CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212

2. Cleaning Nose Wheel on Aircraft 301 3. Cleaning Nose Wheel Disassembled for Tire Change 301 4. Paint Removal Procedures 302 CHECK 401 1. Check Materials 401 2. General 401 3. Detailed Check 402 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Table of Contents Page 2 of 2 Feb 01/97 Table of Contents Subject Page REPAIR 501 1. Repair Materials 501 2. General Repair Procedures 501 3. Repair of Wheel Halves 502 4. Bearing Cup Removal and Replacement 504 5. Retreating and Repainting Wheel Halves 504 ASSEMBLY 601 1. Assembly Materials 601 2. General Assembly Procedures 601 3. Wheel Balancing 603 STORAGE INSTRUCTIONS 701 ILLUSTRATED PARTS LIST 1001 1. Introduction 1001 2. Parts List 1003 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Introduction Page 1 Feb 01/97 INTRODUCTION This manual is published for the guidance of personnel responsible for the overhaul and/or maintenance of the Parker Hannifin 40-212 Wheel Assembly covered in this publication. The procedures outlined in this manual may be altered if better and/or more economical methods can be employed by the individual facilities. However, alternative procedures must not reduce the efficiency of operation of the assembly. NOTE: All torque values and specified limits or values set by Parker Hannifin Engineering and contained herein must be strictly observed and not deviated from. While Parker Hannifin Corporation represents that the information contained in this manual was current at the time of publication, it is recommended that the user inquire as to the latest revision level in existence before proceeding with overhaul or maintenance operations. This can be accomplished by contacting the Product Support Department of the Aircraft Wheel & Brake Division at the following address or numbers: Parker Hannifin Corporation Aircraft Wheel & Brake Division Attn: Product Support Dept. 1160 Center Road Avon, Ohio 44011 Phone: (216) 937-6211 1-800-272-5464 Fax: (216) 937-5409 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Introduction Page 2 Feb 01/97 TSO NOTICE This assembly carries a “TSO C26c ” marking for commercial transport usage (FAR Part 25), which identifies it as having been fully tested in the laboratory and qualified to applicable FAA (Federal Aviation Administration) requirements and specifications After final certification, substitutions of critical parts or changes of processes or materials are not permitted without requalification of the assembly and resubmittal of the test data to the FAA for approval. FAA regulations subject both Parker Hannifin, Aircraft Wheel & Brake Division and the user to constant surveillance to assure that uncompromising quality assurance material and processing controls are maintained in order to provide replacement parts that are the same as the parts originally certified in the assembly. DATA RIGHTS The unit charge for this manual covers reproduction and handling costs only and does not constitute purchase of the data or design contained herein, nor does it convey to the purchaser any rights, patent or otherwise, to reproduce or manufacture from said data. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Description and Operation Page 1 Feb 01/97 DESCRIPTION AND OPERATION 1. Description and Operation A. The Nose wheel assembly is a 18 x 4.4, Type VII wheel designed for use with a 18 x 4.4, 10 ply, 210 MPH dual deflection, tubeless tire. B. The divided type main wheel facilitates tire installation and removal. C. The two wheel halves are fastened together with 8 ea. 5/16” high strength bolts, washers and self-locking nuts. The wheel halves are machined from AZ81A-T4 cast magnesium. D. An O-ring is installed on the outer wheel half to provide an air seal at the juncture of the wheel halves. An inflation valve assembly is installed in the outer wheel half to inflate and deflate a tubeless tire. E. The wheel assembly rotates on two Timken duo-face tapered roller bearings. The bearings are protected by a molded type lip seal in each hub. The bearing cups are shrink-fitted into the hubs of each wheel half. F. To insure even tire wear, the wheel assembly should be statically balanced to within 2.0 inch-ounces of perfect balance. 2. Handling Procedures A. Strictly observe the deflation and inflation procedures, and the torque and lubtork values specified in this manual. Do not overtighten any bolt, nut, or fitting. B. Handle the wheel bearing cones with extreme care. Many bearing failures can be traced to dropping or mishandling the bearings during maintenance. C. Handle and maintain the wheel halves properly to protect the paint and surface finishes. