PS Magazine - TB 43-PS-676
PS, The Preventative Maintenance Monthly
ISSUE 676
MARCH 2009
7
PS 676
MAR 09
1.
Park the vehicle on a level surface.
2.
Start the engine and operate
the electromagnetic clutch for Fve
minutes.
3.
Shut off the engine.
4.
Open the sub-floor access door
and wipe clean the area around the
bayonet gage to keep dirt out of the
electromagnetic clutch.
5.
Pull and wipe the bayonet gage.
6.
Reinsert the gage, remove it again
and make sure the oil level reaches
the full mark (between MIN and
MAX) on
the gage.
PTO Drive Shaft
The PTO drive shaft must be lubricated monthly following the instructions in WP 0187
00-81 of TM 9-2350-292-20-1 (EM 0266, Jun 07).
Lubricate the three or four grease Fttings on the U-joints, slip joint and PTO driveshaft
quick-disconnect (if your vehicle has one).
The TM does not state or show the driveshaft’s U-joint located at the PTO’s electro-
magnetic clutch side, so this is often missed. Lack of lubrication in any of these
locations will lead to premature bearing failure and broken parts.
it’s critical that the
clutch’s oil level be
checked
every day
as part of after-
operation pmcs.
you’ll find the check
in wp 0105 00-35 of
tm 9-2350-292-10
(nov 05 w/ch 1, jun
0
7
) and in table 6
of the lubrication
instructions in wp
0105 00-
77
.
a lot of
electromagnetic
clutches, nsn 2520-
01-480-
7
818, on the
m88a2 have been
failing lately.
turns out
crewmen have
been running
‘em with
little
or no oil.
when that
happens, the
clutch burns
up and you’ve
got no
power to the
hydraulic
pump.
a new
clutch
costs
more than
$28,000!
Oil level
between
minimum
and
maximum
on gage
If the level is low, add OE HDO-10 oil through the bayonet gage hole.
Keep adding oil until the level reaches the full mark on the gage.
how
come?
there’s another
reason you
don’t want your
clutch to fail.
what
happened?
The electro-
magnetic
clutch burned
out! We won’t
be lifting any-
thing today!
M88A2 Recovery Vehicle…
the electro-
magnetic clutch on
my m88a2 burned up!
yours,
too!?
and
mine!
Max
Min
676.06-07.indd
1-2
1/27/09
2:39:00 PM
Click here for a copy of this article to save or email.
Back to TopBack to Top
