PS Magazine - TB 43-PS-606
PS, The Preventative Maintenance Monthly
ISSUE 606
MAY 2003
PS 606
MAY 03
51
PS 606
MAY 03
50
SEE…
Essence of
PM
Use Right Tire PSI
There are some excavators out there with the wrong
tire pressure, 55 psi (highway) and 45 psi (off highway),
marked on the fenders. The excavator needs just 40 psi
per tire for both highway and off-road driving. More air
than that leads to sidewall damage. So have your
mechanic paint “40 PSI” on each fender as a reminder.
Sneaky Tire Leak
Working in the rough stuff plays havoc with tire pressure. Small rocks get stuck
between the tire and wheel rim. If enough rocks get stuck, the tire can develop a leak.
So eyeball the wheel assembly for rocks wedged between the tire and rim. If you
see small rocks stuck between the tire and the rim, let your mechanic know. Check
that the tire is re-inflated to 40 psi.
Access Cover Exposed
The access cover for the excavator’s rear hydraulic oil filter holds water. Water
causes rust which deteriorates the cover.
In some cases, the cover springs a leak—like a geyser—when the engine is work-
ing hard during backhoe operations. Those operations come to a screeching halt
when the hydraulic system loses fluid.
So eyeball the cover. If it’s in bad shape with lots of rust, report it.
Your mechanic can replace a cover with NSN 5340-01-235-2151. Or he can sand
away the rust and use CARC paint, NSN 8010-01-229-7546, for touch-up.
Here are
just a few
of ‘em.
listen up
boys! this is
how you take
care of your
see…
Make sure
it’s 40 psi for
on and off
highway—both
front and
back tires!
eyeball the
cover to see
if it’s in bad
shape.
Look for
rocks
wedged
between the
tire and rim.
Seasoned
operators are
the essence of
preventive
maintenance.
They pick up PM
pointers that
others have
found out the
hard way.
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