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Description and Operation Page 2 Feb 01/97 3. Leading Particulars Wheel Size and Type: 18 x 4.4, Type VII Tubeless. Material: AZ81A-T4 Cast Magnesium. Wheel Weight : 10.9 Pounds. Wheel Bolt Nut Torque: 150 Pound-Inches Lubtork. O-Ring Material: Nitrile, Buna N. Bearing Lubricant: MIL -G-81322. Wheel Coatings: Surface Treatment: Dow No. 1 per MIL -M-3171 Primer: per MIL-P-85582B, Type I, Class C2 Paint: per MIL-C-85285B, Type I Color: Untinted White No. 17925 per FED-STD-595 4. Maintenance A. Wheel maintenance shall be performed "on condition", and is limited to the replacement of parts listed in IPL, Figure 1001, plus procedures as specified in the “CLEANING”, “CHECK”, and “REPAIR” sections of this manual. 5. Weight & Balance Information A. Weight of the 40-212 wheel is10.90 lbs. When replacing other equipment, weigh the existing nose wheel to derive the weight increase. Compute weight & balance and make appropriate revisions to the aircraft logbook. 6. Aircraft Applicability A. Per STC Approvals, the 40-212 nose wheel is eligible for use on the following aircraft: Cessna Citation Models 500, 501, 550, 551 & S550 Learjet Models 24, 25, 35, 35A, 36, 36A & 55 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 101 Feb 01/97 T TE ES ST TIIN NG G 1. General Test the Wheel assembly in accordance with the following procedure. (Ref. IPL Fig. 1001) 2. Testing Procedures A. Clean bearing cones (4) in dry cleaning solution, specification P-D-680, and visually check roller contacting surfaces for nicks, scratches, rust, corrosion, spalling, flat spots, pitting, heat discoloration and wear. Check bearing cage for dents or distortion and for wear of sides, corners and at ends of roller pockets. Replace bearing cones having any defects. B. Wipe bearing cups (2) free of grease and visually check cup face for scratches, pitting, brinelling, spalling, heat discoloration, rust, corrosion and wear. Remove defective cups and install new cups per R RE EP PA AIIR R. C. Visually check grease seals (Integral to Bearing Cone) for cuts and wear on rubber sealing lip. Replace Bearing Cone (4) if grease seal is damaged . D. Cover hub openings of wheel halves to prevent contamination of bearing lubricant. E. Place wheel/tire assembly in an inflation cage and inflate to recommended operating pressure. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 102 Feb 01/97 F. Coat juncture around inflation valve (9) and tire beads with soap solution. Check carefully for air leaks in the form of soap bubbles. If air leaks occur around the air valve assembly, check torque on leaking part. If air leaks occur around tire bead seat, completely deflate tire and remove assembly from inflation cage. Remove tire from wheel and examine wheel bead seat and tire for damage. If wheel bead seat is scratched, nicked or pitted, repair in accordance with R RE EP PA AIIR R. G. Place wheel/tire assembly in an inflation cage and inflate to recommended operating pressure, after the initial 24 hours (growth stabilization) reinflate to recommended operating pressure. Check pressure after an additional 24 hours. If the reduction in pressure exceeds five percent of inflation pressure, repeat Step F. All possible sources of air leakage should be rechecked, with particular attention given to all tire surfaces, the wheel bead area, air valve assembly (9), and O-Ring (10). CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 201 Feb 01/97 DISASSEMBLY 1. General Disassemble the Wheel assembly in accordance with the following instructions after removal from aircraft (Ref. IPL Fig. 1001). W WA AR RN NIIN NG G:: D DO O N NO OT T A AT TT TE EM MP PT T T TO O D DIIS SA AS SS SE EM MB BL LE E W WH HE EE EL L U UN NT TIIL L T TIIR RE E H HA AS S B BE EE EN N C CO OM MP PL LE ET TE EL LY Y D DE EF FL LA AT TE ED D;; O OT TH HE ER RW WIIS SE E,, S SE ER RIIO OU US S IIN NJ JU UR RY Y T TO O P PE ER RS SO ON NN NE EL L O OR R D DA AM MA AG GE E T TO O E EQ QU UIIP PM ME EN NT T C CA AN N R RE ES SU UL LT T.. 2. Disassembly Procedures A. Jack aircraft per aircraft maintenance manual until tire is clear of ground and fully deflate tire. B. Remove wheel from aircraft per aircraft maintenance manual. Retain all axle nuts, washers, and spacers (11), plus inner and outer wheel bearing cones (4). C. Assure that wheel assembly is fully deflated, and place on a clean flat surface. N NO OT TE E:: A A S SO OA AP P S SO OL LU UT TIIO ON N A AR RO OU UN ND D T TH HE E B BE EA AD D S SE EA AT T A AR RE EA A W WIIL LL L U US SU UA AL LL LY Y H HE EL LP P IIN N B BR RE EA AK KIIN NG G S ST TU UB BB BO OR RN N B BE EA AD DS S.. C CA AU UT TIIO ON N:: U US SE E O OF F T TIIR RE E IIR RO ON NS S,, S SC CR RE EW WD DR RIIV VE ER RS S,, O OR R O OT TH HE ER R IIN NS ST TR RU UM ME EN NT TS S U US SE ED D T TO O P PR RY Y T TH HE E T TIIR RE E L LO OO OS SE E F FR RO OM M T TH HE E B BE