Piper COMANCHE PA-24-180 Service Manual page 232

PIPER COMANCHE SERVICE MANUAL
6-52. Adjustment Of Landing Gear Safety Switch.
.
The landing gear safety switch iocated on the left main ger is adjusted so the witch is actuated in
the last 0.75 of an inch of gear extension.
b.
The switch with the boot seal and adjusting rod (refer to Figure 6-9, Sketch B) is adjusted by
placing the gear in full down position and the stru fully extended. Screw the acctuator arm (41) down until
the switch dicks on, then screw down an additional 0.187 of an inch and secure with jam nut (40).
c.
The round switch used on aircraft without the adjusting rod and arm is adjusted by compressing
the strut until 5.5 inches is obtained between the top of the gear fork (34) and bottom of the gear housing
(15), then adjust the switch down until it contacts the strker plate. Secure the switch and safety.
d.
Ascertain that either switch will actuate in the last 0.75 of an inch of oleo extension.
6-53. Adjustment Of The Ger Down Limit Switch.
a.
Before attempting any adjustment of the down limit switch ascertain that the nose and main gear
drag link assemblies are properly adjusted. Refer to paragraph 6-15 and 6-34.
b.
Each main gear down limit switch attached to the side brace drag link assembly is adjusted by
moving the switch toward or away from the striker plate. When the landing gear is down and locked, the
limit switch should have broken contact.
c.
The nose gear down limit switch located at the left drag link is adjusted by moving it toward or
away from the striker plate. When the gear is down and locked, the switch should have broken contact.
d.
Check operation of the down limit switches by the following procedure:
1. Open landing gear retraction motor circuit breaker.
2. Turn on the master switch.
3. Disconnect the retraction transmission by pulling up on the release lever and manually
retracting the landing gear using the emergency extension lever.
4. At the point where the green light goes out, apply rearward pressure on the nose gear and
inward pressure on the main gear. The gear should not unlock.
6-54 Adjustment Of Gear' Retraction Transmission Assembly. (Refer to Figure 6-14.) Adjust the
retraction transmission by using the following procedure:
a.
Release the retraction transmission by pulling up on the emergency release lever.
b. Adjust the push-pull cables so the cable (1) from the right gear has three threads exposed forward
of the castellated nut and the cable (2) from the left gear has one thread exposed forward of the castellated
nut. (A spanner wrench may be fabricated to tighten the casrellated nuts. See Figure 6-40.)
NOTE
The main gear push-pull cables cross each other aft of the retraction
transmission.
LANDING GEAR AND BRAKE SYSTEM
ISSUED: 8/18/72
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