WHEELS 1. DESCRIPTION A.

Transcription

1 WHEELS 1. DESCRIPTION A. Main Wheels Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X-32-21: The main wheels are of aluminum construction and designed to be used with tires and tubes. The 15 x 6.00 x 6 wheels use 6-ply-rated tube tires and rotate on two bearings protected against contamination by grease seals. The wheel is secured to the axle with a nut, and cotter pin. Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs: The main wheels are of aluminum construction and designed to be used with tires. The 15 x 6.00 x 6 wheels use 10-ply-rated tires and rotate on two sealed bearings. The wheel is secured to the axle with a nut, and cotter pin. For disassembly/assembly of main wheels refer to the manufacturer s approved Instructions For Continued Airworthiness. B. Nose Wheel Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X-32-21: The nose wheel is of aluminum construction and designed to be used with tires and tubes. The 5.00 x 5 wheels use a 6-ply-rated tube tire and rotate on two bearings protected against contamination by grease seals. The wheel is free castering on an independent axle and is used to steer the airplane on the ground by means differential brake application. Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs: The nose wheel is of aluminum construction and designed to be used with tires. The 5.00 x 5 wheels use a 10-ply-rated tire and rotate on two sealed bearings. The wheel is free castering on an independent axle and is used to steer the airplane on the ground by means differential brake application. For disassembly/assembly of nose wheel refer to the manufacturer s approved Instructions For Continued Airworthiness. All Page 1

2 2. TROUBLESHOOTING Trouble Probable Cause Remedy Cracked or distorted wheel or wheel half. Hitting rocks or other hard objects during landing or takeoff. Use of sharp objects to break tire bead. Landing with flat tire or abnormally hard landing. Landing in crabbing position in crosswind causing excessive side force. Normal fatigue failure when used beyond expected wheel life. Inspect wheel using Zyglo to determine condition. Replace wheel or wheel half. CAUTION: Do not attempt to weld or repair cracks in wheel halves. Replace wheel or wheel half. Replace wheel or wheel half. Replace wheel or wheel half. Replace wheel or wheel half. Damaged bearing cone. Misalignment of bearings. Replace bearing cone being sure it is properly seated in bearing bore. Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs: Rapid decrease of tire pressure (10 PSI per day) Axle nut improperly torqued. Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X-32-21: Foreign matter in bearing grease. Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X-32-21: Lack of bearing grease. Improper tire mounting and/or damaged seal. Leak at valve core. Replace and torque axle nut. Check grease seals for damage. Replace seals and be sure bearing grease is free from foreign matter. Replace bearings and repack with grease per manufacturer s instructions. (Refer to 05-10) Disassemble and replace seals. Replace valve core. Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs: Medium decrease of tire pressure (10 PSI per week) Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs: Slow decrease of tire pressure (10 PSI per month) Page 2 Improper tire. Scratches on sealing faces. Defective valve core. Standard decrease of pressure with some tubeless tires. All Use only tubeless tires. Replace damaged parts. Replace valve core. Inflate tire to appropriate pressure. Check inflation pressure every month.

3 3. MAINTENANCE PRACTICES A. Servicing Tires and Tubes (Refer to 12-10) B. Main Wheel, Tire, and Tube - Serials thru before SB2X-32-21, 22T-0001 thru 22T before SB2X (See Figure 1) (1) Removal - Main Wheel, Tire, and Tube (a) Remove main gear fairings. (Refer to 32-10) (b) Raise airplane on jacks. (Refer to 07-10) (c) Remove brake assembly. (Refer to 32-42) (d) Deflate tire and tube completely. WARNING: Do not attempt to remove valve core until tire has been completely deflated. The valve core will be ejected at high velocities if unscrewed before air pressure has been released. (e) Remove valve core. (f) Remove cotter pin from axle and remove axle nut. (g) Remove wheel/tire assembly from axle. (2) Installation - Main Wheel, Tire, and Tube CAUTION: Do not use degreaser, abrasive cleaner, or pressure washer. (a) (b) (c) (d) (e) Clean and inspect wheel bearings per manufacturer s instructions. (Refer to 05-10) If damage is present, contact Cirrus for disposition. Lightly lubricate wheel bearings and seals with Mobil SHC-100 or Aeroshell 22 grease per manufacturer s instructions. (Refer to 05-10) Carefully slide wheel/tire assembly onto axle making sure inboard bearing is seated. While rotating wheel/tire assembly, install axle nut and torque to 200 in-lb (22.6 Nm) to seat bearing. Back off axle nut to zero torque. Note: Wheel to spin 1-2 rotations when spun by hand. Additional washers may be required to meet torque and fit-up requirements. (f) While rotating wheel, retorque to in-lb ( Nm). (g) Rotate axle nut to nearest slot and cotter pin hole, and install cotter pin. (h) Install brake assembly. (Refer to 32-42) (i) Inflate tires. (Refer to 12-10) (j) Remove airplane from jacks. (Refer to 07-10) (k) Install main gear fairings. (Refer to 32-10) All Page 3

4 C. Main Wheel and Tire - Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs (See Figure 1) (1) Removal - Main Wheel and Tire (a) Remove main gear fairings. (Refer to 32-10) (b) Raise airplane on jacks. (Refer to 07-10) (c) Remove cotter pin from axle and remove axle nut. (d) Remove wheel/tire assembly from axle. (2) Installation - Main Wheel and Tire (a) Carefully slide wheel/tire assembly onto axle making sure inboard bearing is seated. (b) Torque to 350 in-lb (39.5 Nm). (c) Rotate axle nut to nearest slot and cotter pin hole, and install cotter pin. (d) Check main wheel pressure. (Refer to 12-10) (e) Remove airplane from jacks. (Refer to 07-10) (f) Install main gear fairings. (Refer to 32-10) Page 4 Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs

5 STRUT ASSEMBLY (REF) 2 3 A B BRAKE ASSEMBLY (REF) 4 WHEEL FAIRING BRACKET (REF) DETAIL Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X A LEGEND 1. Axle 2. Bolt 3. Washer 4. Wheel Assembly 5. Axle Spacer 6. Cotter Pin 7. Axle Nut 8. Wheel Fairing Mount SR22_MM32_1388C Figure 1 Main Wheel Installation - Serials before SB2X-32-21, 22T T-0689 before SB2X (1 of 2) Serials before SB2X-32-21, 22T T-0689 before SB2X Page 5

6 STRUT ASSEMBLY (REF) BRAKE ASSEMBLY (REF) WHEEL FAIRING BRACKET (REF) DETAIL B LEGEND 1. Axle 4. Wheel Assembly 6. Cotter Pin 7. Axle Nut 9. Safety Wire Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs. SR22_MM32_3618 Figure 1 Main Wheel Installation - Serials & subs, 22T-0689 & subs, serials after SB2X (Sheet 2 of 2) Page 6 Serials & subs, 22T-0689 & subs, serials after SB2X-32-21

7 D. Nose Wheel, Tire, and Tube - Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X (See Figure 2) (1) Removal - Nose Wheel, Tire, and Tube (a) Remove nose gear fairings. (Refer to 32-20) (b) Raise airplane on jacks. (Refer to 07-10) (c) Deflate tire completely. WARNING: Do not attempt to remove valve core until tire has been completely deflated. Valve core will be ejected at high velocities if unscrewed before air pressure has been released. (d) (e) (f) Remove valve core. While supporting wheel/tire assembly, remove axle plugs, cotter pin, axle nut, washers, and withdraw bolt from axle. Pull tire, axle, and wheel from fork. Note: Label bearings with position from which it was removed for proper reinstallation. (g) Remove and store spacers and axle before disassembling wheel. (2) Installation - Nose Wheel, Tire, and Tube CAUTION: Do not use degreaser, abrasive cleaner, or pressure washer. (a) (b) (c) (d) (e) (f) (g) Clean and inspect wheel bearings per manufacturer s instructions. (Refer to 05-10) If damage is present, contact Cirrus for disposition. Lightly lubricate wheel bearings and seals with Mobil SHC-100 or Aeroshell 22 grease per manufacturer s instructions. (Refer to 05-10) Insert axle and spacers into wheel and tire. Position wheel into fork so that valve stem is on left side of airplane and install washers, axle bolt, and nut. Torque axle nut to 200 in-lb (22.6 Nm) to seat bearing. Back off axle nut to zero torque. Retorque axle nut to in-lb ( Nm) and install cotter pin. Note: Wheel to spin 1-2 rotations when spun by hand. Additional washers may be required to meet torque and fit-up requirements. (h) Inflate tire. (Refer to 12-10) (i) Remove airplane from jacks. (Refer to 07-10) (j) Install nose gear fairing. (Refer to 32-20) Serials thru before SB2X-32-21, 22T thru 22T-0689 before SB2X Page 7

8 E. Nose Wheel and Tire - Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs (See Figure 2) (1) Removal - Nose Wheel and Tire (a) Remove nose gear fairings. (Refer to 32-20) (b) Raise airplane on jacks. (Refer to 07-10) (c) While supporting wheel/tire assembly, remove cotter pin, axle nut, washers, and withdraw bolt from axle. (d) Pull wheel, axle, and axle spacer from fork. (e) Remove and store spacer and axle before disassembling wheel per manufacturer s instructions. (2) Installation - Nose Wheel and Tire (a) Insert bearing spacer into wheel. (b) Position wheel into fork so that valve stem is on LH side of airplane and install washers, axle bolt, and nut so that nut is on LH side of airplane. (c) Torque axle nut to 150 in-lb (17 Nm), then further torque as required to align nut with first available cotter pin slot and install cotter pin. (d) Check nose wheel pressure. (Refer to 12-10) (e) Remove airplane from jacks. (Refer to 07-10) (f) Install nose gear fairing. (Refer to 32-20) Page 8 Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs

9 A B 6 7 TIRE & WHEEL (REF) DETAIL A LEGEND 1. Cotter Pin 2. Nut 3. Washer 4. Nose Gear Fork 5. Axle Bolt 6. Plug 7. Spacer 8. Axle Serials thru before SB2X-32-21, 22T-0001 thru 22T-0689 before SB2X SR22_MM32_1390A Figure 2 Nose Wheel Installation - Serials before SB2X-32-21, 22T T-0689 before SB2X (1 of 2) Serials before SB2X-32-21, 22T T-0689 before SB2X Page 9

10 TIRE & WHEEL (REF) DETAIL Serials thru after SB2X-32-21, & subs, Serials 22T-0001 thru 22T-0689 after SB2X-32-21, 22T-0690 & subs. B 7 LEGEND 1. Cotter Pin 2. Nut 3. Washer 4. Nose Gear Fork 5. Axle Bolt 7. Spacer 8. Axle SR22_MM32_3616 Figure 2 Nose Wheel Installation - Serials & subs, 22T-0689 & subs, serials after SB2X (Sheet 2 of 2) Page 10 Serials & subs, 22T-0689 & subs, serials after SB2X-32-21