IF INSTALLED
Nose Landing Gear and Doors - Component Index
Figure 101
32-20-00
ALL ú
ú 02 Page 101
ú May 28/00
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FAULT ISOLATION/MAINT MANUAL
LOCK SPRINGS
AFT LOCK LINK
UPPER DRAG
STRUT
FORWARD LOCK LINK SHOCK STRUT
TRUNNION PIN (ONE EACH SIDE) LOWER DRAG STRUT ASSEMBLY FOR THE WHEEL AND TIRE
UPPER TORSION A
LINK
LOWER
TORSION
LINK
A
AFT TOW
FITTING
FWD
1 FORWARD TOW FWD
FITTING
NOSE LANDING GEAR
ACTIVE DYNAMIC SEAL OUTER CYLINDER (REF) ACTIVE STATIC SEAL
SPARE SEALS
1 IF INSTALLED INNER (REF) CYLINDER
GLAND NUT (REF)
SHOCK STRUT SEALS FOR THE NOSE LANDING GEAR A-ANose landing Gear and Doors - Component Location Figure 102 (Sheet 1)
L25034
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757 FAULT ISOLATION/MAINT MANUAL
AFT DOOR
SEE B
MECHANISM TO OPERATE THE FORWARD DOOR
FORWARD DOOR
SEE A
MECHANISM TO OPERATE
THE AFT DOOR (THE RIGHT
MECHANISM IS SHOWN, THE LEFT
DOOR IS ALMOST THE SAME)
FORWARD DOOR
A
SHOCK STRUT FOR THE
NOSE LANDING GEAR
FWD (REF)
AFT DOOR
(THE RIGHT DOOR IS
SHOWN, THE LEFT DOOR
IS ALMOST THE SAME) B
Nose Landing Gear and Doors - Component Location
Figure 102 (Sheet 2)
32-20-00
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MAINTENANCE MANUAL
NOSE GEAR - DESCRIPTION AND OPERATION
_____________________________________
1. General (Fig. 1)
_______
A. The nose gear provides directional control and supports the forward end of the airplane while on the ground. The nose gear consists of a shock strut, drag strut, lock link, lock springs, torsion link, and tow fitting.
2. Component Details
_________________
A. Drag Strut (Fig. 1)
__________
(1)
The drag strut carries forward and aft loads and stabilizes the shock strut. The drag strut is hinged in the middle and consists of an upper and a lower strut. The upper strut attaches to the wheel well side walls and the lower strut attaches to the shock strut outer cylinder. During retraction the drag strut folds in the middle.
B.
Lock Link (Fig. 1)
_________
(1)
The lock link consists of a forward lock link, and an aft lock link. The forward end connects at the hinge point of the drag strut and the aft end attaches to the wheel well aft wall. The links lock in an overcenter position to keep the nose gear extended or retracted until the lock actuator (Ref 32-34-00) unlocks it.
C.
Lock Spring (Fig. 1)
___________
(1)
The lock springs attach to the aft lock link and to the forward lock link. The springs keep the lock link in the overcenter position until the lock actuator supplies a force to stretch the springs out of the locked position.
D.
Shock Strut (Fig. 2)
___________
(1)
The nose gear shock strut is the main supporting member of the nose gear. The shock strut consists of an inner cylinder and an outer cylinder. The outer cylinder is connected to the wheel well side walls with trunnion pins and the inner cylinder slides within the outer cylinder.
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