PS Magazine - TB 43-PS-590
PS, The Preventative Maintenance Monthly
ISSUE 590
JANUARY 2002
PS 590
JAN 02
23
SEE…
T
he small emplacement excavator’s
spare tire weighs 170 pounds. If it’s not
locked into its mount carrier, it becomes
an unguided missile when the SEE
takes a turn.
That bouncing 170 pounds can dam-
age another vehicle, cause an accident,
or kill someone.
So before operation, make sure the
spare tire is held in place with the carri-
er mount’s holder. You’ll see the holder
inside the spare tire’s wheel, right
behind the driver’s side of the cab.
If the tire holder is missing, have
your mechanic replace it with NSN
2590-01-242-6712. The tire lock is Item
5 in Fig 186 of TM 5-2420-224-24P.
PS 590
JAN 02
22
621B Scraper…
Keep Guide Rollers Lubed
T
wo grease fittings that lube the left and right guide rollers on the scraper’s bowl
are often forgotten because they’re under the bowl in the back of the vehicle.
Each roller moves back and forth when the bowl is emptied. Without lube, the
rollers lock up and drag along the roller ramp. If you see a groove or slide mark
on the ramp, it means the roller isn’t turning freely.
A roller that won’t turn causes the other side of the bowl to drag. The end result
is a lot of wear and tear–and possible damage–to the bowl and its ejector.
So don’t let that happen to your scraper. During scheduled services, be sure to
lube each roller’s fitting.
Is spare tire
held in place?
watch
out!
Runaway
tire!
Don’t go yet!
you’ve forgotten
something down
here,
buddy!
…and
here,
too!
Keep guide
rollers lubed…
…or there'll
be wear here
590. 22-23 (C)
11/23/01
4:08 PM
Page 1
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