PS Magazine - TB 43-PS-742
PS, The Preventative Maintenance Monthly
ISSUE 742
SEPTEMBER 2014
20
PS 742
SEP 14
21
PS 742
SEP 14
o
perators, keep this tip in mind when temps drop below 60°F:
Use the road grader’s
hydraulic unloading valve to make starting the engine easier.
The valve is located next to your left foot when you’re sitting in the cab.
When
you press it, you’re letting the vehicle’s hydraulic pump spin free with no pressure.
That reduces the load on the engine starter.
It also saves a lot of wear and tear on the
starter and pump when the hydraulic ±uid gets thick and sluggish in cold weather.
As the engine warms up, don’t let your foot off the valve too fast.
That’ll force too
much pressure from the pump into the system’s main hydraulic lines.
The end result
is blown seals and lots of leaks.
Slow and easy is the way to go when easing off the hydraulic loading valve.
M
echanics, if you need to install
a new starter on the engine of a
HYEX 230LCR excavator, wait
a second.
There’s only one starter listed
in TM 5-3805-280-23P-1 (Jul 11).
But there are actually two different
starters available. Both are very
distinct in shape and color, so as
long as you know the NSNs, you
should have no problems getting
the right replacements.
NSN 2925-01-473-9544 is
the one shown as Item 3 in
Fig 100 of the TM.
It comes in
a black housing.
The other starter is NSN 2920-
01-510-1834 and comes in a gray
housing.
Make a note until this
starter is added to the TM.
After warm up, slowly release valve!
Hydraulic
Unloading
Valve
Reminder
-
c
h-
130G Road Grader…
Hydraulic
Unloading
Valve
Reminder
HYEX
230LCR…
Engine Starter Could Be a Stopper!
One more thing:
Don’t accidentally
push down on the
valve while operating
the grader.
That causes
unnecessary wear
and tear on the
grader’s hydraulic
system.
c’mon!
we’ve got
a
lOtTa
work to
do. why
won’t you
start?!
maybe
you could
use my
hydraulic
unloading
valve? it’s
cold
out
here!
Black starter, NSN 2925-01-473-9544
Gray starter, NSN 2920-01-510-1834
so, what’s the
status on my
new starter?
I got the
new one in,
but it’s
not
the same as
your old
one!
Well,
that’s a
real
show
stopper!
c
hu
g-c
hfF
±F
f
c
h-
c
h-
c
h-
c
hu
g-
c
h
-
c
742 20-21.indd
1-2
7/31/14
4:48 PM
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