PS Magazine - TB 43-PS-675
PS, The Preventative Maintenance Monthly
ISSUE 675
FEBRUARY 2009
54
PS 675
FEB 09
55
PS 675
FEB 09
When you depress the valve, you’re letting the vehicle’s hydraulic pump spin free
with no pressure, which reduces the load on the engine starter. This procedure saves
a lot of wear and tear on the starter and pump when the hydraulic fluid gets thick and
sluggish during cold weather.
As the engine warms up,
do not take your foot off the
valve too fast. That forces
too much pressure from the
pump into the system’s main
hydraulic
lines.
The
end
result is blown seals with lots
of leaks.
Paint Shop Reminder
Before your dozer heads off to the paint shop, tape over the throttle linkage where it
connects into the mounting bracket. That way the linkage won’t get stuck “in place.”
Just make sure the tape is removed when the dozer comes back from the paint shop.
To
prevent
these
problems, wipe off the
throttle linkage with
a brush or clean rag.
Then spray pivot points
and connections with
a shot of lubricating
spray, NSN 9150-00-
458-0075. Move the
throttle
lever
back
and forth a few times
to work it in.
Make sure to spray the linkage at
every scheduled service. Lube puts the
slide and glide back into the linkage for
smooth operation of the throttle.
D7G Tractor…
Stuck Lever Linkage Reminder
130G
Road
Grader…
Use Hydraulic Unloading
Valve in the Cold
the linkage for the
governor control
lever (throttle)
gets corroded
from moisture.
over time, enough
corrosion or rust
causes the lever
to be sluggish to
push or pull or
not move at all.
a stuck
lever isn’t
much good
when you
need to
increase or
decrease
engine
speed
during
operations.
Spray lube here…
…and here
it’s this
throttle
lever
--
it won’t
budge!
what’s
wrong?!
operators, when temps
drop below 60°f, use the
hydraulic unloading valve
when starting the 130g
road grader’s engine.
it’s located by
your left foot
when you’re
sitting in the
driver’s seat.
so,
ease off
the hydraulic
loading valve
when using it.
also, do
not
push down on
the valve during
operations.
that also causes
unnecessary
wear and tear
on the grader’s
hydraulic system.
use me when the
temperature drops
below
60°f!
Let your foot off unloading valve
slowly
675.54-55.indd
1-2
12/24/08
9:23:49 AM
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