gun to apply
it. When you’re Fnished, white grease should be visible and plentiful.
Make sure you don’t get TW-25B on areas of the feeders that contact ammo and
limit the amount you apply to areas that the feeders slide on.
But you should still use GMD on parts of the gun not exposed to sand, such as the
constant speed drive.
Order a 4-oz tube of TW-25B with NSN 9150-01-439-1873 or a 32-oz jar with
Clean the contacts on the contact box.
Dirty contacts can cause a ROUNDS
DECREMENT ±AIL when you try to Fre.
Even a brand new electrical box for the
M230 has a thin layer of anti-corrosion
coating that may interfere with Fring
voltage. Just wipe these contacts with a
clean cloth to ensure a good connection.
Check
forward
Fex
chutes
before
use.
Corrosion, bent or broken links and
improper installation can all cause the
ammo system to jam. Even new chutes
need to be inspected for proper assembly
and lubrication prior to installation.
Use a brush, cloth, or syringe
to apply a light to moderate coat
of TW-25B to the forward and
aft tracks, bolt and cam area,
bolt locking lugs, receiver walls,
breech barrel support, gun support
bearings, rails, and chutes. When
you’re
Fnished,
white
grease
should be slightly visible.
How The Vest Was Won
Part 2
Use
TW-25B
on gun
parts
such
as the
rail…
…and on the
roller chain
Make sure forward flex chute’s straight
connecting links are properly assembled
before
you install chute
How The Vest Was Won
Part 2
last month,
I began telling the
story of the
best
decision
I ever made!
you met the gOod people
of the wagon train
headed west in search of
better lives…
…and
you met the
ne’er-do-well
Lex
Doiley
of whom
the less said, the
better.
AND
NOW
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7/22/14
2:01 PM
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