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( Book 35386598,
8/92)
4.7
PREVENTIVE MAINTENANCE
It is recommended
to test the freezing
protection
of the coolant
every
six
months or prior to freezing tempera-
tures.
Replenish with a fresh mixture
every twelve months. A drain for the
system is located in the bottom radiator
tank. An alternate method would be to
disconnect a bottom radiator hose.
Each month, inspect the radiator exte-
rior for obstructions (dirt, bugs, etc.). If
present, blow water or compressed air
containing a nonflammable solvent
be-
tween the fins in a direction opposite
the normal air flow. Should the radiator
be clogged intemally,
standard
auto-
motive practices should be followed.
HOSES
Each month it is recommended
that all of
the intake lines to and from the air clean-
ers, the engine cooling system
hoses
and all of the flexible hoses used for air,
oil, and fuel be inspected.
To ensure freedom from air leaks, all rub-
ber hose joints and the screw-type
hose
clamps must be absolutely tight. Regu-
lar inspection of these connections
for
wear or deterioration
is a definite "must"
if regulator servicing of the air cleaners is
not to prove futile.
Premature wear of
both the engine and compressor
is AS-
SURED whenever dusHaden
air is per-
mitted to enter the engine's combustion
chamber or the compressor intake prac-
tically unfiltered.
The flexible hoses used in the fuef,
oil and air Jines on these units are
primarily used for their ability to ac-
commodate relative movement be-
tween components.
It is extremely
important
they
be
periodically
in-
spected for wear and deterioration.
Clamps are used to prevent hose
cover abrasion;
they should be
tight anjd,
if
rnlssinq, replaced.
NOTICE
Piping systems operating at
less than 150 psi (1050 kPa)
may use a special nylon tub-
ing. The associated fittings
are also of a special "push-:
in" design. If so, features are
as follows:
Pulling on the tubing
wflf
cause the inner sleeve to
withdraw
and
compress,
thus tightening the connec-
tion. The tubing can be with-
drawn only while holding the
sleeve against the fitting.
The tubing can be removed
and
replaced
numerous
times without losing its seal-
ing ability.
To install the nylon tubing,
make a mark (with tape or
grease pencil) approximate-
ly
7/8
inch from the end of
the tubing.
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