Piper Arrow IV, Maintenance Manual

Page: 388 / 752

C. Check the gear downlock hook spring for load tension below minimum allowable tolerance. The
minimum tension of the spring is 10.5 pounds pull at 4.5 inches. Measurement is also taken from
the inner side of each hook.
4. Check the general condition of each limit switch and its actuator, and wiring for fraying, poor
connections or conditions that may lead to failures.
5. Check drag link through center travel by attaching the upper and lower drag links, setting them on a
surface table, and ascertaining that when the stop surfaces of the two links touch, linkage is not less than .062
to .125 nor more than .125 to .250 of an inch through center. Should the distance exceed the required through
center travel and bolt and bushing are tight, replace one or both drag links.
6. The shimmy dampener requires no service other than routine inspection. In case of damage or
malfunction, the dampener should be replaced rather than repaired.
7. Repair to the landing gear is limited to reconditioning of parts such as replacing bearings and
bushings, smoothing out minor nicks and scratches, repainting of areas where paint has chipped or peeled and
replacement of parts.
INSTALLATION OF NOSE LANDING GEAR. (Refer to Figure 32-5.)
—NOTE—
When assembling any units of the landing gear; lubricate
bearings, bushings, and friction surfaces with the proper
lubricant as described in Chapter 12.
1. Attach the steering bellcrank with bushing to its mounting plate on the engine mount securing with the
bolt assembly. Align the steering bellcrank and the steering arm bushings by positioning the spacer washers as
noted in remova1. Connect the bungee assembly to the bellcrank and install bolt and nut assemblies. The
adjustment, fore and aft of the bellcrank, may be made after the gear has been installed and rigged and
adjusted.
2. To install the gear housing assembly, position the gear so that the bolt attachment points on the
housing align with the attachment points on the engine mount. Install pivot bolts, washers and nuts. Tighten
the nuts to a snug fit, yet allowing the gear to swing free, and safety.
3. The drag links and gear tension spring arm may be installed by the following procedure:
A. Ascertain that the upper and lower links are assembled with the downlock hook attached, and the
through travel of the links checked according to Cleaning, Inspection and Repair of Nose Landing
Gear.
B. Position the link assembly to allow the bolt holes in the links to align with the bolt holes in the
gear housing and the engine mount. Install the link attachment bolts.
C. Install nuts and washers on the upper link attachment bolts. Tighten the nuts to allow the links to
rotate freely and safety.
D. Check alignment of the downlock hook to determine if it grips the roller bearing so as not to
contact the bolt head, the bearing attachment block or washer. If the downlock hook is inboard, or
it contacts the bolt head, shim between the bearing and the bearing attachment block with washer
AN960-10L, not to exceed three. The bearing must be free to rotate.
E. Install the gear tension spring arm on the drag link bolt on the right side of the gear oleo housing,
secure and safety. A washer is installed on the bolt between the lower drag link and the arm.
4. Retract and extend the landing gear several times to ascertain smoothness of operation. Also check that
the drag link assembly falls into the through center-locked position.
5. Retract the gear and connect the gear downlock spring between the downlock hook and the upper drag
link.
32-20-06
Page 32-30
December 1, 1978
2E13
PIPER AIRCRAFT
PA-28RT-201 / 201T
MAINTENANCE MANUAL