EA AD D S SE EA AT T A AR RE EA A O OF F T TH HE E W WH HE EE EL L M MA AY Y R RE ES SU UL LT T IIN N P PE ER RM MA AN NE EN NT T D DA AM MA AG GE E T TO O T TH HE E W WH HE EE EL L A AN ND D T TIIR RE E.. D. Using a mallet or a portable bead breaker, break tire beads away from both wheel flanges by applying pressure in even increments around entire sidewall as close to tire beads as possible. C CA AU UT TIIO ON N:: D DO O N NO OT T U US SE E IIM MP PA AC CT T O OR R P PO OW WE ER R W WR RE EN NC CH HE ES S T TO O R RE EM MO OV VE E W WH HE EE EL L N NU UT TS S A AN ND D B BO OL LT TS S.. E. Remove nuts (8), washers (7), bolts (5) and countersunk washers (6). F. Separate the wheel halves and remove tire. G. Remove O-Ring (10) from wheel register groove of outer wheel half (3). CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 202 Feb 01/97 N NO OT TE E:: IIT T IIS S R RE EC CO OM MM ME EN ND DE ED D T TH HA AT T A A N NE EW W O O--R RIIN NG G B BE E IIN NS ST TA AL LL LE ED D A AT T E EA AC CH H O OV VE ER RH HA AU UL L.. H. Bearing cups (2) should not be removed from the wheel halves unless replacement is required. Refer to R RE EP PA AIIR R for removal and installation procedures. N NO OT TE E:: T TH HE E IIN NF FL LA AT TIIO ON N V VA AL LV VE E A AN ND D T TH HE E B BE EA AR RIIN NG G C CU UP PS S M MU US ST T B BE E R RE EM MO OV VE ED D IIF F P PA AIIN NT T IIS S T TO O B BE E S ST TR RIIP PP PE ED D F FR RO OM M T TH HE E W WH HE EE EL L H HA AL LV VE ES S.. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 301 Feb 01/97 CLEANING 1. Cleaning Materials NOTE: EQUIVALENT SUBSTITUTES MAY BE USED FOR ITEMS LISTED BELOW. Equipment/Material Supplier Dry Cleaning Solution Specification P-D-680 Stoddard Solvent Commercially Available Isopropyl Alcohol Commercially Available Soft Bristle Brush Commercially Available Clean Wiping Cloth Commercially Available 2. Cleaning Nose Wheel on Aircraft A. The wheel can be cleaned while on the aircraft with either steam, hot water, or comercially available solvent. Avoid high pressure contact of liquid to bearing seal and hub area of the wheel. W WA AR RN NIIN NG G:: C CL LE EA AN NIIN NG G S SO OL LU UT TIIO ON NS S S SH HO OU UL LD D B BE E U US SE ED D IIN N A A W WE EL LL L V VE EN NT TIIL LA AT TE ED D A AR RE EA A.. A AV VO OIID D P PR RO OL LO ON NG GE ED D IIN NH HA AL LA AT TIIO ON N O OF F F FU UM ME ES S.. B. A soft bristle brush may be used to remove hardened grease, dust or dirt thsat has accumulated. C. Immediately after cleaning, dry wheels thoroughly using a clean wiping cloth, or dry, filtered compressed air. 3. Cleaning Nose Wheel Disassembled for Tire Change W WA AR RN NIIN NG G:: C CL LE EA AN NIIN NG G S SO OL LU UT TIIO ON NS S S SH HO OU UL LD D B BE E U US SE ED D IIN N A A W WE EL LL L V VE EN NT TIIL LA AT TE ED D A AR RE EA A.. A AV VO OIID D P PR RO OL LO ON NG GE ED D IIN NH HA AL LA AT TIIO ON N O OF F F FU UM ME ES S.. A. Clean all metal parts by immersing in dry cleaning solution conforming to specification P- D-680. Use a soft bristle brush to remove hardened grease, dust, and dirt. C CA AU UT TIIO ON N:: C CL LE EA AN N B BE EA AR RIIN NG G C CO ON NE ES S ((4 4)) C CA AR RE EF FU UL LL LY Y IIN N A A S SE EP PA AR RA AT TE E C CO ON NT TA AIIN NE ER R O OF F C CL LE EA AN N S SO OL LV VE EN NT T T TO O A AV VO OIID D C CO ON NT TA AM MIIN NA AT TIIO ON N.. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 302 Feb 01/97 B. Dry all metal parts thoroughly after cleaning, using filtered and dried compressed air. C. Dry bearing cones thoroughly, using filtered and dried compressed air. Repack bearing cones with clean bearing grease, specification MIL -G-81322, immediately after visually inspecting per CHECK. C CA AU UT TIIO ON N:: D DO O N NO OT T S SP PIIN N B BE EA AR RIIN NG G C CO ON NE ES S W WIIT TH H C CO OM MP PR RE ES SS SE ED D A AIIR R.. D. Clean rubber parts in isopropyl alcohol and dry with a clean, soft cloth. 4. Paint Removal Procedures A. Remove paint from the wheel halves using chemical paint removal solvents or plastic media stripping in accordance with the following instructions. W WA AR RN NIIN NG G:: D DU UE E T TO O T TH HE E T TO OX XIIC CIIT TY Y O OF F C CH HE EM MIIC CA AL L P PA AIIN NT T R RE EM MO OV VA AL L S SO OL LV VE EN NT TS S,, IIT T IIS S H HIIG GH HL LY Y R RE EC CO OM MM ME EN ND DE ED D T TH HA AT T P PA AIIN NT T R RE EM MO OV VA AL L B BY Y T TH HIIS S M ME ET TH HO OD D B BE E A AC CC CO OM MP PL LIIS SH HE ED D B BY Y A A C CO OM MM ME ER RC CIIA AL L F FA AC CIIL LIIT TY Y W WIIT TH H T TH HE E P PR RO OP PE ER R E EQ QU UIIP PM ME EN NT T A AN ND D C CH HE EM MIIC CA AL L D DIIS SP PO OS SA AL L C CA AP PA AB BIIL LIIT TIIE ES S.. C CA AU UT TIIO ON N:: R RE EF FE ER R T TO O T TH HE E A AP PP PL LIIC CA AB BL LE E M MA AN NU UF FA AC CT TU UR RE ER RS S IIN NS ST TR RU UC CT TIIO ON NS S W WH HE EN N U UT TIIL LIIZ ZIIN NG G C CH HE EM MIIC CA AL L P PA AIIN NT T R RE EM MO OV VA AL L S SO OL LV VE EN NT TS S O OR R P PL LA AS ST TIIC C M ME ED DIIA A S ST TR RIIP PP PIIN NG G E EQ QU UIIP PM ME EN NT T.. B. Completely disassemble the wheel prior to paint removal. Remove inflation valve (9). N NO OT TE E:: R RE EF FE ER R T TO O ""R RE EP PA AIIR R"" F FO OR R R RE ET TR RE EA AT TIIN NG G A AN ND D R RE EP PA AIIN NT TIIN NG G W WH HE EE EL L.. