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 TM 9-2320-312-24-2
Testing and Adjusting Section
i01660532
Belt Tension Chart
SMCS Code: 1357
Note: Do not use the belt tension charts for belts
with tensioners that are spring loaded.
Table 27
Belt Tension Chart
Kent-Moore Gauge
Gauge Reading
Numbers
Size
Width of Belt
of
Number
Number of
Belt Tension
Belt Tension
Belt
of the Old
the New
"Initial"(1)
"Used"(2)(3)
Gauge
Gauge
3/8
10.72 mm (0.422 inch)
534 111 N (120 25 lb)
400 22 N (90 5 lb)
BT-33-97
BT 3397
1/2
13.89 mm (0.547 Inch)
578 111 N (130 25 lb)
445 44 N (100 10 lb)
BT-33-97
BT 3397
5V
15.88 mm (0.626 Inch)
712 111 N (160 25 lb)
445 44 N (100 10 lb)
BT-33-72C
BT 3372C
11/16
17.48 mm (0.688 Inch)
712 111 N (160 25 lb)
445 44 N (100 10 lb)
BT-33-72C
BT 3372C
3/4
19.05 mm (0.750 Inch)
712 111 N (160 25 lb)
445 44 N (100 10 lb)
BT-33-72C
BT 3372C
15/16
23.83 mm (0.938 Inch)
712 111 N (160 25 lb)
445 44 N (100 10 lb)
BT-33-77
BT 3372C
8PK
27.82 mm (1.095 inch)
1068 111 N (240 25 lb)
890 44 N (200 10 lb)
BT-33-109
BT 33109
6PK
20.94 mm (0.824 Inch)
801 111 N (180 25 lb)
667 44 N (150 10 lb)
BT-33-109
BT 33109
Measure the tension of the belt that is farthest from the engine.
(1)
Belt tension "Initial" is for a new belt.
(2)
Belt tension "Used" is for a belt that has operated for 30 minutes or more of operation at the rated speed.
(3)
If a belt falls below the "Used" belt tension, the belt should be tightened again to the high side of the "Used" belt tension.
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