PS Magazine - TB 43-PS-593
PS, The Preventative Maintenance Monthly
ISSUE 593
APRIL 2002
Snug Filler Plug
Vehicle vibration loosens the plug in
the transmission’s oil filler tube. Once
loosened, the plug can fall off. A missing
plug means dirt, dust and water can get
into the dozer’s transmission.
So before the day’s run, make sure the
plug is snug. Never stuff a rag or anything
else in the filler tube if the plug is missing.
Instead, have your mechanic replace the
plug with NSN 4730-01-249-8409. It’s
Item 7 in Fig 82 of TM 5-2410-237-24P.
Before Shifting
Every time you shift in or out of reverse without reducing engine speed you put
unnecessary strain on your dozer’s transmission. That’s bound to shorten its life.
1.
While your dozer’s still on the
move, push down the decelerator
pedal. That slows engine speed
without changing the governor con-
trol setting.
2.
Stop your dozer dead in its tracks.
3.
Shift in or out of reverse.
4.
Ease up on the decelerator pedal
to speed up the engine until it reach-
es the governor control setting.
PS 593
APR 02
20
Keep Breather Valve Clean
A plugged breather valve is a death sentence for the dozer’s transmission. It’s
often forgotten because it’s located under the operator’s seat. Two things happen
when the transmission’s breather valve gets clogged and both are bad.
•
Pressure builds in the transmission and causes seals to blow. When the seals go,
lube goes, too. No lube means friction and gear damage.
•
Pressure build-up also creates a vacuum in the transmission. That causes the
transmission to stall or lock up—you can’t move!
So keep the breather valve
clean. It’s simple to do. Just tap
on the valve with your finger to
loosen any dirt stuck inside. If
the valve won’t go down or it
won’t come back up if it does go
down,
have your mechanic
replace the valve, NSN 2520-01-
164-0077. It’s Item 9 in Fig 83
of TM 5-2410-237-24P.
Keeping your D7G’s
transmission in top
shape for a day’s
dirt-moving means
shifting your PM
into
high gear.
I lost my
plug…
and
I- I can’t
breathe!
this never
would’ve
happened if
I’d done
PM!
After you’ve
done your
PMCS according
to TM
5-2410-237-10,
heed this
additional PM.
Here’s
how to
change
that tune:
Tap
breather
valve to
loosen
dirt
A missing plug means dirt,
dust and water can get into
dozer’s transmission
Decelerate to shift
into or out of reverse
D7G Tractors…
593. 20-21 (C)
3/1/02
3:47 PM
Page 1
Back to TopBack to Top