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 401 Feb 01/97 CHECK 1. Check Materials NOTE: EQUIVALENT SUBSTITUTES MAY BE USED FOR ITEMS LISTED BELOW: Type Penetrant Developer Supplier Fluorescent Zyglo ZL-16 Zyglo ZP-13 (wet) optional Penetrex ZL-2A with emulsifier ZE-4 Penetrex ZP-4 (dry) or ZP-13 optional Magnaflux Corp. 7300 West Lawrence Ave. Chicago, IL. 60656 Red Dye Spot Check Spot Check Dy-Chek Dy-Chek Turco Products Division of Purex Corp. P.O. Box 6200 Carson, CA 90749 Met-L-Chek Met-L-Chek Met-L-Chek Company 1639 Euclid Street Santa Monica, CA 90404 2. General (Ref. IPL Fig. 1001) A. Check all parts for cracks, wear, structural damage, corrosion, and damaged threads. Replace all parts that show evidence of cracks, excessive wear, and structural and thread damage. Repair minor scratches and corrosion. Check specific parts in accordance with the following instructions (Ref. IPL Fig. 1001). CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 402 Feb 01/97 3. Detailed Check (Requires stripping topcoat and primer) A. Check wheel halves (1 and 3) for cracks and structural damage. Take particular note of bead seat and valve areas. Check the underside of the wheel tubewell area paying particular attention to the critical area from the tire bead seat radius to the end of the toe of the tire. Check the valve port for stripped threads. Replace wheel half if evidence of cracks or stripped threads exist. Penetrant inspection of wheel halves is recommended at the following intervals: * First inspection after 5th tire change or 2000 cycles, whichever comes first (one cycle is defined as one take-off and one landing). * Additional inspections should be performed at every second tire change or 1000 cycles, whichever comes first. N NO OT TE E:: C CH HE EC CK K W WH HE EE EL L B BY Y Z ZY YG GL LO O O OR R O OT TH HE ER R D DY YE E--P PE EN NE ET TR RA AN NT T M ME ET TH HO OD DS S.. R RE EP PL LA AC CE E A AL LL L C CR RA AC CK KE ED D W WH HE EE EL LS S.. B. Check carefully for corrosion on the surfaces that contact the tire beads. Remove corrosion and repair surface damage to the limits defined in R RE EP PA AIIR R.. C. Check bearing cups (2) in the wheel halves for looseness, wear, corrosion, spalling, brinelling, scratches, pitting, and heat discoloration. Replace defective bearing cups in accordance with R RE EP PA AIIR R.. D. Check roller surfaces of bearing cones (4) for wear, corrosion, spalling, scratches, pitting, and heat discoloration. Check bearing cage for nicks, dents, distortion, and wear in the roller pockets. Replace bearing cones having any of the above defects. E. Check self-locking nuts (8) for worn, stripped or crossed threads. Replace if any of the above damage exists. Check the nuts self-locking feature. Replace the nut when it can be run down with the fingers after the locking feature engages the bolt. F. Magnetic particle inspect or penetrant inspect the wheel tie bolts (5) for cracks, particularly in the areas near the bolt head radius and the threads. If any of the bolts have cracks, replace all of the bolts. See Page 401 for recommended penetrant and developer. G. New O-Rings should be installed at each overhaul. Remove burrs or other damage on the adjoining wheel components that could cause O-Ring damage. H. Examine grease seals (Integral to bearing cone) for cuts, nicks, distortion, and other damage. Check the integrity of the rubber-to-metal interface. Replace bearing cone (4) if seals have any of these defects. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 501 Feb 01/97 REPAIR 1. Repair Materials NOTE: EQUIVALENT SUBSTITUTES MAY BE USED FOR ITEMS LISTED BELOW: Equipment/Material Supplier Aluminum Oxide Cloth (400 Grit Wet or Dry) Commercially Available Dry Cleaning Solvent Specification P-D-680 Commercially Available Surface Treatment (Dow #1) per Specification MIL-M-3171 Commercially Available Primer per Specification MIL-P-85582B, Type I, Class C2 Commercially Available Topcoat per Specification MIL-C-85285B, Type I Untinted White FED-STD-595 Color No. 17925 Commercially Available O-ring Lubricant Dow Molykote 55M Grease Dow Corning Corp. Box 1767 Midland, Michigan 48640 2. General Repair Procedures Repair of the Wheel is limited to the