PS Magazine - TB 43-PS-589
PS, The Preventative Maintenance Monthly
ISSUE 589
DECEMBER 2001
PS 589
DEC 01
23
22-Ton Crane…
c
ool nights and warm days cause condensation to
form in the 22-ton crane’s fuel tank. That means
you operators have to drain the fuel/water separa-
tor before each day’s operation.
Not draining the separator will leave water and
crud in the vehicle’s fuel system. Then the engine
runs rough…or not at all.
Open the separator—located behind the curb-
side engine access door—by turning its drain cock
counterclockwise. Store drained fuel in an
approved hazardous waste container. Never dump
it down a drain or let it run on the ground from the
separator’s drain hose.
If the fuel is clear, you’re OK. If the fuel doesn’t
run clear after you’ve drained half a pint or so,
close the valve and report it to your mechanic.
Also, make sure your mechanic replaces the fuel
filter at semiannual service time.
Centershift Pin Needs Exercise
T
he 130G grader’s centershift guide pin
rusts in place when the vehicle sits too long
without exercise.
When that happens, you can’t move the
pin in and out of the centershift hole to posi-
tion the grader’s blade. Your grader’s sloping
operations just came to a screeching halt!
It just can’t be said often enough—exer-
cise your grader! Pull the centershift pin
from the centershift hole
at least once a
week.
That way rust won’t “freeze” the pin
in place.
Pages 2-8 and 2-9 of TM 5-3805-261-10
have the lowdown on the centershift pin.
SEE…
T
he excavator’s front and rear driveshaft torsion boots are out of sight—under the
vehicle—protecting the driveshaft’s U-joints.
Over time, dry rot weakens the boots. Add to that a beating the boots take during
off-road use. Rocks, brush and dirt tear and rip the rubber.
Once the boots tear, U-joints are
exposed to dirt and water. That causes ‘em
to rust. Driveshaft failure is the end result.
So you operators need to crawl under
the vehicle and eyeball the boots for tears,
cracks and loose clamps. Do this once a
month.
Report any problems to your mechanic.
W
hile doing the before-operation PMCS on your small emplacement excavator,
you get no instrument readings on the vehicle’s dash. You try the windshield wipers
and turn signals.
..nothing seems to work.
What gives?
The first thing to check is the fuse
panel under the excavator’s hood.
Vibration may have loosened the panel. A
loose panel shakes fuses loose. That stops
current flow to wipers, turn signals and
the dash, among other places.
Stamp out loose fuses by tightening the
fuse panel’s mounting screws. That keeps
the panel and fuses from shaking loose.
Without weekly exercise, rust will
“freeze” centershift pin in place
Drain fuel/water
separator before
operation
Tighten fuse panel
mounting screws
Eyeball torsion boot
for oil drips, tears,
cracks, or loose clamp
Cure for a Loose Fuse
130G Grader…
589. 22-23 (C)
10/26/01
11:10 AM
Page 1
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