CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

MAIN LANDING GEAR 1. DESCRIPTION Serials 1005 thru 1885: A rugged, maintenance free fiberglass strut assembly is utilized for the main landing gear. The strut attaches to the airplane via a canted wing rib and an upper attach fitting that bolts to the WS 37 rib. The wheel, brake, axle, tire, tube (Serials 1005 thru 1885 before SB2X-32-21), wheel bearing, and attaching hardware is mounted on each main gear. Serials 1886 & subs: A rugged, maintenance free fiberglass strut assembly is utilized for the main landing gear. The strut attaches to the airplane via an upper attach fitting, a lower attach fitting, and two aluminum ribs installed laterally between the WS 27 and WS 37 ribs. The lower attach fitting bolts through the lower wing skin to the WS 37 and lateral ribs, and the upper attach fitting bolts to the WS27 and lateral ribs. The wheel, brake, axle, tire, tube (Serials 1886 thru 2240 before SB2X-32-21), wheel bearing, and attaching hardware are mounted on each main gear.

EFFECTIVITY: All

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Page 1 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

2. TROUBLESHOOTING TROUBLE Airplane leans to one side.

Tires wear excessively.

Obvious vibration on smooth surface.

32-10

Page 2 15 Jun 2010

PROBABLE CAUSE

REMEDY

Incorrect tire pressure.

Inflate to proper pressure. (Refer to 12-10)

Attaching parts loose, defective.

Tighten loose parts, replace.

Bent axles.

Replace with new parts.

Incorrect tire pressure.

Inflate to proper pressure. (Refer to 12-10)

Bent axles.

Replace with new parts.

Dragging brakes.

Inspect and adjust brakes. (Refer to 32-42)

Wheels out of balance.

Balance wheel and tire.

Improper toe-in.

Adjust toe-in. (Refer to 32-10)

Wheels out of balance

Balance wheel and tire.

Worn tire.

Replace.

EFFECTIVITY: All

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

3. MAINTENANCE PRACTICES A. Main Gear Fairing - Serials 1005 thru 1137 (See Figure 32-101) (1)

(2)

Removal - Main Gear Fairing (a) Remove screws along seam securing forward and aft wheel fairings together. Remove aft wheel fairing from airplane. (b) Remove screws on top, inboard section of forward wheel fairing securing fairing to upper adjustment bracket. (c) Remove screw on inboard section of forward wheel fairing securing fairing to lower adjustment bracket. (d) Remove bolt and washer securing forward wheel fairing to axle and remove from airplane. (e) Remove upper and lower screws clamping trailing edge of strut fairing together. (f) Remove screw securing strut fairing to strut and remove from airplane. (g) Remove screws attaching upper strut fairing to wing and remove from airplane. Installation - Main Gear Fairing Note:

To ensure clearance between wheel assembly and fairing assembly, finger tighten all attaching parts and adjust fairing assembly before final tightening. Ensure anti-chafe spacers are properly secured by nutplate clip prior to strut fairing installation.

(a) (b) (c)

Pry trailing edge seam of strut fairing open, position around strut, and install upper and lower screws clamping trailing edge of strut fairing together. Install screw securing strut fairing to inboard side of strut. Pry trailing edge seam of upper strut fairing open, position around strut, and install screws attaching upper strut fairing to wing. Note:

(d) (e) (f) (g)

Position forward wheel fairing around wheel assembly and strut fairing, and install screw securing fairing to lower adjustment bracket. Install screws at top, outboard section of forward wheel fairing securing fairing to upper adjustment bracket. Finger tighten washer and bolt securing forward wheel fairing to axle. Position aft wheel fairing to forward wheel fairing at seams. Apply light force to mate the wheel fairings together and install screws securing seams. CAUTION:

(h) (i)

To facilitate proper installation, adjust upper and lower adjustment brackets if necessary.

Maintain minimum clearance of 0.75 inch (1.90 cm) between tire and wheel fairings.