replacement of damaged parts and to the specific repairs listed in this section. ( Ref. IPL Fig. 1001) A. Repairs to the main wheel are limited to the replacement of parts and to the repairs specified in this section. No attempt should be made to repair cracked, severely corroded or badly damaged parts. C CA AU UT TIIO ON N:: R RE EM MO OV VA AL L O OF F C CO OR RR RO OS SIIO ON N A AN ND D S SU UR RF FA AC CE E D DA AM MA AG GE E W WIIL LL L P PR RE EV VE EN NT T S ST TR RE ES SS S C CO ON NC CE EN NT TR RA AT TIIO ON NS S A AN ND D P PR RE EM MA AT TU UR RE E W WH HE EE EL L F FA AIIL LU UR RE E.. A AN NY Y E EX XC CE ES SS SIIV VE E R RE EM MO OV VA AL L O OF F M MA AT TE ER RIIA AL L W WIIL LL L S SH HO OR RT TE EN N T TH HE E R RO OL LL L L LIIF FE E O OF F T TH HE E W WH HE EE EL L;; T TH HE ER RE EF FO OR RE E IIT T IIS S R RE EC CO OM MM ME EN ND DE ED D T TH HA AT T M MA AT TE ER RIIA AL L R RE EM MO OV VE ED D B BY Y B BL LE EN ND DIIN NG G B BE E L LIIM MIIT TE ED D T TO O T TH HE E M MIIN NIIM MU UM M R RE EQ QU UIIR RE ED D F FO OR R R RE EM MO OV VIIN NG G C CO OR RR RO OS SIIO ON N O OR R S SU UR RF FA AC CE E D DA AM MA AG GE E.. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 502 Feb 01/97 3. Repair of Wheel Halves (1 and 3, Ref. Figure 501) A. Remove all corrosion and surface damage from wheel halves according to limits specified in the following paragraphs and defined in Figure 501. Use fine, wet-or-dry, aluminum oxide cloth for polishing. Unless otherwise specified, surface finish of repaired surfaces should not exceed a roughness of 150 rms. W WA AR RN NIIN NG G:: D DO O N NO OT T U US SE E A AB BR RA AS SIIV VE ES S C CO ON NT TA AIIN NIIN NG G IIR RO ON N S SU UC CH H A AS S S ST TE EE EL L W WO OO OL L,, IIR RO ON N O OX XIID DE E,, O OR R S ST TE EE EL L W WIIR RE E;; IIR RO ON N P PA AR RT TIIC CL LE ES S W WH HIIC CH H B BE EC CO OM ME E E EM MB BE ED DD DE ED D IIN N T TH HE E A AL LU UM MIIN NU UM M W WH HE EE EL L H HA AL LV VE ES S W WIIL LL L A AC CC CE EL LE ER RA AT TE E C CO OR RR RO OS SIIO ON N.. B. In area 1, polish out corrosion pits, scratches, and tool marks to .015 inch deep and .5 inch long. Surface finish in bead seat radius should be 20 microinches rms. C. In area 2, blend out and polish imperfections to .030 inch deep and 1 inch long. Reworked area is not to exceed 1 square inch. Do not remove metal if surface directly opposite was previously reworked. D. In area 3, blend out and polish imperfections to .030 inch deep and one square inch area. E. In area 4, polish out imperfections to .010 inch maximum depth in register area, provided sealing qualities are maintained. F. In area 5, blend out and polish imperfections to .030 inch deep and one square inch in area. G. In area 6, rework is limited to .040 inch deep and .5 square inch in area at a maximum of two places. H. In area 7, rework is limited to blending out scratches and corrosion, provided bearing cup retention is not affected. I. In area 8, rework is limited to .010 inch maximum depth on face of each bolt boss. J. In area 9, the maximum repair is .010 inch deep and one-half square inch on each interface boss. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 503 Feb 01/97 O Ou utte err W Wh he ee ell H Ha allff IIn nn ne err W Wh he ee ell H Ha allff N NO OT TE E:: N NU UM MB BE ER RS S R RE EF FE ER R T TO O R RE EW WO OR RK KE ED D A AR RE EA AS S D DIIS SC CU US SS SE ED D IIN N R RE EP PA AIIR R O OF F W WH HE EE EL L H HA AL LF F W Wh he ee ell R Re ep pa aiirr L Liim miitts s F Fiig gu urre e 5 50 01 1 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 504 Feb 01/97 4. Bearing Cup Removal and Replacement A. Heat wheel half in an oven not exceeding 175o F. for 30 minutes. B. Remove cup from bore by tapping it out evenly with a fiber or phenolic punch, or fabricate bearing cup removal tool (See Figure 502) and utilize by hand or adapt to arbor press. Exercise extreme care to avoid raising burrs in the hub bore. W WA AR RN NIIN NG G:: D DU UR RIIN NG G B BE EA AR RIIN NG G C CU UP P R RE EM MO OV VA AL L,, A AL LW WA AY YS S S SU UP PP PO OR RT T T TH HE E W WH HE EE EL L H HA AL LF F O ON N T TH HE E H HU UB B,, N NO OT T O ON N T TH HE E F FL LA AN NG GE E.. F FA AIIL LU UR RE E T TO O D DO O S SO O C CO OU UL LD D D DA AM MA AG GE E T TH HE E F FL LA AN NG GE E.. C. Make sure that bearing bore and shoulder are clean and free of burrs. D. Prior to installation, chill the new bearing cup with dry ice. E. Heat wheel half in oven not exceeding 175o F. for 30 minutes. F. Remove the wheel half from the heat source and remove the bearing cup from the dry ice. Dry the cup thoroughly. G. Brush a wet coat (generous but not dripping) of primer into the bearing bore. H. Hand press the bearing cup into the coated housing making