757
MAINTENANCE MANUAL
SELF LOCKING NUT SELF LOCKING NUT
COTTER PIN COTTER PIN
INSTALL THIS
END FIRST
LOCK RING LOCK RING
NUT HOLE
SHAFT SHAFT
NUT BEFORE INSTALLATION AFTER INSTALLATION
Locking Pins - Installation
Figure 403
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-10-23
ALL ú ú 01 Page 405 ú Mar 20/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
S 424-004
(2) To install lockwires on electrical connectors, see Fig. 402.
NOTE: Specifications for the installation of lockwires to bolt and
____ screws are also applicable to electrical connectors.
S 424-005
(3) To install cotter pins, see Fig. 403.
(a)
To install cotter pins in castellated nuts, install the head of the cotter pin parallel to the slot in the nut. Bend the ends of the cotter pin to the bolt end or to the castellated nuts slit next to the pin end.
(b)
To install cotter pins and washers on clevis pins, put the pin through the hole on the bolt and bend the pin ends around the side of the bolt.
(c)
To install cotter pins in non-castellated nuts, install the cotter pin through the hole on the bolt and bend the pin ends back on each side of the bolt approximately 90 degrees.
S 424-006
(4) To install lock rings, see Fig. 403.
(a)
Put the bent hook of the lock ring into an aligned locking hole in the shaft and nut. Do not let the ring move apart.
(b)
Move the lock ring over the flange into the groove with minimum expansion of the lock ring.
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A
757 MAINTENANCE MANUAL
RIG PINS - MAINTENANCE PRACTICES
________________________________
1. General
_______
A. This procedure contains a list of rig pins used for maintenance on the
757. The list gives the Maintenance Manual (MM) rig pin number and rig pin size (diameter and length). Each MM rig pin number has a letter prefix:
A = Aileron AT = Autothrottle CD = Cargo Doors, Lower Lobe E/ST = Elevator and Stabilizer LDG = Landing Gear LE = Leading Edge Slats LGB = Landing Gear Brakes LGD = Landing Gear Doors NS = Nose Steering PD = Passenger Doors R = Rudder RR = RR Engine TE = Trailing Edge Flap TR = Thrust Reverser
B. The B20003-91 Rig Pin set incorporates and replaces the -83 and -84 rig pin sets.
NOTE: The -83 and -84 rig pin sets are applicable until replacement is
____ necessary.
TASK 20-10-24-992-001
2. Table - Rig Pins
________________
A. General ~.............................................................................. | | Rig Pin Size | | Rig Pin Set B20003-91 ....................................... | | Diameter | Length | ................................................................................ | MM Rig Pin No. | Rig Pin P/N | +0.00/-0.002 in. | |0.01 in. | ................................................................................
| A 1 | B20003-27 | 0.311 | 11.00 |
| A 2 | B20003-25 | 0.311 | 10.00 |
| A 3 | B20003-23 | 0.311 | 7.00 |
| A 4 | B20003-23 | 0.311 | 7.00 |
| AT 1 | B20003-67 | 0.311 | 10.00 |
| CD 1 | B20003-12 | 0.311 | 1.50 |
| E/ST 1 | B20003-21 | 0.311 | 6.00 |
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