PS Magazine - TB 43-PS-743
PS, The Preventative Maintenance Monthly
ISSUE 743
OCTOBER 2014
19
PS 743
OCT 14
18
PS 743
OCT 14
o
perators, when it comes to hydraulics, the M9 armored combat earthmover (ACE) is
known for being very temperamental, especially when dealing with hard-packed dirt.
Experienced operators have a rule
of thumb: They take a break and
shut down every two hours during
operations. During that break, they
check
for
problems,
especially
hydraulic ones.
To make hydraulic checks easier at
the worksite, leave the earthmover’s
ejector out about two feet. With
the ejector forward, there’s enough
room to look behind it for a busted
compensation pump or leak in the
valve bank.
Hydraulic Fluid Level
Before you check the oil level in your vehicle’s hydraulic reservoir tank, make sure
the ACE is in SPRUNG mode with the engine off, ejector retracted (back), apron down
and hydraulic pressure relieved.
Why retract the ejector? The oil that’s used to extend the cylinder inside the bowl
isn’t in the hydraulic reservoir tank to be measured. It’s in the cylinder doing its job.
So if you measure the Fuid level with the ejector extended, the hydraulic oil level
appears low.
Get the ScOp on
Hydraulics
M9 ACE…
Get the ScOp on
Hydraulics
With ejector forward, check for hydraulic leaks
this
dirt
is nice and
soft.
but when you get to
the
hard stuff,
make
sure you check my
hydraulics!
Construction
my partners
want your
attention.
R
ead
about M9 ACE,
hydraulics, ATLAS
fork extensions, and
6k VRRT forklift
solenoids.
743 18-19.indd
1-2
8/25/14
12:12 PM
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