Piper Cherokee LANCE, Service Manual

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PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
03/27/08 II - HANDLING AND SERVICING
1B11
b. If the fastener, screw, or nut is listed in Table II-III, but the mating fastener is not listed, tighten only
to the low end of the torque range specified for the listed fastener. In addition, the following
limitations shall apply:
1. Fastener and nut threads shall be clean and dry (free of lubricants). If the subject
chapter/section requires the fastener and/or nut to be lubricated prior to tightening and does not
specify a torque requirement, use the Table II-III torque range reduced 50 percent.
2. Table II-III, Sheet 1, shall be used for free running nuts, provided minimal friction drag is
determined as specified below.
3. The friction drag torque can be determined as follows: Run the nut down to near contact (but
not in contact) with the bearing surface and check the "friction drag torque" required to turn
the nut.
NOTE: Check the friction drag torque by attaching a scale type torque wrench to the nut and
determining the torque required to turn the nut on the bolt. (Before the nut makes
contact with the bearing surface.)
4. The friction drag torque (if any) shall be added to the desired torque specified in Table II-III,
Sheet 1. This final torque should register on the indicator or be the setting for a snap-over
torque limiting device.
5. Torque requirements do not apply to cross recessed or slotted screws or to fasteners installed
into rivnuts, pressnuts or other nuts not designed to rotate for wrenching at the fastener unless
otherwise specified in the subject chapter/section.
6. Fasteners listed in Table II-III installed into nutplates, and which are accessible to be torqued at
the fastener, must be tightened to the low end of the torque range specified in the appropriate
“shear” column. Torque requirements do not apply if the fastener can not be torqued due to
torque device accessibility.
Torque — Inch-Pounds
Tubing Hose End Fitting
OD and
Inches Aluminum - Alloy Tubing Steel Tubing Hose Assemblies
Minimum Maximum Minimum Maximum Minimum Maximum
1/8 20 30 ——— ——— ——— ———
3/16 30 40 90 100 70 120
1/4 40 65 135 150 100 250
5/16 60 85 180 200 210 420
3/8 75 125 270 300 300 480
1/2 150 250 450 500 500 850
5/8 200 350 650 700 700 1150
3/4 300 500 900 1000 ——— ———
7/8 500 600 1000 1100 ——— ———
1 500 700 1200 1400 ——— ———
1-1/4 600 900 ——— ——— ——— ———
1-1/2 600 900 ——— ——— ——— ———
TABLE II-II. FLARE FITTING TORQUE VALUES
(PIR-AC65-9A.)