PS Magazine - TB 43-PS-702

PS, The Preventative Maintenance Monthly

ISSUE 702

MAY 2011
PS Magazine - TB 43-PS-702 - Page 6 of 32
9
PS 702
MAY 11
Dear Editor,
A broken driveshaft, NSN 3040-00-903-0908, from the blower
housing in an M113-series vehicle’s 6V53 or 6V53T engine is a real pain.
It can take a long time to get a stuck driveshaft out, so you really want
to make sure the blower rotors will turn. Otherwise, the new driveshaft will
snap and you have to start all over again.
Thing is, you can’t check the rotors because your hands won’t fit inside
the housing. Most mechanics put in the new driveshaft and cross their
fingers!
Not us! We’ve made a homemade tool that allows you to check the rotors
before installing the new driveshaft.
Take the broken end of the driveshaft you just removed and weld a long
bolt to the end of it. Insert the driveshaft end of the tool into the blower
housing and try to turn the bolt, either by hand or using a socket wrench.
If the rotors turn, you’re in good shape for installing the new driveshaft. If
not, you’ll have to install a new motor rotor, NSN 6105-01-234-1037.
SGT Nickolus Brusco
D Troop, 5/4 Cav
Ft Riley, KS
Editor’s note:
An excellent idea, Sergeant! And to remove the broken driveshaft,
you might want to try the idea we ran on Pages 6-7 of PS 615 (Feb 04):
Cut off the small end of a chem
light and pour out the contents
in
an
approved
HAZMAT
container. Push the open end of
the chem light frmly onto the
broken driveshaft and pull. The
chem light fts snugly enough to
create a vacuum so the driveshaft
usually comes out.
You’ll fnd instructions on how to make a similar tool in that article, as well.
Broken
Driveshaft?
M113-Series FOV…
Broken
Driveshaft?
Weld bolt to end of broken driveshaft
Homemade tool can also be made with steel rod
Cut off end of chem light
6-in steel rod
12-in steel rod
Weld
Weld
Broken
drive-
shaft
darn
my luck!
I shoulda knoWn
that new blower
housing drive shaft
was gonna
break!
Check
rotOrs
with this
tOol!
702.08-09.indd
1-2
3/28/11
10:32 AM
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