PS Magazine - TB 43-PS-697
PS, The Preventative Maintenance Monthly
ISSUE 697
DECEMBER 2010
50
PS 697
DEC 10
51
PS 697
DEC 10
Those steps take a hit when the grader’s
blade cuts a V-ditch, when the blade is
raised, or when it’s turned for travel.
That’s because the end of the blade is
under the cab. Operators can’t tell when
it’s about to snag the step and tear it off.
Unit mechanics can replace the old
step with a rubber step assembly that
bends forward and backward to keep from
getting banged up or ripped off.
Eyeball Para 3-19 of TACOM’s EIR
Digest TB 43-0001-39-8 (Mar 96) for info
on how to install the rubber step assembly.
Y
our unit’s grader went to the shop for annual checks and services. With those checks
and services came back something else: A whopping bill for a new turbocharger!
“How come?” you ask.
Well, while transported on the back of a semitrailer, the exhaust pipe on this type
of commercial construction equipment can face directly into the wind. That means
air is being forced down the exhaust pipe into the turbocharger during transport.
All that forced air causes the turbocharger’s impeller to spin without lubrication.
Without oil being pumped to the impeller bearings, they burn out. The end result is
no turbocharger.
•±
Use duct tape, NSN 5640-00-103-2254,
and tape over the exhaust stack. That way
no air gets forced down the stack and
into the turbocharger. Just remember to
remove the tape before startup.
•±
Have your mechanic loosen the exhaust
pipe’s pipe clamp. Turn the pipe so its
opening faces the back of the trailer. Make
sure to re-tighten the clamp.
130G Grader…
Banged-Up
Cab Step
130G Grader…
No
TurboCharger?
visit any
engineering
battalion and
you’ll see
road graders
with banged-
up cab steps.
with all this air
forced down my
exhaust pipe…
…my
turbo-
charger’s
had it!
if you don’t
have a copy
of the tb,
write me at
half.mast@
us.army.mil
Make sure opening faces back of trailer
So how
do
you prevent
turbocharger
burnout?
Here are two
ways…
697.50-51.indd
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11/1/10
5:44 PM
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