PS Magazine - TB 43-PS-626
PS, The Preventative Maintenance Monthly
ISSUE 626
JANUARY 2005
O
perators, don’t skip the lube for these two grease fittings. They usually get over-
looked during scheduled services.
Sprocket Bearings
The dozer’s drive sprocket bearings take the brunt while working in sand and mud.
Sand and water get past the seals and into the
bearings. That combo causes corrosion and grinds
the bearing’s polished surfaces. Those worn bear-
ings let the dozer’s track get out of alignment,
causing excessive wear and tear on the vehicle’s
undercarriage components.
To head off problems, lube the bearings every
time you finish a day’s run in sand, mud or water.
With a hand grease gun, give the sprocket’s fitting
four or five shots of grease.
Fan Pulley Bearings
The fan pulley’s grease fitting is hidden
behind the fan blades. That means it’s out
of sight unless you hop up on the track,
reach in, and find it.
Without lube, the bearings seize up.
Then the blade stops turning freely, let-
ting the engine and transmission overheat.
Keep the fan pulley bearing lubed.
During scheduled services, give the fitting
four to five pumps of grease.
O
perators, here are some quick pointers that will link you up to the right PM on
the dozer’s throttle linkage.
A Stuck Lever
Moisture and mud corrode the linkage for the governor control lever (throttle).
Enough corrosion causes the lever to push or pull sluggishly, erratically or not at all.
A stuck lever isn’t much good when you need to increase or decrease engine speed
during construction operations.
Wipe off the dozer’s throttle
with a brush or clean rag. Then
spray a shot of lubricating
spray, NSN 9150-00-458-0075.
Work the throttle lever back and
forth a few times.
Make sure to spray the link-
age at every scheduled service.
Lube puts the slide and glide
back into the linkage for smooth
operation.
No Step Here
The throttle linkage looks like a convenient footrest while working on the engine.
Problem is, all that weight will
bend the linkage and its swivel arms.
The end result is erratic move-
ment—not good! If you see wear
marks on the linkage, it’s the tell-tale
sign that someone’s boot was there.
So keep your boot off the linkage
when cleaning or doing maintenance
or a PMCS check.
PS 626
JAN 05
47
D7G Tractors…
Fittings Need Lube
D7G Tractors…
PM Link for Linkage
Spray lube here…
…and here
Pump grease in here
Lube fan pulley bearings
here are
two
lube spots
ya
don’t
wanna miss!
uh-oh!
this
linkage looks
corroded!
so, how
can I
prevent
that?
ouch!
you’re
breaking
my back!!
626.46-47(C!)
11/26/04
12:32 PM
Page 1
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