PS Magazine - TB 43-PS-559

PS, The Preventative Maintenance Monthly

ISSUE 559

JUNE 1999
PS Magazine - TB 43-PS-559 - Page 4 of 34
PS 559
5
JUN 99
PS 559
4
JUN 99
epairmen, when you
install a new FMTV speedom-
eter, you have to make the right
switch settings on the back of
the speedometer to make sure
it will register the right mph.
The switches are on the back
of the speedometer under a
cover. Since the information
you need to set the switches is
in none of the FMTV TMs, set
them like this from left to right.
Brake Caging for 5-tons
I
f you haven’t caged locked-up rear brakes on a 5-ton model FMTV, make this
mental note for when you do.
You must remove the shock absorber
from its bottom mount to do the work.
There’s no room to get the caging
bolt into the back of the spring brake
chamber unless you disconnect the
shock. Trying to do anything else to
install the bolt may cross-thread the
brake chamber.
Eyeball Para 11-8 of TM 9-2320-366-20-3 for the procedure.
Deuce-and-a-half FMTVs do not require this extra step to cage their brakes.
f you’re still using the vampire pump and tubing to take oil samples on your
HMMWV’s engine and transmission, there’s an easier way: Simply install
valves, NSN 4820-00-845-1096, on both
the engine and transmission oil coolers.
Then you can put the sampling bottle
under the valve, open it and fill it cleanly.
That’s if the power steering oil cooler
isn’t in the way.
If it is, add an elbow, NSN 4730-00-
277-5553, to the sampling valves to get
them far enough away from the oil cooler
to add a piece of hose, NSN 4720-01-
159-5796, to the valve with clamp,
The elbow stays with the valve, but
remove the hose after sampling. Use a
new piece of hose for each sample.
Info on this change is in TB 43-0001-
39-8 (Mar 96). If your local TACOM logistics assistance representative doesn’t
have a copy, write, call or e-mail Half-Mast.
HMMWV . . .
Family of Medium Tactical Vehicles . . .
Adjust new speedo settings here
but i'm
sure i
wasn't
speeding
! i was
watching the
speedometer!
yeah, sure.
that's what
they
all
say.
that
vampire
pump
is
old
hat
! let's install
a
sampling
valve
.
maybe
i need one,
too
!
To cage
rear brakes,
disconnect
shock’s
bottom
mount
•
Switches 1 and 2
:
up
•
Switch 3
:
down
•
Switches 4 and 5
:
up
•
Switches 6 and 7
:
down
•
Switch 8:
up
•
Switch 9
:
down
•
Switch 10
:
up
Sampling valve
Sampling valve with elbow
PS 559
5
JUN 99
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