BELT
ADJUSTMENT
ImEIl:MOSTAT
I.
Loosen bolt
at
genera-
lor slotted bracket.
2.
Pull
generator
away
from engine until
de·
sired bell tension
is
ob.-
tained.
\Vith
correct
adjustment
a light pres-
sure on
th
e bell
at
a
point midway between
pulleys should cause a
7/16'
to
~'
deflection
(fig.
71).
3.
Tighten
all
generator
bolts secuTely.
thermostat consists
of
a restriction valve actuated
by
a
tbenn,,.,,,ti'c clement. This unit
is
mounted in the housing
the
cylinder head
water
outlet above the
water
pump.
are designed
to
open and close at predetcr.
temperatures
and
if not
operating
properly
may
abnormally high
or
abnormally
low engine tempera-
If
the condition of the thennostat
is
questioned,
it
be
removed
and
tested as follows:
Open radi
ator
drain
cock apd
drain
out
about
half the
coolant to
bring
the
coolant
level below
the
thermostat,
then
close
the
drain
cock.
2. Remove the two cap screws
that
attach the water
oul.
let
to
th
e thermostat housing (fig. 72)
and
lift
water
out-
let (with hose
attached),
gasket,
and
thermootat from
housing.
3.
Heat a container
of
water to a temperature 25°
abov~
the
temperature
stamped
on
the
thermostat
and
place
thermostat
in
the
water
and
sec if it opens fully.
If
it
does
not
fully open, it should
be
replaced.
4.
Place
thermostat
in
water
10
0
below tbe
temperature
stamped
on the thermostat and
see if thermootat fully
closes.
If
it
does
not
fully close, it should
be
replaced.
5.
Place
thermostat
in
bowin
g, then using a
new
gaske
t,
install
water outlet
and
cap
screws. Tighten
SCrews
Fig
.
72-
Thdmrulal Housm, evenJy and securely.
6.
Fill cooling system
and
check it for
lcab.
49