sure the backing surface of the cup mates to the shoulder of the bearing bore. Avoid cocking the cup during installation. (Installation tool for cup is pictured in Figure 502) I. Remove excess primer compound with a clean shop towel so that a fillet of not more than .08 wide extends beyond the cup. 5. Retreating and Repainting Wheel Halves A. Rinse reworked areas with dry-cleaning solution, specification P-D-680 and dry thoroughly with filtered compressed air. W WA AR RN NIIN NG G:: C CL LE EA AN NIIN NG G S SO OL LU UT TIIO ON NS S S SH HO OU UL LD D B BE E U US SE ED D IIN N A A W WE EL LL L V VE EN NT TIIL LA AT TE ED D A AR RE EA A.. A AV VO OIID D P PR RO OL LO ON NG GE ED D IIN NH HA AL LA AT TIIO ON N O OF F F FU UM ME ES S.. B. Treat reworked areas per MIL -M-3171, Type III, VI, or VII. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 505 Feb 01/97 C. Apply primer to reworked areas. The dry film thickness shall be .0002 to .0005 inch. C CA AU UT TIIO ON N:: D DO O N NO OT T G GE ET T P PA AIIN NT T O ON N R RO OL LL LE ER R C CO ON NT TA AC CT TIIN NG G S SU UR RF FA AC CE ES S O OF F B BE EA AR RIIN NG G C CU UP PS S.. P PA AIIN NT T O ON N T TH HE ES SE E S SU UR RF FA AC CE ES S W WIIL LL L C CO ON NT TR RIIB BU UT TE E T TO O B BE EA AR RIIN NG G F FA AIIL LU UR RE E ((S SE EE E F FIIG GU UR RE E 5 50 02 2)).. D. Apply topcoat to reworked areas. The dry film thickness shall be .0008 to .0014 inch, including primer. Bearing Cup Removal and Installation Figure 502 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 506 Feb 01/97 THIS PAGE INTENTIONALLY LEFT BLANK CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 601 Feb 01/97 A AS SS SE EM MB BL LY Y 1. Assembly Materials NOTE: EQUIVALENT SUBSTITUTES MAY BE USED FOR ITEMS LISTED BELOW. Equipment/Material Supplier Aeroshell Grease 22 (MIL-G-81322 Grade A) Shell Oil Company Houston, TX. Antiseize Compound (Lubtork) Specification MIL-T-5544 W.J. Ruscoe & Company 483 Kenmore Boulevard Akron, Ohio 44301 Isopropyl Alcohol Commercially Available Dow Corning 55 O-ring Lubricant Compound Dow Corning Corp. Box 1767 Midland, Michigan 48640 2. General Assembly Procedures Assemble the Wheel assembly in accordance with the following procedures (Ref. IPL Fig. 1001): CAUTION: IN ORDER TO PROPERLY ASSEMBLE THE WHEEL TO TIRE, SPECIAL TOOLS ARE REQUIRED. TO PREVENT DAMAGE TO WHEEL COMPONENTS, AN AUTHORIZED WHEEL & TIRE SHOP SHOULD ASSEMBLE AND DISASSEMBLE THE WHEEL. A. Prior to installing wheel to tire, inspect tire, with special emphasis placed on bead area. Be sure that the tire is free of any foreign material and that the bead areas are clean. Also, be sure that the word “tubeless” appears on the tire sidewall. B. Place inner wheel half assembly on a clean flat surface with register side up. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 602 Feb 01/97 C. New O-Rings should be installed at each reassembly. Lubricate O-ring (10) with a coat of Dow Corning Molykote 55M grease or MIL -G-81322 grease, and install on register portion of inner wheel half. CAUTION: SEAL SHOULD NOT BE TWISTED BUT FULLY ALIGNED IN GROOVE. NOTE: PRIOR TO PLACING TIRE OVER WHEEL HALVES, A TIRE TALC OR SOAP SOLUTION MAY BE USED ON THE BEAD SEAT AREA OF THE TIRE, IF DESIRED, TO AID IN SEATING THE TIRE ON THE WHEEL. D. Place tire over inner wheel half assembly with red balance dot on tire side wall up, and aligned with a point midway betweenany two wheel bolt holes. E. Place outer wheel half assembly in tire, making sure to properly align male and female registers. Outer wheel half assembly should be aligned so that the air valve lines up with red dot on tire sidewall. NOTE: IN ORDER TO ATTAIN WHEEL BALANCE, IT MAY BE NECESSARY TO ROTATE WHEEL HALVES 180°. THIS SHOULD BE ATTEMPTED IF BALANCE IS MORE THAN 1/2 INCH-OUNCES OUT. F. Lubricate threads of tie bolts (5) and self-locking nuts (8), surfaces of washers (6 & 7) with antisieze compound. Always clean paint from bolt threads, nuts and washers prior to applying antisieze compound. CAUTION: INSTALL COUNTERSUNK WASHERS (6) UNDER BOLT HEAD WITH COUNTERSUNK SIDE OF WASHER TOWARD THE BOLT HEAD. FAILURE TO DO SO MAY RESULT IN BOLT FAILURE. G. Compress wheel halves together and install bolts (5), countersunk washers (6), plain washers (7), and nuts (8). CAUTION: DO NOT USE IMPACT OR POWER WRENCHES TO TIGHTEN NUTS OR BOLTS. H. Draw nuts up evenly in a criss-cross pattern at equal increments of 35 in-lbs., until wheel halves are seated. Then retighten until a final lubtork value of 150 in-lbs. is obtained. Always torque nuts a second time, because sometimes O-ring compression will give a false initial reading. I. Install valve core into valve stem. Install air valve assembly (9) into outer wheel half assembly and dry torque to 50-60 in-lbs. