PS Magazine - TB 43-PS-584
PS, The Preventative Maintenance Monthly
ISSUE 584
JULY 2001
PS 584
JUL 01
41
Don’t Replace the Replacement
C
rewmen, the idea behind the MLRS’ line replaceable units (LRU) is a good one.
Instead of significant downtime to troubleshoot and repair a particular equipment
failure, you simply pull the affected LRU and replace it—usually with a rebuilt one.
To keep that system working, though, you’ve got to properly mount the replace-
ment LRU.
Some crewmen put off snugging down the LRU mounting bolts because they’re
hard to reach. They figure if the rebuilt LRU is defective they will save time when
they have to pull it out for another replacement.
But if you don’t bolt down the
LRU, it gets bounced around dur-
ing operation. That damages the
circuit cards inside and then it’s
time to replace the LRU yet again.
Save yourself a headache and
your unit some significant repair
costs. Always snug down the LRU
mounting bolts
before
operating
the vehicle.
PS 584
40
Monthly, pull the batteries and check
the battery box for corrosion. If you
find any, remove it with your wire
brush and the baking soda-water solu-
tion. If corrosion has eaten off the bat-
tery box paint, repaint with the paint,
NSN 8030-00-290-5141, listed as Item
29 in TM 9-1425-433-10's expend-
able/durables list in Appendix D.
Of course, if the vehicle's batteries
are in bad shape, you'll have trouble
charging the Avenger batteries. So,
when you do system battery services,
pull the seat and check the HMMWV's
batteries for corrosion. Your repairman
services the vehicle batteries.
In the Field
Keep the slave cable connected at all
times. The Avenger runs on both the
system and vehicle batteries.
If you must operate with the truck
shut off, keep an eye on the Avenger
battery indicator. Once it shows below
85 percent, start the truck and recharge
the batteries.
Keep slave cable
hooked up
Recharge when
indicator drops
below 85
Don’t forget to check vehicle
batteries for corrosion
Pull batteries monthly and
check box for corrosion
Snug down
mounting bolts
After
this
little trip,
I’m gonna
need a new
LRU…
maybe two!
84
MLRS Launcher…
584. 38-41 (C)
6/6/01
7:30 PM
Page 3
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