PS Magazine - TB 43-PS-666
PS, The Preventative Maintenance Monthly
ISSUE 666
MAY 2008
O
perators, it takes the right amount of hydraulic fluid to lubricate the excavator’s
boom and keep it operating smoothly. That is, as long as the hoses are in good shape.
The excavator’s hydraulic hoses get
brittle from constant exposure to the
elements. The biggest trouble spot is
where the hoses are routed along the
boom and arm.
There’s something else that causes
hose damage—buzzards!!! They’ll actually
sit on the boom and start pecking at the
hoses. Go Fgure! Eventually, the hose will
deteriorate until it springs a leak.
Look for stains along the boom and arm
hoses when tracking down a leak.
Pinhole
leaks in a high-pressure system can
penetrate both the skin and clothing.
So, use a piece of cardboard—not your
hand—to Fnd the leak.
54
PS 666
MAY 08
55
PS 666
MAY 08
A
little lube goes a long way when it comes to the three grease fttings on the hydraulic
pump’s driveshaFt.
These fttings are oFten overlooked
during scheduled services. Without
lube, the U-joints on the pump’s
driveshaFt shake loose From vibration
and excessive wear. And, the shaFt’s
bearings rust and burn out.
Eventually,
the driveshaFt
and
pump
stop
working.
Then
no
hydraulic fluid gets pumped to the
grader’s blade, circle drive, scarifer
or Front wheel tilt. These components
shut down and your grader is NMC.
So keep the pump’s driveshaFt
lubed. During scheduled services
every month, give each oF the fttings
Four or fve pumps oF grease.
HydrauliC Pump
Driveshaft
Lube
130G Road Grader…
HYEX…
Hydraulic System PM
your grader’s
grease fittings
can be
hard
to find.
make sure you
get the guys
hiding in here
Give each ftting 4-5 pumps oF grease
if you find a leaking
or damaged hose,
call in your mechanic
to replace the hose.
hey you
buzzards…
…go
some-
where
else!!!
what’s his
problem?
beats
me!
HydrauliC Pump
Driveshaft
Lube
666.54-55.indd
1-2
3/28/08
5:44:33 PM
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