PS Magazine - TB 43-PS-609

PS, The Preventative Maintenance Monthly

ISSUE 609

AUGUST 2003
PS Magazine - TB 43-PS-609 - Page 14 of 33
Question:
What happens to your 22-ton crane when
the weather changes from warm days to cool nights?
PS 609
25
Fan Bolt Jolt
M
echanics, you’ve got to keep an eye on the 22-ton crane’s engine cooling fan
bolts. These bolts were not torqued properly at the manufacturer.
One loose bolt causes the other fan bolts to come loose. Eventually, the bolts
shear off and the fan is propelled into the radiator, fan shroud and coolant or
hydraulic lines. A busted coolant or hydraulic line means a loss of fluid—causing
extensive damage to the crane’s engine.
PS 609
AUG 03
24
22-Ton Crane…
Adios to Water and Crud
Answer:
A sweatbox forms in the vehicle’s fuel tank.
That means you operators have to drain the fuel/water separator before each day’s
operation. Not draining the separator will leave water and crud in the vehicle’s fuel
system. Then the engine runs rough.
.. or not at all.
Open the separator—located behind
the roadside engine access door—by
turning its drain cock counterclock-
wise. Store drained fuel in an approved
waste container. Never dump it down a
drain or let it run on the ground from
the separator’s drain hose.
If the fuel is clear, you’re OK. If the
fuel doesn’t run clear after you’ve
drained half a pint or so, close the
valve and report it to your mechanic.
Also, make sure your mechanic
replaces the fuel filter at semiannual
service time.
you,
too!
oog!
I’m full
of water
and crud!
Here’s what
needs to be
done to get a
look at those
fan bolts…
•
Remove the battery disconnect key.
•
Remove the engine hood panels like
it shows in TM 5-3810-307-24-1-1.
•
Loosen the “T” clamp on the
turbocharger (right side, front of
the engine next to the air charger)
and work the bellows loose until
the tube end is out of the way.
•
Remove the four 7/16-in bolts that
hold the fan guard in place.
what’s the
problem?
I’ve got
the ol’ fan
bolt jolt!
Drain fuel/water
separator before
operation
all right,
bob. have
a good
night!
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