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22
PERIODIC MAINTENANCE
6. Drive platform hinge pin inboard to 
correct position through the platform 
hinge bracket (FIG. 22-1). Line up 
the hole in the platform hinge pin with 
the hole in the pin collar. Reinstall 
cap screw through the pin collar and 
secure with fl at washer and locknut 
(FIG. 22-1).
REPLACING PLATFORM TORSION SPRING - Continued
PIN
COLLAR
FIG. 22-1
CAP
SCREW
FLAT 
WASHER
LOCK 
NUT
PLATFORM HINGE 
BRACKET
PLATFORM 
HINGE PIN