Removal Of Nose Gear Door Assembly; Installation Of Nose Gear Door Assembly; Adjustment Of Nose Gear Door; Disassembly Of Main Gear Oleo - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
NOTE
Due to the nature of the design of the unit, the damper must be
bled to allow the piston rod assembly to be fully retracted.
9. Remove unit from vise. Loosen screw approximately 2 1/2 to 3 turns. Grasp cylinder body
with hand and compress piston rod assembly to the fully retracted position. When piston contacts end cap
(fully retracted), snug screw against end cap. Excess fluid should be cleaned off unit and clamp assembly
installed and torqued to 45 to 50 in-lbs.
NOTE:
Unit should be hand stroked 5 complete strokes to check for any
leakage of O-rings. Install on aircraft in reverse order that unit
was removed.
7-14. REMOVAL OF NOSE GEAR DOOR ASSEMBLY.
a. To remove the gear door, disconnect the retraction rod at the door and remove the hinge bolts at
each side of the wheel well.
b. To remove the door retraction mechanism, ascertain that the retraction rod is disconnected, discon-
nect the down lock spring and remove the snap ring that holds the retraction mechanism on its support shaft.
Pull the retraction mechanism from the shaft.
b. To remove the door retraction mechanism, ascertain that the retraction rod is disconnected, discon-
nect the down lock spring and remove the snap ring that holds the retraction mechanism on its support shaft.
Pull the retraction mechanism from the shaft.
7-15.CLEANING, INSPECTION AND REPAIR OF NOSE GEAR DOOR ASSEMBLY.
a. Clean all parts with a suitable cleaning solvent.
b. Inspect the door for cracks or bent skin, loose hinge brackets and worn or corroded bearings.
c. Check the retraction mechanism for worn down lock spring and worn or damaged surfaces.
d. Repair to the door assembly is limited to replacing hinge bearings or rivets and mechanism parts,
minor skin repairs and repainting.
7-16. INSTALLATION OF NOSE GEAR DOOR ASSEMBLY
a. To install the door retraction mechanism, position and bolt the unit in place and connect the down
lock spring.
b. The gear door is installed by aligning the bracket bolt hole with the hinge, installing bolt assembly
and securing. Attach and secure retraction rod.
7-17. ADJUSTMENT OF NOSE GEAR DOOR.
a Ascertain that the nose landing gear has been properly adjusted.
b. With gear up and locked, close one door at a time and adjust door operating rods until bolts can be
freely inserted. Shorten rods one full turn of rod end bearings. Do not install bolts.
c. Extend gear and install door operating rod bolts. Adjust "door open" stop bolts to allow door linkage
to pass .06 to .12 inches through center.
d. Retract gear slowly and observe that all parts are operating satisfactorily.
e. If gear fails to remain retracted after cockpit handle returns to neutral, it will be necessary to read-
just either or both of the following items until gear will lock up.
1. Increase actuator stroke by turning out stroke control stop.
2. Relieve door "pinch" by lengthening door operating rods.
7-18. MAIN LANDING GEAR SYSTEM.
7-19. DISASSEMBLY OF MAIN GEAR OLEO. ( Refer to Figure 7-8.) The main gear oleo assembly may
be removed and disassembled from the gear oleo housing with the gear removed from or installed on the airplane.
Revised: 3/31/94
LANDING GEAR AND BRAKE SYSTEM
2E7