PS Magazine - TB 43-PS-562
PS, The Preventative Maintenance Monthly
ISSUE 562
SEPTEMBER 1999
PS 562
7
SEP 99
PS 562
6
SEP 99
Check valve installed correctly?
M1074 PLS Tractor . . .
Look for the word “TOP” imprinted on a valve flat at the inlet end. If the word
“TOP” is parallel to the top of the fuel tank, the valve’s installed right. Other-
wise, it must be reinstalled.
This info will be added to Para 4-6 of TM 9-2320-364-20-2 and to the
troubleshooting procedures in the -20-1.
A clogged valve is a real possibility because fuel tank gunk doesn’t get filtered
out until after the fuel passes through the check valve.
as this happened to you?
Your M1074 tractor
doesn’t start right off.
But, you keep cranking
and eventually the engine
coughs into life. It runs
very rough for a while,
then idles normally.
You have no more
starting troubles that day,
so you shut down and the
truck sits overnight.
The next morning you
go through the same hard-
starting stuff.
So, what’s the problem?
Have your repairman
check the one-way check
valve on top of the fuel
tank. It’s supposed to keep fuel from draining back into the tank after shutdown,
so there’s fuel available at startup. If the valve is installed wrong, or is defective
or clogged, fuel drains back into the tank, making for hard starts next time or
no starts at all.
these
tm
updates
will
really get me
rolling
!
it doesn't
take a
doctor
to
diagnose
a fuel
tank check valve
problem
.
Look for "TOP"
PS 562
7
SEP 99
harpen your pencils, mechanics, and make these changes to the palletized
loading system (PLS) tractor truck’s TM 9-2320-364-24P.
Aftercooler Filter Kit
The foil filter element in the PLS’s
aftercooler filter assembly is made to be
cleaned and reused. But, if the element gets
torn or becomes unusable, order a filter kit
with NSN 5330-01-377-2460. The kit includes
Items 2-10 and 13 from Fig 231.
Winch Drum
NSN 3950-01-389-3600 gets the hand-operated winch
drum on the tractor truck’s spare tire carrier. The parts
info shown for Item 35 in Fig 318 is wrong.
Quick Disconnect Coupling
NSN 4730-01-347-0828 gets the quick disconnect
(female) coupling shown as Item 9 of Fig 20 and Item
30 of Fig 264. The NSN shown in the TM is no longer
available.
CTIS Tube Assembly
Need a left-hand or right-hand tube assembly for
your tractor truck’s CTIS wheel valves? Order NSN
4710-01-425-2122 for the right-hand assembly and
NSN 4710-01-357-5666 for the left. Make a note of
these NSNs until they’re added to Item 15 in Fig 266.
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