PS Magazine - TB 43-PS-574
PS, The Preventative Maintenance Monthly
ISSUE 574
SEPTEMBER 2000
PS 574
35
SEP 00
ou’re servicing your unit AGPU’s hydraulic reservoir vent dryer as outlined in
Para 4-92 of TM 55-1730-229-12.
You find it’s time to toss the old desiccant because it’s less than the 25 percent
blue called for by Item 8 in the operator’s PMCS, but you don’t have any new
desiccant on hand.
No sweat, just fire up the nearest
oven. Until the new desiccant comes
in, you can just bake the blue back
into the old stuff. As long as its origi-
nal color returns, it’s good to go. Of
course, always use fresh desiccant
when you can.
To reactivate desiccant, bake it in an
oven at 350º for 4 hours or until the
original blue color returns.
The blue color tells you the desic-
cant is ready to take out any moisture
in the hydraulic fluid.
A change to TM 55-1730-229-12 will add the baking info. A change to TM 55-
1730-229-24P will add NSN 6850-00-680-2233 for the desiccant.
Aviation Ground Power Unit . . .
If desiccant
has lost its
color, bake it
yum-yum!
nothing says
lovin’
like
desiccant
fresh
from the
oven
!
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