5.
Rig cable with valve in closed position. Rig cable so that valve will hit its internal stop without being limited by the console in cockpit. (0.03 to 0.06 inch clearance)
32-30-00 Page 32-68 Revised: December 6, 2002
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
WHEELS AND BRAKES.
MAIN WHEEL.
REMOVAL AND DISASSEMBLY OF MAIN WHEEL. (Refer to Figure 32-16.)
1.
Place the airplane on jacks. (Refer to Chapter 7.)
2.
To remove the main wheel, remove the four cap bolts that join the brake cylinder housing and the lining back plate assemblies. Remove the back plate from between brake disc and wheel.
3.
Remove the dust cover and the cotter pin that safeties the wheel nut, remove the wheel nut and slide the wheel from the axle.
4.
The wheel halves may be separated by first deflating the tire. With the tire sufficiently deflated, remove the wheel through bolts. Pull the wheel halves from the tire by removing the inner half from the tire first, and then the other half.
5.
The wheel bearing assemblies may be removed from each wheel half by first removing the snap rings that secure the grease seal retainers, and then the retainers, grease seals and bearing cones. The bearing cups should not be removed only for replacement and may be removed by tapping out evenly from the inside.
INSPECTION OF MAIN WHEEL.
Inspect brake disc for cracks, excessive wear or scoring, rust, corrosion and warpage. Remove rust and blend out nicks, using fine 400 grit sandpaper. Replace disc if cracked or when disc is worn below minimum thickness. In addition also perform the same inspection given for nose wheel.
32-40-00 Page 32-69 Revised: December 6, 2002
THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
32-40-00 Page 32-70 Revised: December 6, 2002
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THE NEW PIPER AIRCRAFT, INC.
PA-44-180
AIRPLANE MAINTENANCE MANUAL
ASSEMBLY AND INSTALLATION OF MAIN WHEEL. (Refer to Figure 32-16.)
1.
Ascertain that the bearing cup for each wheel is properly installed. Install the tire with tube on the outer wheel half and then join the two wheel halves. Position the brake disc in the inner wheel half and install the through bolts with the nuts on the valve stem side. Torque wheel nuts to 150 inch-pounds.
2.
Position the tire and tube so the index mark on the tire is aligned with the index mark on the tube. This will maintain proper balance of the wheel. Inflate the tire to the specified pressure.
3.
Lubricate the bearing cones and install the cones, grease seals~ seal retainer rings and felt rings. Secure with snap rings.
4.
Slide the wheel on the axle and secure with retainer nut. Tighten the nut to allow no side play. yet allow the wheel to rotate freely. Safety the nut with a cotter pin and install a dust cover.
5.
Position the brake lining back plates between the wheel and brake disc and the brake.cylinder on the torque plate. Install the four bolts to secure the assembly. If the brake line was disconnected, reconnect the line and bleed the brakes.
NOSE WHEEL.
REMOVAL AND DISASSEMBLY OF NOSE WHEEL. (Refer to Figure 32-17.)
1.
Jack the airplane enough to raise the nose wheel clear of the ground. (Refer to Chapter 7.)
2.
Remove wheel by the following procedure:
A. Remove the nut and washer from one end of the axle rod and slide out the rod and axle plugs.
B. Lightly tap the axle tube out from the center of the wheel assembly by use of an object of near equal diameter.
— Note —
Be certain not to damage the axle tube end in any way. This will make removal and installation extremely difficult.
C. Remove the spacer tubes and the wheel assembly.
3.
The wheel halves may be separated by first deflating the tire. With the tire sufficiently deflated, remove the wheel through bolts. Pull the wheel halves from the tire by removing the wheel half opposite the valve stem first and then the other half.
4.
The wheel bearing assemblies may be removed from each wheel half by first removing the snap rings that secures the grease seal retainers and then the retainers, grease seals and bearing cones. The bearing cups should be removed only for replacement, by tappipng out evenly from the inside.
INSPECTION OF NOSE WHEEL.
1.
Visually check all parts for cracks, distortion, defects and excess wear.
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