PS Magazine - TB 43-PS-554
PS, The Preventative Maintenance Monthly
ISSUE 554
JANUARY 1999
PS 554
37
JAN 99
Replace springs
that measure
less than
23
1
/
4
inches
Old double-
strand spring
uses thinner
guide rod
New single-
strand spring
uses thicker
guide rod
f you armorers don’t measure up, you can’t expect your M60 machine guns to
fire successfully.
Firing compresses the recoil spring. If the spring shortens to less than 23
1
/
4
inches, bad things happen—poor recoil, double feeds, jamming.
After every trip to the range, get out your ruler and measure the recoil springs.
Replace any that are too short.
Remember, too, that two different guide rods and recoil springs are in the
system and they can’t be mixed. The old spring is double-strand, while the new
spring is single-strand. The old guide rod is thin, while the new rod is thicker.
If you use the old guide rod with the new spring, the spring will be loose and
it will develop flat spots. Then you get jamming.
If you force the new guide rod into the old spring, you’ll damage the spring.
If the rod and spring don’t fit together easily—or snugly—don’t use them.
Order a new rod, NSN 1005-01-188-7877, or new spring, NSN 5360-01-203-
2973.
when it
comes to
my
recoil
spring
...
...always
follow
this
rule!
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