Adjust forward and aft wheel fairings as required for proper clearance between tire and fairings. Torque bolt securing forward wheel fairing to axle to 25 - 30 in-lb (2.82 - 3.39 Nm) and Loctite bolt. (Refer to 20-40)

EFFECTIVITY: Serials 1005 thru 1137

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CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

B. Main Gear Fairing - Serials 1138 thru 1885 (See Figure 32-101) (1)

(2)

Removal - Main Gear Fairing (a) Remove screws along seam securing inboard and outboard wheel fairings together. (b) Remove screw securing inboard wheel fairing to lower adjustment bracket and remove from airplane. (c) Remove bolt and washer securing wheel fairing to axle. (d) Remove screws and spacer securing wheel fairing to upper adjustment bracket and remove from airplane. (e) Serials 1138 thru 1316: Remove upper and lower screws clamping trailing edge of strut fairing together. (f) Serials 1317 thru 1885: Remove hinge rod. 1 Cut safety wire used to secure upper section of hinge on strut fairing to hinge rod. 2 Support strut fairing and pull hinge rod upward to remove hinge rod from strut fairing assembly. (g) Remove screw securing strut fairing to strut and remove from airplane. (h) Remove screws and well nuts attaching upper strut fairing to wing and remove from airplane. Installation - Main Gear Fairing Note:

To ensure clearance between wheel assembly and fairing assembly, finger tighten all attaching parts and adjust fairing assembly before final tightening. Serials 1138 thru 1316: Ensure anti-chafe spacers are properly secured by nutplate clip prior to strut fairing installation.

(a) (b) (c) (d)

Pry trailing edge seam of upper strut fairing open, position around strut, and install screws and well nuts attaching upper strut fairing to wing. Pry trailing edge seam of strut fairing open, slide fairing into position under upper strut fairing, and install screw securing fairing to strut. Serials 1138 thru 1316: Install upper and lower screws clamping trailing edge of strut fairing together. Serials 1317 thru 1885: Install hinge rod. 1 Install hinge rod downward between strut fairing seam at hinge. 2 Safety wire hinge rod to hole on upper section of hinge attached to strut fairing. (Refer to 20-50) Note:

(e) (f) (g) (h) (i) (j)

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To facilitate proper installation, adjust upper and lower adjustment brackets if necessary.

Position outboard wheel fairing around wheel assembly and strut fairing, and install screws and spacer securing fairing to upper adjustment bracket. Finger tighten washer and bolt securing outboard wheel fairing to axle. Position inboard wheel fairing to outboard wheel fairing and install screws securing seams. Loctite and install screw securing inboard wheel fairing to lower adjustment bracket. (Refer to 20-40) Adjust inboard and outboard wheel fairings as required for clearance between tire and fairings. Torque bolt securing outboard wheel fairing to axle to 25 - 30 in-lb (2.82 - 3.39 Nm) and Loctite bolt. (Refer to 20-40) EFFECTIVITY: Serials 1138 thru 1885

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

C. Main Gear Fairing - Serials 1886 & subs (See Figure 32-101) (1)

(2)

Removal - Main Gear Fairing (a) Remove screws securing access panel to inboard fairing bracket. (b) Remove screws securing access panel to wheel fairing. Remove access panel from airplane. (c) Remove screw and washer securing lower fairing to axle. Remove lower fairing from airplane. (d) Remove screws securing upper fairing to brackets on lower attach fitting. (e) Remove screws securing trailing edge of upper fairing to strut. Remove upper fairing from airplane. Installation - Main Gear Fairing (a)

Acquire necessary tools, equipment, and supplies. Description Loctite®

P/N or Spec. 222 (Serials 1005 thru 2240 before SB2X-32-21)

Supplier Any Source

Purpose Secure fairing.

242 or 243 (Serials 1005 thru 2240 after SB2X-32-21, 2241 & subs) (b) (c) (d) (e) (f) (g) (h) (i) (j)

Pry trailing edge seam of upper fairing open, position around strut and over upper flange of grommet. Install screws securing trailing edge of upper fairing to strut. Install screws securing upper fairing to brackets on lower attach fitting. Position lower fairing around wheel and strut and over lower flange of grommet. Apply Loctite to threads of screw and install screw and washer securing lower fairing to axel. Position access panel to lower fairing and secure with screws. Install screws and washers securing access panel to inboard fairing bracket. Verify gap between edge of fairings and grommet does not exceed 0.05 inch (1.27 mm). Verify gap between tire and edge of lower fairing is a minimum of 0.37 inch (9.39 mm) on all sides.

EFFECTIVITY: Serials 1886 & subs

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CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

1

2 3 4 2

14 13

7

LEGEND 1. Well Nut 2. Nutplate Clip 3. Upper Strut Fairing 4. Strut 5. Strut Fairing 6. Screw 7. Wheel Fairing 8. Access Plug 9. Washer 10. Bolt 11. Lower Adjustment Bracket 12. Upper Adjustment Bracket 13. Stand Off 14. Nutplate 15. Spacer 16. Trim

16 6

5

15

12 6 9

11 6

7

9

10 8 Serials 1005 thru 1137.

