Inspection Of Nose Wheel Assembly; Assembly And Installation Of Nose Wheel Assembly; Brake Adjustment And Lining Tolerance; Removal And Disassembly Of Brake Assembly - Piper Dakota Maintenance Manual

INSPECTION OF NOSE WHEEL ASSEMBLY

1. Visually check all parts for cracks, distortion, defects, and excess wear.
2. Check tie bolts for looseness or failure.
3. Check internal diameter of felt grease seals. Replace felt grease seal if surface is hard or gritty.
4. Check tire for cuts, internal bruises, and deterioration.
5. Check bearing cones and cups for wear and pitting and relubricate.
6. Replace any wheel casting having visible cracks.
ASSEMBLY AND INSTALLATION OF NOSE WHEEL ASSEMBLY (figure 32-8)
1. Ensure that bearing cup for each wheel half is properly installed. Install tire with tube on wheel half
with valve stem hole. Join two wheel halves. Install through bolts with washers and nuts to valve stem
side, tighten nuts to a torque of 150 inch-pounds and inflate tire. (Refer to chart 601.)
2. Lubricate bearing cones and install cones and grease seal assembly. Secure with retainer rings or snap
rings.
3. Replace wheel fairing by turning sideways and slipping it up over fork assembly.
4. Place spacer tubes one on each side of wheel and install unit in fork. Align and slide axle tube through
spacer tubes and wheel assembly. Install axle plugs and rod with washer and nut. Tighten nuts until no
side play is felt, yet allow wheel to rotate freely.
5. Turn fairing so it will fall into place and reinstall it with four bolts and screws in small plate.
BRAKE ASSEMBLY

BRAKE ADJUSTMENT AND LINING TOLERANCE

No adjustment of the brake lining clearance is necessary as they are self-adjusting. Lining inspection is
necessary, and may be done while installed on the airplane. The linings should be replaced if the thickness of
any one segment becomes worn below 0.099 of an inch or unevenly worn.
REMOVAL AND DISASSEMBLY OF BRAKE ASSEMBLY (figures 32-9 and 39-10)
1. Disconnect brake line from brake cylinder at tube fitting.
2. Remove two cap bolts that join brake cylinder housing and lining back plate assembly. Remove back
plate from between brake disc and wheel.
3. Slide brake cylinder housing from torque plate.
4. Remove pressure plate by sliding it off anchor bolts of housing.
5. Remove piston(s) by injecting low air pressure in cylinder fluid inlet and forcing piston from housing.
6. Check anchor bolt for wear.
7. Remove anchor bolt as follows:
a. Position cylinder assembly on a holding fixture. (Refer to figure 32-11.)
b. Use a suitable arbor press to remove anchor bolt from cylinder body.
8. Install anchor bolt as follows:
a. Support anchor bolt in a holding fixture. (Refer to figure 32-11, step A.)
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
2C7
32 - 43 - 00
Page - 32-19
Reissued: August 1, 1986