PS Magazine - TB 43-PS-739
PS, The Preventative Maintenance Monthly
ISSUE 739
JUNE 2014
24
PS 739
JUN 14
25
PS 739
JUN 14
C
rews, not servicing the turret on your Kiowa Warrior’s mast-mounted sight (MMS)
can lead to problems.
When servicing the MMS, take your readings with the MMS in the OFF position.
If the coolant level indicator reads between +60°C and ambient minus 10°C, no
servicing is required, like it says in Para 8-16 (9) of
TM 1-1520-248-10. When
adding coolant, follow the info in EM 0246, WP 2875 00.
After you’ve added coolant, check the sight
glass again to make sure the temperature
reading is normal. If the reading is between
60°C and the ambient temperature minus
10°C, no service is required. The color should
be yellow or white, with white being the most
common
ambient
temperature.
The
level
should not be in red. Red is -120°C all the way
to 0°C. That’s not good. If the reading is above
60°C, you need to drain the excess coolant
from the system.
Never over±ll the MMS with antifreeze. Too much coolant overpressurizes the
system. That can cause coolant lines to burst inside the MMS.
Over time, additives in the antifreeze can form gummy deposits and block
coolant
circulation, causing the turret to overheat. If that happens, it’s probably time for a
coolant change.
Remember, there is a 300-hour inspection requirement to drain, ²ush and re±ll the
system with fresh coolant. Follow the procedures in EM 0246, WP 2878 00.
S
ometimes the simplest maintenance task on your Kiowa Warrior can turn into a lot
more than you bargained for.
For instance, rotating or folding rotor blades should be a no-brainer, right? But
when you use the tie-down wand assembly, NSN 1730-01-185-8877, things can get a
little slippery.
The wand assembly is placed under the blade to lift it. While rotating or folding,
the blade can slip off the top of the wand even if you’re moving very slowly. If that
happens, the blade drops from an elevated position damaging the blade cuff, the hub
and the root of the blade.
To keep the blade from slipping off the wand, wrap some duct tape around the
wand to create a top. Then add another piece of the tape to cover the exposed sticky
side so it doesn’t come in contact with the painted surface of the blade. Duct tape is the
simplest method but another option is to use some strap webbing.
Then you can easily slide the wand onto the blade. The tape over the top and sides
keeps the blade from sliding off.
Make a note that the wand assembly is a part of the Kiowa Warrior’s ²y away items.
OH-58D…
Servicing the
Mast-Mounted Sight
OH-58D…
Keep Blades
Off
S
l
ippery
S
l
ope
Always check temperature
tape before flight
Wand assembly with
no top slips off blade
Wrapping duct tape to
create top prevents slips
OK, I’m tired
of this tool
slipping!
boy,
does my
MMS need
some
juice!
don’t you
worry. I’ve
got you
hooked up
with the
coolant
you need!
739 24-25.indd
1-2
4/21/14
3:05 PM
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