Figure 32-101 Main Gear Fairing Installation - Serials 1005 thru 1137 (Sheet 1 of 3)

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EFFECTIVITY: Serials 1005 thru 1137

SR22_MM32_1045C

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

1

6

3

6 14 6

17

7

2 7 6

4

9

15

10

13 12 5

8

5 6

9

Serials 1317 thru 1651. Serials 1652 thru 1877, 1879 thru 1885.

6

2

15 5

11

LEGEND 1. Well Nut 2. Nutplate Clip 3. Upper Strut Fairing 4. Strut 5. Strut Fairing 6. Screw 7. Wheel Fairing 8. Access Plug 9. Washer 10. Bolt 11. Lower Adjustment Bracket 12. Upper Adjustment Bracket 13. Stand Off 14. Nutplate 15. Spacer 17. Nut

Serials 1138 thru 1316.

SR20_MM32_1723C

Figure 32-101 Main Gear Fairing Installation - Serials 1138 thru 1885 (Sheet 2 of 3) EFFECTIVITY: Serials 1138 thru 1885

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CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

2

6

3 6

6 Serials 1886 thru 2036.

3 6

8

15

6

Serials 1886 thru 2221.

6 18

7

4

6

6

18 9

6 19 11

7

LEGEND 2. Nutplate Clip 3. Upper Strut Fairing 4. Strut 6. Screw 7. Wheel Fairing 8. Access Plug 9. Washer 10. Bolt 11. Lower Adjustment Bracket 15. Nutplate 18. Grommet 19. Access Door SR20_MM32_2456B

Figure 32-101 Main Gear Fairing Installation - Serials 1886 & subs (Sheet 3 of 3)

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Page 8 15 Dec 2014

EFFECTIVITY: Serials 1886 & subs

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

D. Main Gear Assembly - Serials 1005 thru 1885 (See Figure 32-102) (1)

Removal - Main Gear Assembly (a)

Acquire necessary tools, equipment, and supplies. Description Plastic Wedge

(b) (c) (d) (e)

P/N or Spec. -

Supplier Any Source

Purpose Removal of strut.

Remove main gear fairings. (Refer to 32-10) Raise airplane on jacks. (Refer to 07-10) Drain hydraulic fluid from brake system. Disconnect and cap flexible brake line at bracket on upper strut fitting. CAUTION:

When strut clamp is removed, exercise caution to prevent strut assembly from coming into contact with wing skin.

(f) (g)

(2)

(3)

(4)

Remove nuts, washers, and bolts at clamp securing strut assembly to canted rib. Squarely strike the upper side of the strut near the clamp fitting with a rubber mallet to move the strut down and away from the clamp fitting. (h) Insert and drive plastic wedge into space between strut and clamp fitting to dislodge strut from clamp. (i) Allow strut assembly to gently swing downward. (j) With gear assembly supported, remove bolt connecting upper attach fitting to rib attach fitting and lower assembly to the ground, clear of airplane. Disassembly - Main Gear Assembly (a) Remove bolt, washer, and nut securing brake line bracket to upper strut fitting. (b) Remove brake line secured to strut. (Refer to 32-42) (c) Remove main wheel. (Refer to 32-41) (d) Remove bolts, washers, lower wheel fairing bracket, and nuts securing axle and brake assembly to axle fitting. (e) Remove bolts, washers, plates, and nuts securing strut to axle fitting and upper wheel fairing bracket. (f) Remove bolts, washers, and nuts securing upper fitting and shim to strut. Assembly - Main Gear Assembly (a) Position upper fitting and shim to strut. (b) Secure upper fitting and shim to strut with bolts, washers, and nuts. (c) Align upper wheel fairing bracket with lower holes of plate and position to lower strut. Secure strut to axle fitting and upper wheel fairing bracket with bolts, washers, plates, and nuts. (d) Position lower wheel fairing bracket to upper holes of lower axle fitting. Secure axle and brake assembly to axle fitting with bolts, washers, and nuts. (e) Install main wheel. (Refer to 32-41) (f) Install brake line to strut. (Refer to 32-42) (g) Install bolt, washer, and nut securing brake line bracket to upper strut fitting. Installation - Main Gear Assembly (a) Support main gear assembly under airplane and lift assembly up to align main gear upper attach fitting with wing rib attach fitting. Install bolt securing main gear assembly to wing rib attach fitting and torque to 25.0 - 50.0 in-lb (2.8 - 5.6 Nm).

