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 COOLING SYSTEM
TESTING AND ADJUSTING
2.
Heat water in a pan until the temperature is 920C
(1970F). Move the water around in the pan to
make it all the same temperature.
Work carefully around an engine that is running.
Engine parts that are hot, or parts that are
3.
Hang the regulator in the pan of water. The
moving, can cause personal injury.
regulator must be below the surface of the water
and it must be away from the sides and bottom of
the pan.
Start the engine and run it until the temperature
reaches the desired range according to the test
4.
Keep the water at the correct temperature for 10
thermometer. If necessary, put a cover over part of the
minutes.
radiator or cause a restriction of the coolant flow. The
reading on the gauge for water temperature should
5.
After ten minutes, remove the regulator and
agree with test thermometer within the tolerance range of
immediately measure the distance the regulator
the gauge. Make reference to SPECIFICATIONS or
has opened. The distance must be a minimum of
ATTACHMENT SPECIFICATIONS in this manual to find
9.53 mm (.375 in.).
correct range for a specific gauge.
6.
If the distance is less than 9.53 mm (.375 in.),
Water Temperature Regulator Test.
make a replacement of the regulator.
1.
Remove the regulator from the engine.
V-BELT TENSION CHART
WIDTH TOP
BELT TENSION
BELT TENSION
BELT
WIDTH
OF PULLEY
"INITIAL"
"USED"**
SIZE
BELT TOP
GROOVE
BORROUGHS GAUGE
GAUGE READING
GAUGE READING
NUMBERS
mm
in.
mm
in.
N
lb.
N
lb.
OLD GAUGE NO. NEW GAUGE
NO.
3/8
10.72 .422 9.65
.380 445 + 22
100 + 5
400 + 22 90 + 5
BT-33-73F
BT-33-95
1/2
13.89 .547 12.70 .500 534 + 22
120 + 5
400 + 44 90 + 10
BT-33-96-4-16
BT-33-95
5V
15.88 .625 15.24 .600 534 + 22
120 + 5
400 + 44 90 + 10
BT-33-72-4-15
BT-33-72C
11/16
17.48 .688 15.88 .625 534 + 22
120 + 5
400 + 44 90 + 10
BT-33-72-4-15
BT-33-72C
3/4
19.05 .750 17.53 .690 534 + 22
120 + 5
400 + 44 90 10
BT-33-72-4-15
BT-33-72C
15/16
23.83 .938 22.30 .878 534 + 22
120 + 5
400 + 44 90 + 10
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. A10232-1X1
144
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