(g)The fork tube components are removed by reaching in the tube and pushing out the upper bearing retaining pins. Slide off the upper bearing, spacer, lower bearing with O-rings or dynamic seal and wiper, washer, and retainer ring.
(h)To remove orifice tube from the oleo housing, cut safety wire and remove cap bolt and washer from top of housing.
(i) The orifice plate is removed from the orifice tube by releasing the retainer ring holding the plate in position.
10.Assemblyof Main Gear Oleo (refer to 32-10-00 Figure 402)
(a) Ensure all parts are cleaned and inspected.
(b)To assemble and install the orifice tube, insert orifice plate into the bottom of the tube, with countersunkside of the orifice hole exposed. Secure plate with retainer ring. Lubricate and install O-ring on the upper end of the tube and insert tube up through the bottom oleo housing.
(c) The piston tube assembly is assembled to the oleo housing by installing tube components on the tube. Slide the retainer ring, washer, lower bearing with inner and outer O-rings, spacer, and upper bearing onto the tube. Align lockpinholesof the upper bearing and tube; install retainer pins.
NOTE: Refer to parts catalog for correct part number when replacing O-ringsand wiper strip.
EFFECTIVITY:
040-999
PAG
10/9032-10-00
Jan 10/90
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
A. Main Gear and Doors (continued)
1 2
1.
Bolt,OrificeTube
2.
Washer
3.
O-Ring, Packing
4.
Tube,Orifice
5.
Plate,Orifice
6.
Ring,Retainer
7.
Pin,Retainer 19
8.
Bearing,Upper
9.
Spacer
10.
O-Ring Gasket
11.
Bearing,Lower 36
12.
O-Ring, Packing
13.
WiperStrip 39
14.
Washer
15.
Ring,Retainer
16.
O-Ring,Packing
17.
Plug
18.
GreaseFitting
19.
Valve,Air
20.
Plug,Filler
21.
Housing,Oleo 33 34
22.
Tube, Piston 35
23.
BoltAssembly
24.
Fork
25.
Pin,Cotter
Main Gear Oleo Strut Assembly Figure 402 (Sheet 1 of 2)
EFFECTIVITY:
040-999
32-10-00Jan
an 10/90
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. MainGearand Doors (continued)
7
NOTE: Refer to previous pagefor callouts.
VIEW A
MainGearOleoStrutAssembly
Figure402 (Sheet 2 of 2)
EFFECTIVITY:
040-999
Jan10/9032-10-00
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
A. MainGearand Doors (continued)
10. Assemblyof Main GearOleo (refer to 32-10-00 Figure 402) (continued)
(d)
Carefullyinsertpistontube assembly intothe oleo housing, guiding the orificetube into the pistontube, until retainer ringcanbe installed in the annular slotat the lowerend of the housing. Installwiperstrip,slide washerinto position and secureassemblywith retainerring.At the top of the housing, tightencapbolt.
(e)
Installupperand lower torquelinks. (Usesamethicknessspacerwashersbetweenthe two linksremoved,to maintaincorrectwheelalignment.)
(f)
Lubricategearassembly. (referto 12-20-00Chart2.)
(g)
Serviceoleostrutwith fluid and air (refer to 12-10-00, OleoStruts)and safety with MS20995C40wire betweenfiller plug andcapbolt.
(h)
Check gear alignmentand gear operation.
11. Inspectionof Main GearOleo
(a) Inspectthe landing gearoleo assembly componentforthe following:
(1.) Bearingsand bushingsfor excesswear,corrosion,scratches,andoverall damage.
(2.) Retainingpinsfor wear anddamage.
(3.) Lockringsfor cracks, burrs, etc.
(4.) Cylinder,cylindersteel insert, and orificetubefor corrosion,scratches,nicks,andexcess
wear.
(5.) Orifice plate for hole restriction.
(6.) Forktube for corrosion, scratches,nicks,dents,and misalignment.
(7.) Air valve for generalcondition.
12.
Cleaningof Main Gear Oleo
Cleanall parts with a suitable dry typecleaningsolvent.
13.
Repairof Main GearOleo
(a)
Repairof the oleo is limited to smoothing outminorscratches,nicksand dents and replacementof parts.
(b)
Individualreplacementof wiper strips is possible.
14. Removalof Main Gear DoorAssembly
(a)
To remove the outboard gear door,disconnectthe retraction rods from the door and removethe hingebolts.
(b)
Toremovethe inboardgeardoor, place theairplaneon jacks,retract the gearenoughto allow thedoorto open, disconnectthe actuating cylinderrod, and removehingebolts.
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