leakage. If a place can not be found where there
is coolant leakage, check the accuracy of the light
for water temperature. Remove plug (A) and install
the 9S9102 Thermistor Thermometer Group.
1.
2.
To help prevent an accident caused by parts In
rotation, work carefully around an engine that
has been started.
Start the engine and run it until the temperature
is at the desired range according to the test ther-
mometer. The light for water temperature must go
on if coolant temperature is between 104 and
110°C (200 and 230° F).
Water Temperature Regulator
3.
4.
5.
6.
TM 5-3805-263-14&P-2
Remove the regulator from the engine.
Heat water in a pan until the temperature is
90°C (195°F). This is the correct temperature
for opening the regulator. Move the water
around in the pan to make it all be the same
temperature.
Hang the regulator in the pan of water. The
regulator must be below the surface of the water
and it must be away from the sides and bottom of
the pan.
Keep the water at the correct temperature for 10
minutes.
After ten minutes, remove the regulator and
immediately measure the distance the regulator
has opened. The distance must be a minimum of
9.53 mm (.375 in.).
If the distance is less than 9.53 mm (.375 in.),
make a replacement of the regulator.
WATER TEMPERATURE REGULATOR
Part No.
Minimum
Open Distance
in.
m m
Temperature
°F
°C
7N208
.375
9.53
195°
90°
V-BELT TENSION CHART
WIDTH TOP
BELT TENSION
BELT TENSION
BELT SUE
WIDTH
OF PULLEY
“INITIAL”’
"USED"
BOAROUGHS GAUGE NUMBERS
BELT TOP
GROOVE
GAUGE READING
GAUGE READING
In.
mm
In.
mm
lb.
N
lb.
N
OLD GAUGE NO.
NEW GAUGE NO.
3/8
.422
10.72
.380
9.65
100 ± 5
445 ± 22
90 ± 5
400 ± 22
BT-33-73F
BT-33-95
1/2
.547
13.89
.500
12.70
120 ± 5
534 ± 22
90 ± 10
400 ± 44
BT-33-96-4-16
BT-33-95
5V
.625
15.88
.600
15.24
120 ± 5
534 ± 22
90 ± 10
400 ± 44
BT-33-72-4-15
BT-33-72C
11/16
.688
17.48
.625
15.88
120 ± 5
534 ± 22
90 ± 10
400 ± 44
BT-33-72-4-15
BT-33-72C
3/4
.750
19.05
.690
17.53
120 ± 5
534 ± 22
90 ± 10
400 ± 44
BT-33-72-4-15
BT-33-72C
15/16
.938
23.83
.878
22.30
120 ± 5
534 ± 22
90 ± 10
400 ± 44
BT-33-72-4-15
BT-33-72C
MEASURE TENSION OF BELT FARTHEST FROM THE ENGINE.
*"INITIAL" BELT TENSION is for a new belt.
**"USED" BELT TENSION is for a belt which has more than 30 minutes of operation at rated speed of engine.
A10232X5
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