32-20-00 Page 32-41 Revised: December 6, 2002
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
Item No. Part No. Nomenclature Manufacturers Dimension Service Dimension Service Tol. Remarks
16 67026-007 Bushing, tube assembly, **ID .314 ID .3155 .0025 Press fit.
torquelink fitting .313 .3130 Install using Loctite 601.
17 67148-000 Shimmy damper fitting ID .3745 ID .3745 .0017
.3760 3760
18 21831-004 Bearing, **ID .249 ID .249 .003
Shimmy damper fitting .251 .252
19 20735-005 Torquelink ID .312 ID .312 .002
.313 .314
20 20735-005 Torquelink ID .377 ID .377 .002
.3785 .3790
21 452-366 Bearing, torquelink **ID .2495 ID .2495 .002 Coat bearing
(#F-310-5) .2505 .2515 with zinc chromate and install while still wet. Press fit.
22 67099-000 Strut assembly, ID .4370 ID .4370 .0015
torquelink fitting .4385 .4385
23 67026-007 Bushing, Strut assembly **ID .312 ID .312 .002 Press fit.
torquelink fitting (FF411-4) .313 .314
24 67146-004 Draglink, upper ID .372
.373
25 63900-120 Bushing, upper draglink ID .2495
.2500
**Line ream to this dimension after installation of new part.
Figure 32-7. Nose Gear Service Tolerances (Sheet 3 of 3)
32-20-00 Page 32-42 Revised: December 6, 2002
2H18
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
CLEANING, INSPECTION AND REPAIR OF NOSE LANDING GEAR.
1.
Clean all parts with a suitable dry type cleaning solvent.
2.
Inspect the gear components for the following unfavorable conditions:
A. Bolts, bearings and bushings for excess wear, corrosion and damage.
B. Gear housing, drag links, torque links, and tension spring arm for cracks, bends or misalignment.
C. Downlock hook for excess wear of the hook and bearing surfaces.
D. Downlock roller bearing for freedom of movement and excessive wobble.
3.
Inspect the gear tension and downlock hook springs for the following:
A. Excess wear or corrosion, especially around the hook portion of the springs. A spring should be rejected if wear or corrosion exceeds one-quarter the diameter of the spring. Clean away all corrosion and repaint.
B. Check the gear tension springs for load tensions below minimum allowable tolerances. The minimum allowable tension of the inner spring is 46 pounds pull at 13.75 inches and the outer is 75 pounds pull at 13.75 inches. Measurement is taken from the inner side of each hook. If it is found that either spring should be rejected, replace both springs.
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.
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