SERVICE BULLETIN SB7106

40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS C. WHEEL HALVES – INSPECT BOLT HOLES Inspect features of the bolt holes as shown in Figure 2. Figure 2 Wheel half bolt hole features (1) Refer to Figure 3. Use gage pin diameters from Ø 0.321 inch to Ø 0.328 inch and measure all the bolt holes of the inboard and outboard wheel halves. The gage pins should fit into each of the bolt holes. (2) Use a gage pin diameter of Ø 0.329 inches. If the gage pin can fit into one of the bolt holes, then the bolt hole is too large and the wheel half is considered scrap. Refer to E. Inspection Wear Limit Results. SERVICE BULLETIN SB7106 Page 6 of 17 Initial Release 08-14-2015 Rev. B, 01-25-2016 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS Figure 3 Measure bolt hole diameter SERVICE BULLETIN Initial Release 08-14-2015 Rev. B, 01-25-2016 SB7106 Page 7 of 17 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS NOTE: With the outboard wheel halves, be sure that the register face is laying on the flat surface and not the register lip. Refer to Figure 4. Figure 4 Setup for bolt hole length measurement SERVICE BULLETIN SB7106 Page 8 of 17 Initial Release 08-14-2015 Rev. B, 01-25-2016 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS (3) Refer to Figure 5. With the wheel register side of each wheel half laying on a flat surface, measure the bolt hole length using the depth gage on a Vernier caliper. Refer to Table 2 for acceptable limits. (4) Check the base material for noticeable compression from the washer. This is a result of applying a torque greater than the maximum torque allowed for the wheel nuts. If there is notable compression of the base material, then the wheel half is considered scrap. Refer to E. Inspection Wear Limit Results. Figure 5 Measure bolt hole length Table 2 Bolt hole length limits Wheel Half Subassy Part No. Wheel Assembly Part No. Measurement Action 162-02700 (outboard) 40-83, 40-83A Less than 1.538 inch Replace wheel half 161-03000 (inboard) Less than 1.588 inch Replace wheel half 162-02711 (outboard) 40-83B Less than 1.588 inch Replace wheel half 161-03011 (inboard) Less than 1.588 inch Replace wheel half SERVICE BULLETIN Initial Release 08-14-2015 Rev. B, 01-25-2016 SB7106 Page 9 of 17 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS D. WHEEL HALVES – INSPECT LATERAL MOVEMENT ALONG WHEEL REGISTERS Inspect lateral movement limits of wheel halves. CAUTION: AVOID C-CLAMP INDUCED DAMAGE TO THE BEAD SEAT. (1) Refer to Figure 6. Bring both wheel halves together so that one is stacked on top of the other (outboard or inboard). Clamp the bottom wheel half to a flat surface. Figure 6 Setup for dial indicator inspection SERVICE BULLETIN SB7106 Page 10 of 17 Initial Release 08-14-2015 Rev. B, 01-25-2016 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS (2) Refer to Figure 7. Set the dial indicator so that it is touching the register lip of the bottom wheel half. (a) Zero out the dial indicator. Figure 7 Setup the first position of the dial indicator SERVICE BULLETIN Initial Release 08-14-2015 Rev. B, 01-25-2016 SB7106 Page 11 of 17 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS (3) Refer to Figure 8. Carefully move the dial indicator to the register lip of the top wheel half without disturbing the reading on the dial indicator. Figure 8 Setup the second position of the dial indicator SERVICE BULLETIN SB7106 Page 12 of 17 Initial Release 08-14-2015 Rev. B, 01-25-2016 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS (4) Lightly pull the top wheel half (without tilting it) toward you and slowly rotate the top wheel half. (a) Mark at least 3 of the biggest deviations that are found. (5) Once rotated a full 360 degree of rotation, lightly push the top wheel half (without tilting it) away from you until it cannot go any further, then slowly rotate the top wheel half. (a) Mark at least 3 of the biggest deviations that are found. (6) Once rotated another full 360 degree of rotation, shift the top wheel half back and forth at the highest marked deviations to determine the total register clearance at each point. (a) Add the total reading, “A” going clockwise (push or pull depending on the setup) from the zero indicator and total reading, “B” going counterclockwise (push or pull depending on the setup) from the zero indicator. This is the total clearance between the wheel half registers. (7) Refer to Figure 9. If the total register clearance is more than 0.007 inch, then both wheel halves are considered scrap. Refer to E. Inspection Wear Limit Results. Figure 9 Dial indicator reading, example SERVICE BULLETIN Initial Release 08-14-2015 Rev. B, 01-25-2016 SB7106 Page 13 of 17 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS E. INSPECTION WEAR LIMIT RESULTS (1) If both wheel halves satisfy the wear limit requirements in accordance with this service bulletin., then complete the service bulletin accomplishment instructions starting with paragraph F. Assemble the Wheel. NOTES:  Wheel halves are not procurable at the 151- or 152- part level and must be obtained at the 161- or 162- wheel half subassembly level which includes the installed bearing cup.  