PS Magazine - TB 43-PS-558
PS, The Preventative Maintenance Monthly
ISSUE 558
MAY 1999
Take a look inside hydraulic
compartments for leaks, low
fluid levels, cracked glass on
gauges, and damaged or corroded
fittings.
Check cables and hoses for torn
or worn insulation, loose clamps,
or missing spiral wrap and netting.
Check out the propulsion system
for oil leaks, worn tires, correct
tire inflation, missing wheel lug
nuts, damaged brake cables, loose or missing fasteners, bent or broken springs,
broken or loose terminals, and loose or missing brush terminals.
Before you switch on the AGPU, make sure the hydraulic reservoir is at least
3
/
4
full. Low fluid levels can
damage the hydraulic pump.
Hydraulic fluid in an
AGPU is pressurized up to
3,300 psi. Make sure you
wear eye and hearing
protection and gloves when
operating the hydraulic system.
PS 558
39
PS 558
38
MAY 99
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Aviation Ground Power Unit . . .
ü
ü
ü
ü
our aviation ground power unit (AGPU) has to be there when you need it.
You’d be hard-pressed to do your job without it.
So, never forget that an AGPU needs PM, too, just like your birds. Check TM
55-1730-229-12 for complete AGPU care, but take note of these tips.
Spot the Little Things
Here’s how to spot problems while they’re small and keep an AGPU in top
form. Report any problems.
Check the frame and housing. Look for dents, cracks, punctures, corrosion,
damaged hinges or broken latches on doors. Check doors for bent or broken
braces.
Take a close look at the control panel. Look for corrosion, missing parts, or
cracked or broken glass on the gauges.
Check the battery for a loose or missing holddown or guide, missing or
damaged vent drain tubes, and loose or damaged connectors. Check the electro-
lyte level, too.
Eyeball the engine compartment for oil or fuel leaks, corrosion in the air
intake duct, loose or missing bolts, or damaged hoses.
well,
that
was a
good day's
work
!
yeah, just
don't forget to
take
care of
me
!
Check cables and gauges
Use eye, hearing and hand protection
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