PS Magazine - TB 43-PS-674
PS, The Preventative Maintenance Monthly
ISSUE 674
JANUARY 2009
52
PS 674
JAN 09
53
PS 674
JAN 09
Steering Link
While standing at the articulation joint, look up and you’ll see several lube points
for the scraper’s hydraulic cylinder and steering link bearing. You’ll have to climb
up the vehicle to get at these Fttings.
±ive shots of lube for each Ftting provides the bearing and cylinder enough
“slide and glide” to help steer these vehicles. Wipe any gunk off the Ftting before
you start the lube job. That way you won’t pump any sand or dirt into the cylinder
or bearing.
Fan Bearing
Grease Fttings that lube the fan bearing and fan belt tightener are hard to Fnd.
They’re located up front, behind the fan blades.
Without lube, the fan clutch pulley’s bearing
can seize up. Then the blades stop turning
freely, causing the engine and transmission to
overheat.
The fan belt tightener puts the right amount
of tension on your scraper’s fan belt. Without
lube, its bearing will also seize up. That means
the fan belts come loose. They’ll slide or get
ripped off the pulley, causing the transmission
to overheat. Your construction operations come
to a screeching halt.
The two Fttings are next to each other. Lube
each Ftting every month or 250 service hours.
Some Lube Will Do
Without lube, the block’s sheaves,
trunnion and thrust bearings can seize
up. That causes excessive wear and
tear on the crane hoist cables and hook
block sheaves.
For smooth crane operation, lube the
hook block with GAA monthly or every
100 hours of use like it says on Page 1-4-9
of TM 5-3810-307-24-1-1.
Grease Fitting Caps
Once you ±nish lubing, how ‘bout
using protective caps on the hook block’s
grease ±ttings?
These caps keep the ±ttings clean and
unclogged. It’s easier to take a cap off
when it’s time to lube the ±tting than it
is to replace the ±ttings when they won’t
take grease.
Caps will keep the ±ttings clean and
help keep sand and grit out when you
lube the block.
You can order protective caps with NSN
Hoist Block Wire Rope
You’ll look at least once, probably
twice, trying to ±nd the wire rope (cable)
for the crane’s hoist. The cable is shown
as Item 89 on Page 340 of TM 5-3810-
307-24P. The NSN is not in the technical
manual, so order NSN 4010-01-477-3812
to get the cable.
Each month, lube fan bearing
and fan belt tightener
Lube
hydraulic
cyclinder
grease
Fttings
Lube steering link bearing
four
grease
fittings on
the crane
get over-
looked
because
they’re on
me
—the
hook
block!
22-Ton Crane…
Hook
Block
News
operators,
here’s some
pm news worth
reading when it
comes to the
crane’s hoist
block.
we
wouldn’t
steer you
wrong!
674.52-53.indd
1-2
11/24/08
3:34:39 PM
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