Piper Navajo PA-31 Service Manual page 352

PIPER NAVAJO SERVICE MANUAL
6-100. INSPECTION OF LANDING GEAR SELECTOR HANDLE MECHANISM.
a.
Ascertain that the handle does not contact the ends of the slot in the instrument panel when
actuated to the extremes of its travel.
b. Inspect and be certain of adequate clearance between the landing gear selector lever mechanism
and wiring harness which runs laterally across the aircraft.
c.
Ascertain that there are sufficient clearances between the control rod and alternate air control
cable and the control rod and manifold pressure lines.
d. Determine that there is adequate clearance between the lateral channel section which supports
the hydraulic brake lines, etc., and the control rod.
e.
Maintain positive clearance between the control rod and hole through the bulkhead at station 81.
f. Be sure there is no interference between the rubber boot and boot retainer, with the control rod.
g. Check security of control mechanism connections to the actuator arms on both the Power Pack
and selector handle and at pivot connections between these locations.
6-101. ADJUSTMENT OF GEAR SELECTOR MECHANISM. (Refer to Figure 6-24.)
a. Ascertain that the selector arm on the lever assembly is safety wired. (Refer to Figure 6-24.)
b.
The short rod (7) attached to the selector handle (6) mechanism directly forward of the
instrument panel is adjusted to allow the centerline of both the selector arm (6) and torque tube arm (8) to
align parallel.
c. The long rod (11) between the torque tube and the control arm (12) on the right side of the
Power Pack (14) is adjusted to allow the selector handle (1) to position itself midway between the up and
down position when the arm (12) on the Power Pack (14) is at neutral.
d.
Depress the button on the solenoid lock to allow the handle to travel freely between the two
neutral positions.
e. To check the handle-release mechanism, disconnect the control rod from the arm at the Power
Pack. Connect a spring scale to the arm and pull both fore and aft, perpendicular to the centerline of the
arm, to determine that it will leave the detent at a force of 9 +1 -2 pounds. If it does not release at the
required force, adjust the mechanism in accordance with instructions given in Paragraph 6-46 for Ozone
units or Paragraph 6-87 for Wiebel Tool units.
f. Recheck that the handle will leave the detent at 3-1/2 to 6 pounds.
6-102. REMOVAL OF GEAR SELECTOR HANDLE MECHANISM. (Refer to Figure 6-25.) Removal of
the gear selector mechanism can be divided into three individual assemblies: The Solenoid Assembly, The
Selector Handle Assembly, and The Flexible Cable Assembly.
a. Removal of Solenoid Assembly:
1. Disconnect the two wires leading from the solenoid (13).
2. Remove two locknuts securing the solenoid to the mounting block (14) and remove the
solenoid.
b.
Removal of Selector Handle Assembly:
1. Remove stop pin (3) and pull the control knob (1) and sleeve (2) from the lever assembly
(6).
2.
Disconnect the wires leading from the panel assembly (15). Remove four light assemblies
(16) securing the panel assembly to the plate assembly (5).
3. Remove pin, washer and cotter pin (12) securing the terminal (18) to the lever assembly.
4. Remove the selector assembly from the instrument panel.
c.
Removal of Flexible Cable Assembly:
1. Remove screws and clamp (19) securing cable assembly (7) to bracket assembly (8).
2. Push cable assembly through grommet adjacent to the bracket assembly.
Reissued: 10/12/79
HYDRAULIC SYSTEM
2C22