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 603 Feb 01/97 WARNING: OVERINFLATION OF TIRES FROM HIGH PRESSURE SOURCES MAY RESULT IN WHEEL FAILURE, CAUSING PERSONAL INJURY. ALWAYS USE SAFETY EQUIPMENT DESIGNED FOR THIS OPERATION. J. Place the wheel/tire assembly in an inflation cage for initial inflation. Inflate tire just enough to seat the beads. Reduce tire pressure to recommended storage pressure (40 psi) and remove wheel/tire assembly from inflation cage. W WA AR RN NIIN NG G:: D DO O N NO OT T IIN NF FL LA AT TE E T TIIR RE E T TO O F FU UL LL L O OP PE ER RA AT TIIN NG G P PR RE ES SS SU UR RE E U UN NT TIIL L T TH HE E W WH HE EE EL L A AS SS SE EM MB BL LY Y H HA AS S B BE EE EN N M MO OU UN NT TE ED D O ON N A AIIR RC CR RA AF FT T.. K. Pack bearing cones (4) with clean bearing grease, specification MIL -G-81322. L. Install valve cap on valve stem. M. Check assembly for balance per following Section 3. 3. Wheel Balancing Parker Hannifin recommends that all wheel and tire assemblies be balanced. A. Checking Static Balance: 1. Wheel balancing kit 199-135 is available from Parker Hannifin Corp. to statically balance the 40-212 nose wheel assembly. Kit 199-135 uses flush mounted 1/2 ounce weights against the wheel under the heads of the wheel tie bolts (5) in place of the countersunk washers (6), and under the nuts (9) in place of the plain washers (7). See Figures 601 & 602 for weight locations. 2. Alternate methods of balancing can be accomplished by using other approved industry standard methods and weights. 3. Record the amount of weight required to center the bubble, as well as the position and pattern by making a sketch showing the location of the weights relative to the valve stem and bolt pattern. 4. Multiply the amount of weight required to center the bubble by 4.25 inches to obtain the out-of-balance in inch-ounces. NOTE: IF THE OUT-OF-BALANCE CONDITION IS MORE THAN 2.0 INCH- OUNCES, THEN BALANCE WEIGHTS MUST BE PERMANENTLY INSTALLED ON THE WHEEL AND TIRE ASSEMBLY. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 604 Feb 01/97 Nose Wheel Balancing Weights Figure 601 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 605 Feb 01/97 Example of Balance Weight Location Figure 602 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 606 Feb 01/97 B. Installing Balance Weights: 1. Remove the wheel and tire assembly from the wheel balancer and cover the hub openings. 2. Place the wheel and tire assembly on a clean, flat surface and deflate the tire completely by removing the valve core. 3. Before loosening wheel bolts, note the position of the tire relative to the wheel by placing a small strip of tape radially on the wheel in relation to the red balance dot that is vulcanized in the sidewall of the tire. 4. After double checking to make sure that the tire has been fully deflated, loosen the wheel nuts (8) in a criss-cross pattern and remove only the wheel bolt or bolts (5) where the balance weights are to be installed. 5. Discard the plain washers (7) and countersunk washers (6) at these bolt locations. CAUTION: CARE SHOULD BE TAKEN TO INSURE THAT THE PROTECTIVE FINISH ON THE WHEEL IS NOT NICKED OR SCRATCHED WHILE REMOVING BOLTS. ALSO, IMPACT OR POWER WRENCHES SHOULD NOT BE USED TO REMOVE THE WHEEL BOLT AND NUTS. 6. To install balance weights provided in kit 199-135, discard the plain and countersunk washers (6 & 7), and replace with the pairs of balance weights selected in Paragragh 1. under “Checking Static Balance”. 7. Next, lubricate the bolt and nut threads and the bearing surfaces of the bolt head, nut, and balance weights, with antiseize compound. CAUTION: BE SURE TO ADD BALANCE WEIGHTS OF EQUAL WEIGHT AS SHOWN IN FIGURE 602. THE BALANCE WEIGHTS MUST BE ADDED EQUALLY TO EACH SIDE OF THE WHEEL ASSEMBLY, EXCEPT AS NOTED. 8. Replace the bolts and nuts into the wheel assembly, with balance weights in place. CAUTION: INSTALL BALANCE WEIGHTS UNDER BOLT HEAD WITH COUNTERSUNK SIDE OF BALANCE WEIGHT TOWARD THE BOLT HEAD. FAILURE TO DO SO MAY RESULT IN BOLT FAILURE. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 607 Feb 01/97 9. Remove, lubricate, and reinstall the remaining wheel tie bolts one position at a time. CAUTION: INSTALL COUNTERSUNK WASHERS (6) UNDER BOLT HEAD WITH COUNTERSUNK SIDE OF WASHER TOWARD THE BOLT HEAD. FAILURE TO DO SO MAY RESULT IN BOLT FAILURE. 10. Draw nuts up evenly in a criss-cross pattern at equal increments of 35 in-lbs., until wheel halves are seated. Then retighten until a final lubtork value of 150 in-lbs. is obtained. Always torque nuts a second time, because sometimes O-ring compression will give a false initial reading. 11. Align the tape applied on the wheel per paragragh 3 to the red dot on the tire sidewall.. 