Actuator Cylinder Lock Installation - Piper Navajo PA-31 Service Manual

1.
CYLINDER
2. STROKE STOP
3. KEY, ROD END LOCK
4. KEY, STROKE STOP LOCK
5.ROD
END
6. LOCK NUT, ROD END
7. LOCK NUT, STROKE STOP
7 6
Figure 7-8. Actuator Cylinder Lock Installation
1.
Ascertain that the actuator cylinder (15) and crank attachment bolt are outboard in the slots of
the attachment fitting (19). This also may be obtained with the actuator (15) attached to the retraction
arm (26) and pressure maintained on the actuator.
m.
Pull the uplock rod or cable (14) out to its full length and adjust the rod or cable end until the
attachment bolt can be freely inserted. Remove bolt, turn rod end out one-half turn and install bolt and
spacer bushing. Tighten locknut on the ends.
n.
Adjust gear actuator rod end (58) until the uplock roller clears inner hook surface by .060 to
0 of an inch when piston is bottomed. Bottom piston with hydraulic pressure. It may require several
adjustments to attain this dimension because of deflection in the linkage.
CAUTION
When installing fork bolt in actuator rod end be sure that the forked
end is properly aligned with the downlock operating rod or cable.
Install the anti-rotation clip. (See Sketch B of Figure 7-7.)
o.
Extend gear and as side braces approach the locked position, exert a side force inboard on the
wheel so that the hydraulic actuator must force the linkage into the locked position. Adjust the stroke
control stop (59) on the lower end of the actuator to stop the piston travel at this point. Repeat several
times to determine that the stroke control is properly adjusted.
p.
Back off stroke stop one-half turn and tighten locknut on stop. (Refer to Figure 7-8.)
CAUTION
Ascertain that all rod ends have sufficient gripping thread by
ascertaining that a wire will not go through the check hole in the
rod.
evised: 3/2/84
LANDING GEAR AND BRAKE SYSTEM
PIPER NAVAJO SERVICE MANUAL
2F11