PS Magazine - TB 43-PS-705
PS, The Preventative Maintenance Monthly
ISSUE 705
AUGUST 2011
46
PS 705
AUG 11
47
PS 705
AUG 11
W
W
hat direction a tire is mounted on a vehicle is one conversation you’ll fnd in any
engineering battalion.
Tactical vehicles, like HEMTTs and M939-series trucks, use non-directional tires. That
means the tires can be mounted any way you want.
But, with the large tires used on
construction equipment, it’s a diFFerent
story. Those tires are designed For
oFF-road use in loose sand, dirt, mud
and gravel. When pointed in the right
direction, the driving tires’ chevron
pattern
provides
the
traction
the
vehicles need.
IF you’re not sure which way the tire
mounts, look at the direction arrow on
the tire’s sidewall. It shows you the way.
Tires on non-driving wheels can be
mounted either way.
So grab the clamp to see if it’s loose. If it is, get your
mechanic to re-torque the nuts to 70-80 lb-ft.
Between scheduled 250-hr services, look for loose
nuts, shiny spots or rust around the bolt heads and nuts
on both the front and rear air brake chambers. If you spot
any, tell your mechanic.
Tire Tread Direction:
What’s Right?
Construction Equipment…
Tire Tread Direction:
What’s Right?
MW24C
Scoop
Loader…
Clamp Down on
Air Chamber Clamp
when that
happens, air
leaks
from the chamber.
no air
means the
scoop loader has
no brakes!
operators,
vibration loosens
the nuts and bolts
that hold together
the brake actuator
air chamber clamp.
we
should’ve
checked
those
brake
clamps!
make sure my tires
are pointing in the
right direction
for better traction
in terrain like this!
Note rotation arrow
Tighten
nuts to
70-80
lb-ft
705 46-47.indd
1-2
7/8/11
5:14 PM
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