12. Install valve core into valve stem. WARNING: OVERINFLATION OF TIRES FROM HIGH PRESSURE SOURCES MAY RESULT IN WHEEL FAILURE, CAUSING PERSONAL INJURY. ALWAYS USE SAFETY EQUIPMENT DESIGNED FOR THIS OPERATION. 13. Place the wheel/tire assembly in an inflation cage for initial inflation. Inflate tire just enough to seat the beads. Reduce tire pressure to recommended storage pressure (40 psi) and remove wheel/tire assembly from inflation cage. W WA AR RN NIIN NG G:: D DO O N NO OT T IIN NF FL LA AT TE E T TIIR RE E T TO O F FU UL LL L O OP PE ER RA AT TIIN NG G P PR RE ES SS SU UR RE E U UN NT TIIL L T TH HE E W WH HE EE EL L A AS SS SE EM MB BL LY Y H HA AS S B BE EE EN N M MO OU UN NT TE ED D O ON N A AIIR RC CR RA AF FT T.. 14. Place the wheel and tire asembly back onto the static balancer to verify that the balance is correct. 15. Remove from balancer, and place in storage, or install on aircraft as required. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 608 Feb 01/97 THIS PAGE INTENTIONALLY LEFT BLANK CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 701 Feb 01/97 S ST TO OR RA AG GE E IIN NS ST TR RU UC CT TIIO ON NS S 1. Wheels Stored with Tires Installed A. The length of time that a wheel assembly can be stored is governed by the storage life of its rubber components. B. The wheel/tire assembly should be stored in a clean, cool, dry storeroom out of direct sunlight. The desirable storeroom temperature range is 32o - 75o F. If this temperature range cannot be maintained, temperatures as high as 100o F. or even 125o F. can be tolerated for short periods. C. The recommended storage pressure for tires is 40 psi. 2. Wheels Stored Without Tires Installed A. Store without the O-Ring (10) installed between the two halves. 3. Plug Or Cover Bearing Hub Area During Storage To Prevent Contamination. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 702 Feb 01/97 THIS PAGE INTENTIONALLY LEFT BLANK CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 1001 Feb 01/97 IIL LL LU US ST TR RA AT TE ED D P PA AR RT TS S L LIIS ST T 1. Introduction A. The Illustrated Parts List (IPL) section lists and illustrates the procurable parts of the Parker Hannifin assembly covered in this publication. The components are listed in the order of disassembly. B. The Figure Item column provides the cross reference between the parts list and IPL Figure 1001. C. The Part Number column gives the part number of the item, which is stamped on the part when practical. This number should be used when ordering parts. D. The Nomenclature column gives the basic noun name of each part, together with any specifications required to identify the part listed. The descriptions are indented under the column heading to show the relationship of the parts to their subassemblies and to the assembly. E. The Units Per Assembly column gives the number of parts required for each assembly or subassembly. CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 1002 Feb 01/97 Illustrated Parts List (IPL) for 40-212 Wheel Assembly Figure 1001 CM40-212 COMPONENT MAINTENANCE MANUAL FOR WHEEL ASSEMBLY 40-212 Aerospace Page 1003 Feb 01/97 2. Parts List FIGURE ITEM PART NUMBER NOMENCLATURE UNITS PER ASSY 40-212 Wheel Assembly 1 161-13400 Inner Wheel Half Assembly 1 1 * Wheel Half - Inner 1 2 214-03700 Cup - Bearing 1 162-12500 Outer Wheel Half Assembly 1 3 * Wheel Half - Outer 1 2 214-03700 Cup - Bearing 1 4 214-03800 Bearing Cone & Seal 2 5 103-23500 Bolt (MS21250-05030) 8 6 095-02800 Washer, Countersunk (MS20002C5) 8 7 095-13600 Washer (MS20002-5) 8 8 094-10401 Nut (MS21045-5S), (alt. AN365-524C) 8 9 160-00700 Air Valve Assemby (TR762-03) 1 10 101-09700 O-Ring (MS28775-269) 1 ** 166-19700 ***Nameplate 1 ** 166-20000 Warning Decal 1 11 067-08800 Axle Spacer 2 * PART NOT PROCURABLE ** PART NOT ILLUSTRATED IN FIGURE 1001 *** WHEN ORDERING REPLACEMENT NAMEPLATE, FURNISH WHEEL MODEL NUMBER AND DATE OF MANUFACTURE (IF KNOWN) 1 Parker Hannifin Corporation Aerospace/Aircraft Wheel & Brake 1160 Center Road Avon, OH 44011 Date: _ _/_ _/20_ _ Subject: Letter of Authorization for Installation of STC’d Conversion Kits To whom it may concern: Parker Hannifin Corporation, Aircraft Wheel & Brake Division, hereby states that the following item(s): KIT NUMBER: 199-___________ FAA APPROVAL: 1) STC # ________________________ NO OTHER APPROVALS NECESSARY AUTHORIZATION TO INSTALL: With the sale of this STC KIT, OWNER of the Supplemental Type Certificate agrees to permit the buyer or buyer’s agent or agency to use the certificate to alter the product under the terms and conditions of this STC. A/C MAKE: ______________________ A/C MODEL______________________ TAIL # __________________________ Regards, Technical Support Team Technical Hotline (800) 272-5464 Clevelandwbhelp@parker.com Web-site: www.clevelandwheelandbrake.com Manufacturer of Cleveland Wheels & Brakes