EFFECTIVITY: Serials 1005 thru 1885

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CIRRUS

AIRPLANE MAINTENANCE MANUAL

(b)

(5)

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Page 10 15 Jun 2010

MODEL SR20

Swing strut assembly up into position and secure strut clamp fittings to canted rib attach fitting bolts with nuts and washers. Torque to 150.0 in-lb (16.9 Nm). (c) Connect flexible brake line at bracket on upper strut fitting. (d) Lower airplane and remove jacks. (Refer to 07-10) (e) Final torque bolts securing strut to canted rib. Torque to 160.0 - 190.0 in-lb (18.1 - 21.5 Nm). (f) Fill brake system with hydraulic fluid as required. (Refer to 12-10) (g) Bleed brake system. (Refer to 32-42) (h) Install main landing gear fairings. (Refer to 32-10) Inspection/Check - Main Gear Assembly (a) Inspect main gear fairings for cracks, wear, and loose fasteners. (b) Remove main gear fairings. (Refer to 32-10) (c) Verify lower strut fairing stand-off securely attached. (d) Inspect anti-chafe spacers for cracking, rubbing, and general condition. (e) Raise airplane on jacks. (Refer to 07-10) (f) Inspect main gear attachments and bolts for security, condition, cracks, and corrosion. (g) Inspect main gear strut assembly for cracking, splintering, condition, and security. (h) Check brake lines for leakage and security to main gear strut. (i) Lower airplane and remove from jacks. (Refer to 07-10) (j) Install main gear fairings. (Refer to 32-10)

EFFECTIVITY: Serials 1005 thru 1885

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

E. Main Gear Assembly - Serials 1886 & subs (See Figure 32-102) (1)

Removal - Main Gear Assembly (a) Remove main gear fairings. (Refer to 32-10) (b) Remove access panel LW1 or RW1. (Refer to 06-00) (c) Raise airplane on jacks. (Refer to 07-10) (d) Drain hydraulic fluid from brake system. (e) Disconnect strut assembly brake line from bulkhead fitting. Cap brake line to prevent system contaminates. (f) Remove bolt, washers, and nut securing lightning protection wire to lateral wing rib. (g) Serials 2016 & subs w/ Perspective Avionics: Disconnect electrical connector from brake temperature sensor. (Refer to 32-42) (h) Serials 2016 & subs w/ Perspective Avionics: Remove cable ties securing brake temperature sensor wire harness to strut assembly. (i) Remove nuts, washers, bolts, and clamp securing strut assembly to lower attach fitting. CAUTION:

When removing strut from lower attach bracket, use caution to prevent damaging upper strut fitting and upper attach bracket.

(j)

(2)

(3)

(4)

If necessary, gently tap upper side of strut with a rubber mallet to move strut away from lower attach fitting. (k) While supporting gear assembly, remove bolts and washers securing strut upper attach fitting to wing rib. Remove strut assembly from airplane. Disassembly - Main Gear Assembly (a) Remove strut assembly brake line. (Refer to 32-42) (b) Remove main wheel. (Refer to 32-41) (c) Serials 1886 thru 2074: Remove bolts, washers, and nuts securing axle and brake assembly to axle fitting. (d) Serials 2075 & subs: Remove bolts, washers, and nuts securing axle, shim, and brake assembly to axle fitting. (e) Remove bolts, washers, plates, and nuts securing strut and inboard fairing bracket to axle fitting. (f) Remove bolts, washers, and nuts securing strut upper end fitting assembly to strut. Assembly - Main Gear Assembly (a) Position strut upper end fitting assembly to strut and secure with bolts, washers, and nuts. (b) Position strut and inboard fairing bracket to axle fitting and secure with bolts, washers, plates, and nuts. (c) Serials 1886 thru 2074: Position axle and brake assembly to axle fitting and secure with bolts, washers, and nuts. (d) Serials 2075 & subs: Position axle, shim, and brake assembly to axle fitting and secure with bolts, washers, and nuts. (e) Install main wheel. (Refer to 32-41) (f) Install strut assembly brake line. (Refer to 32-42) Installation - Main Gear Assembly CAUTION: (a) (b)

Install main landing gear carefully so as to not chafe the brake lines.