Replace bearing cups and cones as a matched set. A new wheel half subassembly includes a new installed bearing cup. If replacing a wheel half subassembly, replace the mating bearing cone. (2) If either of the wheel halves do not satisfy the wear limit requirements per section 2.C., then replace the applicable wheel half subassembly and complete the service bulletin accomplishment instructions starting with paragraph F. Assemble the Wheel. (3) If the total register clearance per section 2.D. is more than 0.007 inches, then replace both wheel half subassemblies and complete the service bulletin accomplishment instructions starting with paragraph F. Assemble the Wheel. SERVICE BULLETIN SB7106 Page 14 of 17 Initial Release 08-14-2015 Rev. B, 01-25-2016 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS F. ASSEMBLE THE WHEEL (1) Wheel and tire pre-assembly preparation (a) Examine the bead seat area of the wheel halves. If necessary, remove all lubricant, grease or foreign material with a clean cloth moistened with a mild soap and water solution or with denatured alcohol. (b) The mating surfaces of the wheel halves should not have nicks, burrs, small dents, or other damage. Damaged mating surfaces can prevent the wheel halves from mating or sealing. (c) Make sure that the tire is clean inside. If it is not clean, then wipe the bead base with a clean cloth moistened with a mild dishwashing soap and water solution or a suitable rubber cleaner. (2) Tire mounting and assembly of wheel Refer to Figure 10. SAFETY WARNING: WEAR THE APPROPRIATE PROTECTIVE CLOTHING AND ALWAYS FOLLOW PROPER TIRE INFLATION SAFETY PRACTICES. SERVICE THE TIRE WITH INFLATION SAFETY EQUIPMENT DESIGNED FOR THIS OPERATION. NOTE: Refer to AWBPC0001 for component part numbers for the 40-83, 40-83A, and 40-83B wheel assemblies. (a) After the inside of the tire has been cleaned, lubricate lightly with tire talc. (b) Inflate the tube with dry nitrogen to slightly round, and insert in the tire. The tube heavy spot is indicated by a painted yellow stripe about ½ inch wide by 2 inches long. Align the stripe on the tube with the tire red balance dot. If the tube has no balance mark, align the tube valve with the tire red balance dot. (c) Position the tire on the outer wheel half subassembly (2), inserting the valve stem through the valve hole in the wheel. (d) Place the inner wheel half subassembly (1) inside the tire, aligning the bolt holes. (e) Install the brake disc (3) in the inner wheel half aligning the bolt holes. (f) Install the three bolts (8) through the brake disc. NOTE: The washers (9) and nuts (10) must be located on the outer wheel half. (g) Compress the wheel halves and install a washer and nut on each of the three bolts. Run the nuts down by hand as far as possible. CAUTION: DO NOT USE IMPACT OR POWER WRENCHES TO TORQUE THE WHEEL NUTS AND BOLTS. THE USE OF IMPACT OR POWER WRENCHES CAN CAUSE OVER TIGHTENING. NOTE: The fasteners must be tightened by applying the torque to the nut while holding the bolt head. (h) Final torque the nuts to 150 lb-in (16.9 N-m). SERVICE BULLETIN Initial Release 08-14-2015 Rev. B, 01-25-2016 SB7106 Page 15 of 17 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS (i) Install the following in each wheel half subassembly:  For the 40-83 and 40-83A: bearing cone (4), grease seal felt (5A) and rings (6), snap ring (7).  For the 40-83B: bearing cone (4), molded grease seal (5), snap ring (7). NOTE: Install the end of the snap ring into the groove in the hub of the wheel half and wind or spiral the ring into the groove. Figure 10 Wheel assembly components SERVICE BULLETIN SB7106 Page 16 of 17 Initial Release 08-14-2015 Rev. B, 01-25-2016 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS G. INSTALL THE WHEEL ASSEMBLY ON THE AXLE (1) Install the wheel/tire unit on the axle making certain that the bearing cones are seated. (2) Install the axle hardware in accordance with the airframe manufacturer’s manual. (3) Inflate the tire to the required service pressure. H. RE-ATTACH THE BACK PLATE ASSEMBLIES Refer to Figure 11. (1) Install four bolts and washers into the cylinder assembly. (2) Slide the two back plate assemblies between the brake disc and the wheel flange. (3) Thread two bolts into each back plate assembly and tighten the bolts to the torque listed on the brake assembly nameplate: Figure 11 Re-attach the back plate assemblies SERVICE BULLETIN Initial Release 08-14-2015 Rev. B, 01-25-2016 SB7106 Page 17 of 17 40-83, 40-83A, 40-83B – WHEEL HALVES – INSPECT WEAR LIMITS 3. MATERIAL INFORMATION A. MATERIAL-REQUIREMENTS Contact Parker Hannifin for replacement parts availability. Parker Hannifin Corporation Aircraft Wheel & Brake Division Technical Service Hotline: 1-800-BRAKING Customer Support Fax: 440-937-5409 E-mail: clevelandwbhelp@parker.com B. LIST OF COMPONENTS Not applicable. C. INTERCHANGEABILITY None. D. PARTS DISPOSITION Not applicable.