PS Magazine - TB 43-PS-563
PS, The Preventative Maintenance Monthly
ISSUE 563
OCTOBER 1999
PS 563
9
PS 563
8
OCT 99
rivers, when you uncouple the
M1000 HET semitrailer from the
M1070 tractor, make sure the
gooseneck’s isolation valve handle is
pulled out to the adjust (outward)
position.
If it isn’t, the gooseneck can fall,
damaging equipment, or worse, hurt
someone.
M1000 Heavy Equipment Transporter Semitrailer . . .
M1070 HET Tractor . . .
In the up (closed) position, there’s
no oil flowing through the hydraulic
lines. Then the APU’s hydraulic pump
isn’t pumping anything but air. That
burns out the pump.
on the hydraulic oil tank is in the down
(open) position.
Park with
gooseneck
in lowered
position
Likewise, when you park the semi-
trailer, make sure the gooseneck is in
the lowered position. Left in the el-
evated position, the gooseneck can drop
without warning.
Hydraulic Tank Handle
Prior to running the auxiliary pump
unit (APU), make sure the valve handle
THIS POWER
STEERING HOSE
IS
TOUCHING
THE
EXHAUST PIPE.
YEAH, WE'D
BETTER
ADJUST
IT AWAY
FROM THE PIPE OR
USE A
WIRE TIE
BEFORE
THERE'S A
FIRE
.
A BURNED-OUT
PUMP MEANS
NO
OIL CAN
FLOW THROUGH THE HYDRAULIC
SYSTEM. NO HYDRAULIC SYSTEM
MEANS THE SEMITRAILER
IS
NMC
.
PS 563
9
PS 563
8
OCT 99
ext time you have the engine covers off an M1070 HET tractor, note how
close the power steering hose is to the exhaust pipe.
If the hose and pipe touch at all, you’ve got a big problem waiting to happen.
A hole rubbed or burned into the power steering hose means hydraulic fluid on
the exhaust, and that means a fire.
Since the power steering hose is not very flexible, moving it away from the
exhaust pipe will be tough. Try to use a wire tie to get space between the hose
and pipe. NSN 5975-00-156-3253 gets 100 ties that are 13
1
/
2
inches long.
If that won’t work, you’ll have to reposition the hose. Loosen it at its connec-
tions and turn the hose so it is as far away from the pipe as possible.
Valve
handle
must be
down
to run
APU
Pull
isolation
valve
handle out
to prevent
gooseneck
from falling
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