Position gear assembly to wing rib and secure upper attach bracket with bolts and washers. Position strut and clamp to lower attach bracket and secure with bolt, washers, and nut. Torque to 160.0 - 190.0 in-lb (18.1 - 21.5 Nm).

EFFECTIVITY: Serials 1886 & subs

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Page 11 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

(c) (d)

(5)

(6)

Perform Inspection/Check - Main Gear Assembly. (Refer to 32-10) Serials 2016 & subs w/ Perspective Avionics: Connect electrical connector to brake temperature sensor. (Refer to 32-42) (e) Serials 2016 & subs w/ Perspective Avionics: Position brake temperature sensor wire harness to strut assembly and secure with cable ties. (f) Position ground wire to lateral wing rib and secure with bolt, washers, and nut. (g) Connect strut assembly brake line to bulkhead fitting. (Refer to 32-42) (h) Fill brake system with hydraulic fluid. (Refer to 12-10) (i) Bleed brake system. (Refer to 32-42) (j) Lower airplane off jacks. (Refer to 07-10) (k) Install access panel LW1 or RW1. (Refer to 06-00) (l) Install main landing gear fairings. (Refer to 32-10) Inspection/Check - Main Gear Assembly (a) Inspect main gear fairings for cracks, wear, and loose fasteners. (b) Remove main gear fairings. (Refer to 32-10) (c) Remove access panel LW1 or RW1. (Refer to 06-00) (d) Raise airplane on jacks. (Refer to 07-10) (e) Inspect main gear attachments and bolts for security, condition, cracks, and corrosion. (f) Inspect main gear strut assembly for cracking, splintering, condition, and security. (g) Inspect brake lines for chafing or leakage. Ensure brake line is secured to main gear strut. (h) Install access panel LW1 or RW1. (Refer to 06-00) (i) Lower airplane and remove from jacks. (Refer to 07-10) (j) Install main gear fairings. (Refer to 32-10) Inspection/Check - Main Gear Gap Measurement (a) Remove main gear fairings. (Refer to 32-10) (b) Remove access panel LW1 or RW1. (Refer to 06-00) (c) Raise airplane on jacks. (Refer to 07-10) (d) With grommet tight against inboard side of strut, verify 0.001 - 0.016 inch (0.025 - 0.406 mm) gap exists between clamp and grommet. Note:

(e) (f) (g) (h)

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Page 12 01 Jan 2012

Additional washers (two maximum, any combination) may be added between clamp and lower attach fitting to obtain gap tolerance. Refer to IPC, Main Landing Gear Installation for approved washers.

If necessary, install additional washers (two maximum) between clamp and lower attach fitting to obtain gap tolerance. If gap tolerance can not be obtained, replace strut grommet. Install access panel LW1 or RW1. (Refer to 06-00) Lower airplane and remove from jacks. (Refer to 07-10) Install main gear fairings. (Refer to 32-10)

EFFECTIVITY: Serials 1886 & subs

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

LOWER LANDING GEAR ATTACH BRACKET (REF) UPPER LANDING GEAR ATTACH BRACKET (REF) WING RIB (REF)

6

3 16 A

15

6

16

1

15

C

D

E

F

CANTED RIB (REF)

1

15

B

2 18

16

15 4 5

16

15

10

1

18 15

15

15

16

BRAKE ASSEMBLY (REF)

15 18

1 16

9 15

17

19 1 WHEEL & TIRE ASSEMBLY (REF)

7 8 15

11

14 1

12 13

LEGEND 1. Bolt 2. Grommet 3. Strut End Upper Fitting 4. Strut Clamp 5. Main Gear Strut 6. Brake Line 7. Torque Plate 8. Axle 9. Brake Caliper 10. Shim 11. Cotter Pin 12. Axle Nut 13. Wheel Pant Mount 14. Spacer 15. Washer 16. Nut 17. Axle Fitting 18. Bracket 19. Plate

DETAIL A Serials 1005 thru 1877, 1879 thru 1885 before SB2X-32-21.

