(g)
Lubricateentiregland and slide it onto plunger with recessed end on outside.
(h)
Lubricatepump body bore and slide plunger and gland into pump body.
(i)
Install scraper onto gland recess by sliding scraper over plunger with tapered lip of scraper facingoutward.
(j)
Attachbracketto pump body with four screws. Torque to 70 inch-pounds.
(k)
Positionlink and Install quick click pin.
(I)
LubricateO-ring and install on seat.
(m)Install spring, ball, and lubricatedseatinto pump body suction port. Secure with snap ring.
73.Cleaning, Inspection, and Repair of Hand Pump.
(a)
Cleanpump parts with suitable solvent and dry thoroughly.
(b)
Inspectplunger for enlarged pinholes and inspect surface area for scratches, burrs, etc, which coulddamageO-ring.
(c)
Inspect check balls and seats for damaged seatingareas and corrosion.
(d)
Check general conditionof all other parts.
(e)
Repairstopumpare limited to polishingoutsmallscratches,burrs,etc. ReplacewornO-rings anddamagedparts.
74. Installationof Hand Pump.
(a)
Positionhandpumpon mounting bracketand secure withbolts.
(b)
Connect hydraulic pressureand suction lines to forward end of pump.
(c)
Bleed hand pump and test hand pump operation.
(d)
Installaccesspanel.
(e)
Ensure reservoir is filled with hydraulic fluid.
75. Bleeding Hand Pump.
Purge hand pumpby operating pumpuntil all air is expelled from pump. Thisusually requires approximately15 pump cycles.
EFFECTIVITY:
040-999
29-10-00Jan10/90
PIPERAIRCRAFT
PA42-720 (Advanced Trainer)
MAINTENANCEMANUAL
A. Main (continued)
76. HandPumpTest.
(a)
Ensurereservoirisfilledwithhydraulicfluid.
(b)
Removecap from door-openport. Operateemergencyhandpump until fluidflowsfromportwithnoevidenceof airin system. Replenishreservoirwithcleanhydraulicfluid.
(c)
Removefittingandinstall 2100 psigaugeat door-open port.
(d)
Operateemergencyhandpumpveryslowly until pressureongaugestopsincreasing,indicatinghandpump relief valvehasopened.
CAUTION: WHENBLEEDINGHANDPUMPRELIEFVALVE,HANDPUMPMUSTBE OPERATEDVERYSLOWLYAS PRESSURE IS INCREASED. IF OPERATED RAPIDLY,DAMAGETO VALVE CANOCCUR,AS AIR WILLSLAM PARTS
AGAINSTEACHOTHER.
(e)
Ensuremaximumgaugecomplieswiththosein29-00-00,Chart2. Duringpumpingoperation, emergencyhandpumpmustnotfeel spongy duringupor down stroke.
(f)
Crackgaugeindoor-openport to releasepressure;removegauge.Reinstallfitting at door-
openport.
NOTE:Aftercompletingtest, reinstall lineandcheckreservoirfluidlevel.
7.GT-Ring 12 NutSafety
8. O-Ring 13.BackUp Wire 1.RodEnd
9.BackUp \ 14.O-Ring
2.Locknut 5. Safety Wire 10 Nut 15.Race
4. EndCap 6. Piston 16. Ball
3. GT-Ring 17. Plunger
GearDoorActuatingCylinder
Figure 412
EFFECTIVITY:
PAGE36Jan 10/90 29-10-00 040-999
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
A. Main (continued)
6. Rod End
-1. Cylinder Body Safety Wire 6. Back Up —-7.EndCap
-3. GT-Ring 8. GT-Ring
Gear Actuating Cylinder (Nose Gear)
Figure 413
EFFECTIVITY:
040-999
PAGE37
29-10-00 Jan 10/90
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
CHAPTER 30
LIST OF EFFECTIVE PAGES
CHAPTER CHAPTER
SECTION PAGE DATE SECTION PAGE DATE
30-EFFECTIVITY 1 Feb 1/98 30-60-00 1 Jan 10/90
30-CONTENTS 1 Jan 10/90 30-60-00 2 Jan 10/90
30-CONTENTS 2 Jan 10/90 30-60-00 3 Jan 10/90
30-CONTENTS 3 Jan 10/90 30-60-00 4 Jan 10/90
30-10-00 1 Jan 10/90 30-60-00 5 Jan 10/90
30-10-00 2 Jan 10/90 30-60-00 6 Jan 10/90
30-10-00 3 Jan 10/90 30-60-00 7 Jan 10/90
30-10-00 4 Jan 10/90 30-60-00 8 Jan 10/90
30-10-00 5 Jan 10/90 30-60-00 9 Jan 10/90
30-10-00 6 Jan 10/90 30-60-00 10 Jan 10/90
30-10-00 7 Jan 10/90 30-60-00 11 Jan 10/90
30-10-00 8 Jan 10/90 30-60-00 12 Jan 10/90
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本文链接地址：夏延飞机维护手册 Cheyenne IIIA PA-42-720 AMM 2(9)
