Quantcast TABLE 1: SPECIAL TORQUE LIMITS

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TM 9-2815-220-24
TORQUE LIMIT TABLES
0174 00
GENERAL (Continued)
F.F.F.T. Torque Method
The abbreviation F.F.F.T. (Flats From Finger Tight) is occasionally used prior to the torque
column in the Special Torque Table. This method is used to tighten certain fittings, hose nuts,
and tube nuts when a torque wrench is not available. The F.F.F.T. value is in parentheses
followed by the proper torque value. Use the torque value whenever possible and verify the
F.F.F.T. value at the earliest opportunity if it is used.
The following steps explain this method:
1. Verify size.
2. Install and finger tighten (approximately 30 inch-pounds, or 3.39 Nm). Make sure
fastener is seated. This is the starting point for counting the flats on the nut/fitting and
equals zero (0) F.F.F.T.
2. Mark flat of nut/fitting and body of mating part with one continuous line using ink-type
marker.
3. Apply torque in accordance with the value stated. As an example, a tube with an outside
diameter of 1/8-inch requires 2 F.F.F.T. Tighten the tube nut two flats beyond the mark.
This would be equivalent to 75-110 inch-pounds (8.47-12.43 Nm) using a torque wrench.
4. Verify torque using torque wrench at earliest opportunity.
TABLE 1: SPECIAL TORQUE LIMITS
NOTE
Use Lubriplate (item 23, WP 0173) as a thread lubricant (except when
noted otherwise). Avoid excessive amounts of lubricant in blind
tapped holes.
DESCRIPTION
Torque: inch-pounds
Accessory cam drive inner gear shaft (1-7/8-18 plug)
1300-1400
Accessory drive gear to crankshaft (7/16-20 bolts)
400-450
Accessory drive housing and fan tower to bases (3/8-24 nuts)
275-300
Accessory drive housing fan tower base to crankcase (3/8-24 nut and screws)
275-300
Camshaft drive bevel gear and oil return cover to camshaft (3/8-24 bolts)
275-325
Clamps, E-type hose (all) (Lubrication Note number 4 applies)
30-40
WP 0174 00-2

 


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