SR20_MM32_1029D

Figure 32-102 Main Landing Gear Installation - Serials 1005 thru 1885 before SB2X-32-21 (Sheet 1 of 6) EFFECTIVITY: Serials 1005 thru 1885 before SB2X-32-21

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Page 13 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

UPPER LANDING GEAR ATTACH BRACKET (REF)

MODEL SR20

LOWER LANDING GEAR ATTACH BRACKET (REF)

WING RIB (REF)

6

3 16 15

6

1

15

1

15

16

CANTED RIB (REF)

2 18

16

15 4 5 16

15

10 18 15

15

16

15 10

1

18 19 8

15 1

16 15

BRAKE ASSEMBLY (REF)

DETAIL B

WHEEL & TIRE ASSEMBLY (REF)

15 1

11

LEGEND 1. Bolt 2. Grommet 3. Strut End Upper Fitting 4. Strut Clamp 5. Main Gear Strut 6. Brake Line 7. Torque Plate 8. Axle 9. Brake Caliper 10. Shim 11. Cotter Pin 12. Axle Nut 13. Wheel Pant Mount 14. Spacer 15. Washer 16. Nut 17. Axle Fitting 18. Bracket 19. Plate

12

Serials 1005 thru 1877, 1879 thru 1885 after SB2X-32-21.

SR20_MM32_3692

Figure 32-102 Main Landing Gear Installation - Serials 1005 thru 1885 after SB2X-32-21 (Sheet 2 of 6)

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Page 14 15 Dec 2014

EFFECTIVITY: Serials 1005 thru 1885 after SB2X-32-21

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

WING RIB (REF) LOWER LANDING GEAR ATTACH BRACKET (REF)

3

15 16 NOTE Additional washers (two maximum) may be added between clamp and lower attach fitting to obtain gap tolerance. Refer to IPC, Main Landing Gear Installation for approved washers.

10

UPPER LANDING GEAR ATTACH BRACKET (REF)

6 4

1

GROUND STRAP (REF)

15 15

17

1

15

1

18

2 5

BRAKE ASSEMBLY (REF)

15

19

15

16

9 1

15 16

7

15 1

WHEEL & TIRE ASSEMBLY (REF)

8 15 15 15

DETAIL

16

14

11

C

Serials 1886 thru 2074 before SB2X-32-21.

LEGEND 1. Bolt 2. Grommet 3. Strut Upper End Fitting 4. Strut Clamp 5. Main Gear Strut 6. Brake Line 7. Torque Plate 8. Axle 9. Brake Caliper 10. Shim 11. Cotter Pin 12. Axle Nut 13. Wheel Pant Mount 14. Spacer 15. Washer 16. Nut 17. Axle Fitting 18. Bracket 19. Plate

13 12

SR20_MM32_2426

Figure 32-102 Main Landing Gear Installation - Serials 1886 thru 2074 before SB2X-32-21 (Sheet 3 of 6) EFFECTIVITY: Serials 1886 thru 2074 before SB2X-32-21

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Page 15 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

WING RIB (REF) LOWER LANDING GEAR ATTACH BRACKET (REF)

3

15 16 NOTE Additional washers (two maximum) may be added between clamp and lower attach fitting to obtain gap tolerance. Refer to IPC, Main Landing Gear Installation for approved washers.

10

UPPER LANDING GEAR ATTACH BRACKET (REF)

6 4

1

GROUND STRAP (REF)

15 15

17

1

15

2 5

18 10

19

8

16 15 16 15

15

16

15 1 WHEEL & TIRE ASSEMBLY (REF) BRAKE ASSEMBLY (REF)

DETAIL D

15 1

11

12

LEGEND 1. Bolt 2. Grommet 3. Strut Upper End Fitting 4. Strut Clamp 5. Main Gear Strut 6. Brake Line 7. Torque Plate 8. Axle 9. Brake Caliper 10. Shim 11. Cotter Pin 12. Axle Nut 13. Wheel Pant Mount 14. Spacer 15. Washer 16. Nut 17. Axle Fitting 18. Bracket 19. Plate

Serials 1886 thru 2074 after SB2X-32-21. SR20_MM32_3691

Figure 32-102 Main Landing Gear Installation - Serials 1886 thru 2074 after SB2X-32-21 (Sheet 4 of 6)

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Page 16 15 Dec 2014

EFFECTIVITY: Serials 1886 thru 2074 after SB2X-32-21

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

WING RIB (REF) LOWER LANDING GEAR ATTACH BRACKET (REF)

3

15 16 NOTE

UPPER LANDING GEAR ATTACH BRACKET (REF)

Additional washers (two maximum) may be added between clamp and lower attach fitting to obtain gap tolerance. Refer to IPC, Main Landing Gear Installation for approved washers.

