(g)
Put on the parking brake and check all lines, ensuring no leaks or spongy lines exists.
EFFECTIVITY:
32-40-00
Jan10/90
PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL
B. Brake Assemblies (continued)
Pressure
Bulkhead
Master Cylinder -Support Channel
Push Rod from
Left Rudder Pedal
10-23 Master
Cylinder
Rudder Pedal Bellcrank Assembly
Push Rod to Rudder Cable Control Sector
Master Cylinder Installation
Figure 405 (Sheet 1 of 2)
ReferTo Following
Page For Specific CylinderAssembly Installation
Rudder Pedal Arm Assembly (Pilots Left)
Rudder Pedal
PAGE
1832-40-00
Jan10/90 32-40-00
EFFECTIVITY:
040-999
PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL
B. BrakeAssemblies(continued)
10.63"
Pilot's Right
Brake Cylinder
10.63"
Copilot'sLeft
Brake Cylinder
10.36"
Copilot'sRight
Brake Cylinder
10.11"
Pilot'sLeft
BrakeCylinder
MasterCylinderInstallation
Figure405 (Sheet2 of 2)
EFFECTIVITY: 040-999
32-40-00Jan10/90
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
B. Brake Assemblies (continued)
6.38"
Master Cylinder Assembly Figure 406
12. Inspectionof Brake Master Cylinder
(a)
Inspectinteriorwalls of cylinder for scratches, burrs, corrosion, etc.
(b)
Inspect general condition of cylinder fitting threads.
(c)
Check piston and valve for scratches, burrs, corrosion, etc.
13. Cleaningof Brake Master Cylinder
(a)Cleancylinderparts with a suitable solvent and dry thoroughly.
14. Repair of Brake Master Cylinder
(a)
Repairsto cylinderare limited to polishing outsmallscratches,burrs,etc.
(b)
Replacevalvewashersealand O-rings.
EFFECTIVITY:
040-999
Jan 10/9032 4000
Jan 10/90 32-40-00
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
B. Brake Assemblies (continued)
15. Removal of Parking Brake Valve
(a)
Disconnect parking brake cable from valve actuatingarm.
(b)
Disconnectfluid lines from valve.
(c)
Remove screws attaching valve to its mounting bracket.
(d)
Cap line openings to prevent contamination of system.
16. Disassembly of Parking Brake Valve (refer to 32-40-00 Figure 407)
(a)
Remove two fittings from outside the valve body. A valve spring is held in place by the fittings. Donot loosen these when removing the fittings.
(b)
Fromvalve body, remove the valve spring and valve.
(c)
To remove valve cam, remove the nut, washer, bushing and spring. Pull cam from valve body.
Bushing
Parking Brake Valve Assembly
Figure 407
EFFECTIVITY:
040-999
32-40-00 Jan 10/90
PIPERAIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL
B. BrakeAssemblies(continued)
15. Assemblyof Parking BrakeValve(refer to 32-40-00 Figure407)
(a)
InstallO-ringson valve cam.
(b)
LubricateO-ringswithhydraulicfluid(MIL-H-5606),insertcam into valve body and secure with spring,bushing,washer,andself-lockingnut.
(c)
InstallO-ringonvalve,insert valve in the out porthole, installvalve spring, and secure with outletfitting.
16. Installationof Parking BrakeValve
(a)Attachvalvetobulkheadmountingbracketwithscrews.
(b)Connectfluid lines to valve.
(c) Connectcontrolcableto valvelever. Ensure when valve leverfitsin the closed detent, parkingbrakehandleis 0.062 to 0.125 inchofbeingfullyin against thestop.
(d)Bleedbrakesystem(refer to 32-40-00BleedingProcedure).
17. Inspectionof ParkingBrakeValve
(a)
Inspectcamandseat valve bodysurfacesforexcesswear and corrosion.
(b)
Inspectcamassemblyforburrs,scratches,excesswear,looseoperatinglever,etc.
(c)
Check general conditionof valvesand spring.
18. Cleaningof Parking Brake Valve
(a)Cleanvalvepartswitha suitable solvent.
(b)Dry them thoroughly.
19. Repairof ParkingBrakeValve
Repairto valve is limited to smoothing burredor scratched surfacesand replacing O-rings.
20. BleedingProcedure(referto32-40-00Figure601)
If brake systemhas been drained,hashad parts replaced,orhad had anylineconnectionbroken, bleedit as follows:
(a)
Placea suitable containerat the reservoirto collect fluidoverflow.
