This work package lists standard torque values, as shown in Table 1, and provides general information for applying
torque. Special torque values and tightening sequences are indicated in the maintenance procedures for applicable com-
Air conditioner refrigerant line torque specifications are provided in Table 2.
Always use the torque values listed in Table 1 when the maintenance procedure does not give a specific torque value.
Unless otherwise indicated, standard torque tolerance shall be 10%.
Torque values listed are based on clean, dry threads. Reduce torque by 10% when engine oil is used as a lubricant.
Reduce torque by 20% if new plated cap screws are used.
Cap screws threaded into aluminum may require reductions in torque of 30% or more of Grade 5 cap screw torque. Cap
screw threaded into aluminum must also attain two cap screw diameters of thread engagement.
If the maintenance procedures do not specify a tightening order, use the following guides:
Unless otherwise specified, lubricate threads of fasteners with oil (OE/HDO-10 or OEA).
When tightening fasteners above 30 lb-ft (41 Nm), use the torque pattern but only tighten to 70 percent of final
value (multiply final value by 0.7); then repeat the pattern until final value is reached.
Tighten circular patterns using the circular torque pattern, and straight patterns using the straight torque pattern.
If replacement cap screws are of higher grade than originally supplied, use torque specifications for the orig-
inal. This will prevent equipment damage due to overtorquing.