(b)
Inspectthreaded areas for damage.
(c)
Inspectrod end fittings for wear and corrosion.
EFFECTIVITY:
32-30-00 PAGE
Jan10/909
Cylinder Body
GT-Ring
Main Gear ActuatingCylinder
Figure 401
EFFECTIVITY:
040-999
PAGE10 32-30-00
Jan10/90
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
A. ExtensionandRetraction(continued)
12. CleaningofMainGearActuatingCylinders
(a) Cleancylinderpartswitha suitablesolventanddrythoroughly.
13.
RepairofMainGearActuatingCylinders
Repairstocylinderarelimitedto polishingoutsmallscratches,burrs,replacingparts,etc.
14.
RemovalofNoseGearActuatingCylinders
(a)
Placeairplaneon jacks. (Referto 7-10-00.)
(b)
Disconnecthydrauliclinesfromactuatingcylinder. Coveropenlineendsto prevent contamination.
(c)
Disconnectcylinderoperatingrodend fromlink assembly.
(d)
Disconnectattachmentendof cylinderby removingthe boltsecuringthe cylinderand nose gearup lock rod.
(e)
Removecylinderfromwheelwell.
15. DisassemblyofNoseGearActuatingCylinders(referto32-30-00Figure402)
(a)
Beforedisassembly,establishrodend engagementdistanceto aidin preliminaryassemblyof actuatingcylinder.
(b)
Loosennutto disengagekey. Removerodend.
(c)
Cutsafetywire and remove. Removenut,key,andstopfrom piston.
(d)
Removesafetywire and endcapfromcylinderbodybyunthreadingendcapand pullingout the piston.
(e)
Slideend capfrom piston.
16. Assemblyof NoseGearActuatingCylinders (referto 32-30-00 Figure402)
Lubricateall partswith hydraulicfluid (MIL-H-5606)priorto assembly.
(a)
InstallGT-ringonthepistonhead.
(b)
InstallbackupandO-ringintooutsidegrooveofendcap.
(c)
InstallGT-ringandscraperintoinsidegroovesofendcap. Taperlipofscrapertofaceforward.
(d)Lubricatethepistonassembly,endcapassembly,andtheboreofcylinderbody.
(e)Slideendcapassemblyontothepistonassembly.
(f)
Slidepistonwithendcapintocylinder,torquingendcapto 65inch-pounds.Securetocylinder bodyusingsafetywire.
(g)
Installstopandnutwithkeyonpiston.
(h)
Installrodendwithnutandkeyintopiston.
(i)
Adjuststopforproperpistonstroke,torquingnutto 65inch-pounds.Securebywiringnutto keywithsafetywire.
(j)
Adjustrodendto lengthobtainedbeforedisassembly.RefertoAdjustmentof NoseLanding Gearforfinaladjustments.Engagekeyandtorquenutto85 inch-pounds.
EFFECTIVITY:
32-30-00Jan
10/90
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCE MANUAL
A. ExtensionandRetraction(continued)
CylinderBody
Piston
O-Ring
BackUp
End Cap
GT-Ring
Scrapper
stop
Nut Key
Safety Wire
Key
Rod End
NoseGear Actuating Cylinder
Figure 402
EFFECTIVITY:
040-999
PAGE1232-30-00
Jan 10/90
PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCEMANUAL
A. Extensionand Retraction (continued)
17. Installationof Nose Gear Actuating Cylinder
(a) Positionattachmentend of cylinder and up lock rod end of nose gear on mounting bracket. Install attachment bolt and secure.
(b)Connectoperatingrodend of cylinder to gear link assembly.
(c) Connecthydrauliclines to cylinder.
(d)Check operation of installation and landing gear rigging.
(e) Removeairplanefrom jacks.
18. Inspectionof Nose Gear Actuating Cylinder
(a)
Inspectcylinder interior walls and piston exterior surfaces for scratches, burrs,corrosion,etc.
(b)
Inspectthreadedareasfor damage.
(c)
Inspectrod end fitting for wear and corrosion.
19.Cleaningof Nose Gear Actuating Cylinder
(a)Clean cylinder parts with a suitable solvent and dry thoroughly.
20.
Repair of Nose Gear Actuating Cylinder
Repairsto cylinder is limited to polishing outsmall scratches, burrs,etc, and replacing parts.
21.
Removalof Gear Door Actuating Cylinders
(a)With master switch off, actuate hand pump handle to bring gear door open.
(b)
Disconnecthydrauliclines from actuating cylinder.Cover open line ends to prevent contamination.
(c)
Disconnectcylinder from the door and its mounting bracket.
(d)
Removecylinder from wheel well.
22. Disassembly
of Gear Door Actuating Cylinders (refer to 32-30-00 Figure 403)
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