10 6 4

1

GROUND STRAP (REF)

15 15

17 1

15

2

15 16

18

1

15

BRAKE ASSEMBLY (REF)

5 10

9

1

WHEEL & TIRE ASSEMBLY (REF)

10 15

10

7 8 15 15

16

14

11

DETAIL E

LEGEND 1. Bolt 2. Grommet 3. Strut Upper End Fitting 4. Strut Clamp 5. Main Gear Strut 6. Brake Line 7. Torque Plate 8. Axle 9. Brake Caliper 10. Shim 11. Cotter Pin 12. Axle Nut 13. Wheel Pant Mount 14. Spacer 15. Washer 16. Nut 17. Axle Fitting 18. Bracket

13

Serials 2075 thru 2240 before SB2X-32-21.

12

SR20_MM32_3482A

Figure 32-103 Main Landing Gear Installation - Serials 2075 thru 2240 before SB2X-32-21 (Sheet 5 of 6) EFFECTIVITY: Serials 2075 thru 2240 before SB2X-32-21

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Page 17 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

WING RIB (REF) LOWER LANDING GEAR ATTACH BRACKET (REF)

3

15 16 NOTE 4

UPPER LANDING GEAR ATTACH BRACKET (REF)

10 6 4

1 17 1

15

Additional washers (two maximum) may be added between clamp and lower attach fitting to obtain gap tolerance. Refer to IPC, Main Landing Gear Installation for approved washers.

GROUND STRAP (REF)

15

4 15

15 16

2

18

5 10

10 10

16 15 16 15

8

15 1

BRAKE ASSEMBLY (REF)

15 1

11

DETAIL F Serials 2075 thru 2240 after SB2X-32-21, 2241 & subs.

WHEEL & TIRE ASSEMBLY (REF)

12

LEGEND 1. Bolt 2. Grommet 3. Strut Upper End Fitting 4. Strut Clamp 5. Main Gear Strut 6. Brake Line 8. Axle 10. Shim 11. Cotter Pin 12. Axle Nut 15. Washer 16. Nut 17. Axle Fitting 18. Bracket SR20_MM32_3627

Figure 32-103 Main Landing Gear Installation - Serials 2075 thru 2240 after SB2X-32-21, 2241 & subs (Sheet 6 of 6)

32-10

Page 18 15 Dec 2014

EFFECTIVITY: Serials 2075 thru 2240 after SB2X-32-21, 2241 & subs

CIRRUS F.

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

Adjustment/Test - Wheel Toe-In Check (1)

Adjustment/Test - Wheel Toe-In Check (See Figure 32-104) Correct wheel alignment plays a critical role in maintaining tire wear and should be checked whenever abnormal or excessive wear is noted. To correct wheel alignment the airplane is placed on greased-slide plates which allow the main wheels to easily assume their true alignment position. Shims are inserted or removed to adjust camber (Serials 1005 thru 1885) and toe-in. Measurements are taken on wheel flange. (a)

Acquire necessary tools, equipment, and supplies. Description

P/N or Spec.

Supplier

Purpose

Plumb Bob

-

Any Source

Determine airplane centerline.

Straightedge

-

Any Source

Measure toe-in.

Framing Squares

-

Any Source

Measure toe-in.

Wood Blocks

-

Any Source

Measure toe-in.

Protractor a

-

Any Source

Measure camber.

Shim, Toe-In

Refer to IPC, Main Landing Gear Installation for approved shims

Cirrus Design

Adjust toe-in.

Shim, Cambera

Refer to IPC, Main Landing Gear Installation for approved shims

Cirrus Design

Adjust camber.

a. Serials 1005 thru 1885 only.

(b) (c) (d) (e) (f) (g) (h) (i) (j) (k)

(l)

EFFECTIVITY: All

Remove main landing gear fairings. (Refer to 32-10) Remove nose landing gear fairing. (Refer to 32-20) Place airplane on level surface. Serials 1005 thru 1885: For camber measurement, ensure airplane is at maximum gross weight. (Refer to POH) Ensure tires are properly inflated. (Refer to 12-10) Place metal slide plates approximately 16.0 inches (40.64 cm) square in front of each main gear wheel. Grease surface of bottom plate. Place top plate of same dimension over bottom plate. Roll main gear wheels onto greased metal slide plates. Establish airplane centerline by dropping plumb bob line from forward center position (located immediately aft of nose landing gear bridge) and from aft center position (located at tail tie down). Draw chalk line between two plumb bob points. Establish perpendicular line to airplane centerline just forward of main wheels using intersecting arc method.

