PS Magazine - TB 43-PS-629

PS, The Preventative Maintenance Monthly

ISSUE 629

APRIL 2005
PS Magazine - TB 43-PS-629 - Page 6 of 33
T
here are two reasons why those floor-mounted windshield washer bottles blow
their tops.
1.
You could be using a control valve other
2.
You could have the hoses connected wrong.
Either way, there’s too much pressure on the
bottle and a washer fluid fountain is the result.
Replace the control valve if it is not the one
called for in your parts TM. The control valve
that was used when the washer bottle was
mounted above the passenger seat gives it too
much pressure.
Then make sure the air hose is connected to the VAL port and the water hose is
connected to the NOZ port. That will keep the system pushing windshield fluid out
onto the windshield, not out the top of the bottle. Consider labeling the hoses so re-
connecting them is a cinch.
Check valve
and hose
connections
A
dust cap that’s missing from an air brake chamber is an open door for sand, sand
and more sand.
Shut the door by making sure all brake chambers on your air brake-equipped
trucks and trailers have dust caps.
Keep this list handy for dust cap NSNs:
NSN
Trailers
M870A1
M871-series
M872/A1/A2
M872A3
M967/M969/M970
M967A1/M969A1/
M970A1
M1000
M1076
PS 629
APR 05
9
Wheeled Vehicles, Trailers…
Dust Cap NSNs
NSN
Trucks
FMTV
M939-series
HEMTT
M915-series,
tandem axle
M915A1-series,
front axle
tandem axle
M1070
M1074/1075
c’mon, guys!
this missing air
brake chamber
dust cap is
our
opening
to cause
trouble!!
let’s
do it!!
Use duct
tape to cover
the hole
until you get
a replace-
ment cap.
PS 629
APR 05
8
HEMTT…
why is
smith
blowing
his top?
because the
windshield washer
bottle on his
hemTT keeps
blowing
its
top!
Air hose
Water hose
Notice a
dust cap
missing
from
your vehicle’s
air brake
chamber?
629.08-09(C)
2/25/05
1:30 PM
Page 1
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