JUL 2020 Chapter 20 Standard Practices Page 20.11B
20-34 Push-Pull Tube Rod End Adjustment
NOTE
Refer to § 18-13 to adjust C258 main rotor pitch links.
The following procedure is standard for adjusting push-pull tube rod ends:
1. Loosen palnut and jam nut on rod end shank.
2. Remove hardware securing push-pull tube rod end to attachment point per respective
instructions.
3. Screw rod end in or out of push-pull tube as required to obtain proper rigging
adjustment. Apply B270-21 (corrosion) protectant to exposed threads.
4. After any rod end adjustment, verify rod end threaded shank blocks passage of 0.020-
inch diameter wire thru the witness hole in the push-pull tube per Figure 5-1. When
no witness hole is provided, refer to Figure 5-1 for maximum rod end extension.
5. Install fastener securing push-pull tube to attachment point per respective instructions.
6. Refer to Figure 5-2. Position rod ends to allow as much push-pull tube rotation as
possible without binding. Standard torque jam nuts & palnuts per § 20-32 & torque
stripe per Figure 5-1.
20-35 D210-series Nuts on Critical Fasteners
When performing maintenance that involves disassembly of a critical fastener (joints with
a secondary lock), reassemble the fastener using a D210-series nut.
If a fastener is disassembled that has an MS21042L-series or NAS1291-series nut with
a B330-series palnut or B332-series lockwasher (secondary lock),
replace MS21042L08 nut or NAS1291-08 nut with D210-08 nut,
replace MS21042L3 nut or NAS1291-3 nut with D210-3 nut,
replace MS21042L4 nut or NAS1291-4 nut with D210-4 nut,
replace MS21042L5 nut or NAS1291-5 nut with D210-5 nut,
replace MS21042L6 nut or NAS1291-6 nut with D210-6 nut,
replace NAS1291-7 nut with D210-7 nut,
replace NAS1291-8 nut with D210-8 nut, or
replace NAS1291-10 nut with D210-10 nut.
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