32-10

Page 19 15 Dec 2014

CIRRUS (m) (n) (o) (p) (q) (r) (s) (t)

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

Using squares, wood blocks, and straightedge, position straightedge parallel to second chalk line just below axle nut. Roll airplane forward until tires just touch straightedge. Place two marks 6.5 inches (16.51 cm) apart on wheel flanges just below axle nut, and level. Place framing square against straightedge and level with wheel flange marks. Measure distance between blade of framing square and front flange mark to determine X. Measure distance between blade of framing square and rear flange mark to determine Y. Determine toe-in angle by subtracting Y from X. Serials 1005 thru 2074: Adjust toe-in. Note:

Maximum number of shims not to exceed 4 per wheel.

1

(u)

If toe-in angle exceeds +0.5° (+0.057”), install or remove shims to obtain proper tolerance. Serials 2075 & subs: Adjust toe-in. Note:

Maximum number of shims not to exceed 2 per wheel.

1

(v)

If toe-out angle exceeds -0.25° (-0.028") or toe-in angle exceeds +0.75° (+0.085"), install or remove shims to obtain proper tolerance. Serials 1005 thru 1885: Adjust camber. Note:

Maximum number of shims not to exceed 4 per wheel.

1

(w) (x)

32-10

Page 20 15 Dec 2014

Determine camber by reading protractor level held vertically against outboard flanges of wheel. 2 If camber angle is not 0.0° (+0.0”), install or remove shims as required to obtain camber angle as close to 0.0° (+0.0”) as possible. Install main landing gear fairings. (Refer to 32-10) Install nose landing gear fairing. (Refer to 32-20)

EFFECTIVITY: All

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

TIE DOWN

PLUMB BOB PERPENDICULAR LINE

90°

BISECTING MARKS

HOOK

SQUARE 3 PLACES

Serials 1005 thru 1877, 1879 thru 1885.

PERPENDICULAR LINE

6.5 inches (16.5 cm)

GREASED SLIDE PLATES STRAIGHT EDGE

HOOK

HOOK

PLUMB BOB PLUMB BOB

Serials 1878, 1886 thru 2064. Serials 2065 & subs.

SR20_MM32_1035B

Figure 32-104 Main Wheel Alignment (Sheet 1 of 3) EFFECTIVITY: All

32-10

Page 21 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

WHEEL TOE - IN AND CAMBER CHECK Measure dimensions "X" and "Y". Toe-in is difference between X and Y. (i.e. Y - X) Measure camber by reading protractor level held vertically against outboard flanges of wheel.

Y

X

SQUARE

TOE - IN CHECK Install shims to set toe-angle to 0.0°. Toe-out not to exceed -0.0° (-0.0"). Toe-in not to exceed +0.5° (+0.057"). Number of shims not to exceed four per wheel.

STRAIGHT EDGE

SHIM

Serials after SBX-32-21.

NEGATIVE TOE-OUT

0° POSITIVE + TOE-IN

NOTE Serials 1005 thru 1885 only.

RIGHT MAIN WHEEL

Figure 32-104 Main Wheel Alignment - Serials 1005 thru 2074 (Sheet 2 of 3)

32-10

Page 22 15 Dec 2014

EFFECTIVITY: Serials 1005 thru 2074

SR20_MM32_1036B

CIRRUS

AIRPLANE MAINTENANCE MANUAL

MODEL SR20

WHEEL TOE - IN CHECK Measure dimensions "X" and "Y". Toe-in is difference between X and Y. (i.e. Y - X).

Y

X

SQUARE

STRAIGHT EDGE

NEGATIVE TOE-OUT

0° POSITIVE + TOE-IN

SHIM

Serials 2075 thru 2240 before SB2X-32-21.

TOE - IN CHECK Install shims to set toe-angle to 0.0°. Toe-out not to exceed -0.25° (-0.028"). Toe-in not to exceed +0.75° (+0.085"). Number of shims not to exceed two per wheel.

NEGATIVE TOE-OUT

0° POSITIVE + TOE-IN

SHIM

Serials 2075 thru 2240 after SB2X-32-21, 2241 & subs.

RIGHT MAIN WHEEL

SR20_MM32_3485A

Figure 32-104 Main Wheel Alignment - Serials 2075 & subs (Sheet 3 of 3) EFFECTIVITY: Serials 2075 & subs

32-10

Page 23 15 Dec 2014

CIRRUS

AIRPLANE MAINTENANCE MANUAL

Intentionally Left Blank

32-10

Page 24 15 Dec 2014

EFFECTIVITY: All

MODEL SR20