PS Magazine - TB 43-PS-696
PS, The Preventative Maintenance Monthly
ISSUE 696
NOVEMBER 2010
48
PS 696
NOV 10
49
PS 696
NOV 10
S
pring and winter months at the worksite can fool you from day to day.
Mud is wet and soft during the day, but at night it can freeze as hard as concrete. A
vehicle left sitting in the mud at day’s end will be frozen in the mud by morning.
It doesn’t matter if you’re in the DEUCE, D5B or D7G tractors, or the M9 ACE—don’t
rock or bounce a frozen vehicle loose! You’ll end up with broken track and snapped drive
sprocket teeth, not to mention a vehicle that’s still stuck and going nowhere.
Here’s how to prevent that problem before the sun goes down:
•±
Park your vehicle on high ground if possible. Water drains downhill, so the mud
won’t be quite as deep.
•±
Avoid parking in deep
ruts worn by other
vehicles. Some are deep
enough to bottom out
your vehicle’s hull. Leave
it there and you won’t
be moving until the
weather warms up.
•±
Use a shovel to scoop
out mud that has
collected on and around
drive sprockets. If there’s
no mud, it can’t freeze.
O
perators, when temps drop below 60°F, use the hydraulic unloading valve to make
starting the 130G road grader’s engine easier. It’s located by the driver’s left-foot.
When you depress the valve, you’re letting the vehicle’s hydraulic pump spin free
with no pressure, which reduces the load on the engine starter. This procedure saves a
lot of wear and tear on the starter and pump when the hydraulic fluid gets thick and
sluggish during cold weather.
As the engine warms up, do not let your foot off the valve too fast. That forces too
much pressure from the pump into the system’s main hydraulic lines. The end result is
blown seals with lots of leaks.
So, ease off the hydraulic loading valve when using it!
130G
Road
Grader…
Use Hydraulic
Unloading
Valve in the
Cold!
Construction Equipment…
Stuck in the Mud???
•
Avoid parking in deep
ruts worn by other
vehicles. Some are deep
enough to bottom out
your vehicle’s hull.
Leave it there and you
won’t be moving until
the weather warms up.
don’t park me
in deep ruts
worn by other
vehicles!
you
had
to leave me
in the mud overnight.
now i’m
stuck in it
because it’s
frozen!
keep this
tip in mind
before
the day’s
run!
do not push down on the
valve during operations. That
also causes unnecessary
wear and tear on the
grader’s hydraulic system.
one
more
thing!
After warm up, slowly release valve!
696.48-49.indd
1-2
10/5/10
11:07 AM
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