PS Magazine - TB 43-PS-680

PS, The Preventative Maintenance Monthly

ISSUE 680

JULY 2009
PS Magazine - TB 43-PS-680 - Page 4 of 33
5
PS 680
JUL 09
W
hen was the last time you checked and topped off the FRH level in your tank’s
replenisher, crewmen? If you haven’t been doing the before and after PMCS checks,
you could be putting yourself in danger!
If the hydraulic fluid level is
below the MIN LEVEL mark
on the replenisher, the main gun
could recoil out of battery the next
time it’s ±red. When that happens,
the cannon shears its retaining
bolts and slams into the ammo
compartment.
M2A3/M3A3 Bradley Servo Power Amp
Use NSN 7025-01-542-3024 to order a new Block 1 servo power amp for your M2A3/
M3A3 Bradley. NSN 7025-01-542-3026, which is listed for Item 13 in Fig 132 of TM 9-2350-
294-24P-2 (Sep 00 w/Ch 5, Feb 07), brings a pintle pin.
M1A1 TUSK Thermal Sight/
Day TV System Kit NSNs
Fig 6F12 of TB 9-2350-264-12&P-1 (Aug 07) lists the wrong NSNs for the power ±lter
module, wiring harness and bracket used on the M1A1 TUSK’s (Tank Urban Survivability
Kit) thermal sight/day TV system kit. Use NSN 6150-01-553-6539 for the wiring harness
shown as Item 1. NSN 2350-01-553-6537 brings the power ±lter module listed as Item 2.
Use NSN 5340-01-553-6540 to get the bracket shown as Item 7.
4.
Uncoil the hose by sliding it out of the six retaining clips around the outside of
the replenisher.
5.
Extend the hose through the loader’s hatch.
6.
Put the small BII funnel, NSN 7240-00-404-9793, in the hose and slowly add
FRH, NSN 9150-00-111-6256, until the fluid level reaches the MIN LEVEL mark
on the replenisher.
7.
Remove the funnel, slide the hose back through the retaining clips and reattach it
to the plug on top of the replenisher.
8.
Depress the main gun slightly below the level position.
9.
Loosen the bleed plug below the
gun mount ID plate using a
9
/
16
-in
socket and wrench. Allow all the air
to escape until you see FRH starting
to flow from the bleed plug, then
retighten it. Wipe up any FRH with
a rag and dispose of it properly.
10.
Recheck the FRH level in the
replenisher. If the fluid level is still
below the MIN LEVEL mark, go
back to step 3.
1.
Park the tank on level ground.
2.
Make sure you’re wearing long sleeves
(rolled down), rubber gloves, goggles and a
faceshield. FRH contains a chemical which
can cause paralysis if it’s taken internally.
FRH can also be absorbed through the skin, so
wash thoroughly with soap and water if you
get any on you.
3.
Disconnect the hose from the plug on the
top right side of the replenisher.
M1-Series Tanks…
Low Replenisher Level
Is
Bad
News!
if the fluid
level in the
replenisher
keeps going
down over time,
report it.
you could have a
class III leak.
if the
replenisher
oil level is
low, add
some frh
now. here’s
how…
You’re looking
a little
rough
today. Anything
I can do?
Disconnect hose here
Loosen bleed nut to let out air
Yeah. A little
FRH for my
replenisher
would help!
680.04-05.indd
1-2
6/1/09
5:03:07 PM
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