A REGAL-BELOIT Company

1 A REGAL-BELOIT CompanyINSTALLATION INSTRUCTIONSRICHMOND GEAR INSTALLATIONINSTRUCTION VIDEOIt is our strong recommendation that you read this set ofinstructions very carefully before beginning the actual gearset installation, since no gear set can be expected to with-stand the abuse of performance applications if not careful-ly and properly installed. An extra ten minute at this pointcould spell the difference in regard to safety and extended gear a prematurely failed gear set. Don trush the installation! It can be a foolish waste of RICHMOND GEAR INSTALLATION INSTRUCTIONVIDEO is designed for you to see how to properly installring and pinion gear covered in this video include.

2 American Motors Chevrolet 10 bolt 1955-1964 Chrysler and Corvette 1955-1962 Corvette 1963 - present Dana 28-44-60 Ford 8 -9 GM 10 Bolt GM 12 Bolt car and truck Oldsmobileand Pontiac 1957-1964 ToyotaAvailable through your local RICHMOND GEAR RATIO BEFORE ASSEMBLYSTEP the gears to be replaced and thoroughlyclean both the gear carrier and housing with solvent toremove any gear/bearing residue, which could lead toabrasive failure of the new gear set. After cleaning, dry-wipe (or air-dry) all disassembled parts, housings, the ring gear mounting surface for nicksor burrs which might prevent total landing of the newlyinstalled ring gear.

3 Ring/pinion tooth depth variationscan result from a ring gear that is cocked on its mounting surface. If a ring gear spacer is to be used,also check it for similar surface imperfections, dressingthese with block backed pieces of grit paper or a smallfile. Following material removal (from ANY part of theassembly), bathe the pieces in the solvent and wipe : Spacers not normally recommendedSTEP the illustrations provided with these instruc-tions. Familiarize yourself with the terms backlash and pinion depth (sometimes called checking distance).Each set of gears is a matched pair which has been prerun on a gear test machine.

4 Consequently, the pairshould never be mixed with other rings or pinions, Also,since all gear sets have been run-checked, specific settings are supplied with each ring/pinion pair. Thesespecifications vary from set to set. Backlash settings aremarked on the outside diameter face of the ring gear asfollows (see illustration A): Ref: , which means abacklash figure of .008 inch at the closest point. Piniondepth settings (or checking distance) are marked on theface of the pinion gear as follows (see illustration B):Ref: CD , which means distance of inchesfrom centerline of the ring gear to pinion variations for backlash SHOULD NOTEXCEED.

5 004 : If backlash is .008,the backlash -- including maximum variation -- should BLocation of checkingdistance (piniondepth) & serial pinionLocation ofbacklashdimension & gear serial ring gearIllustration ASTEP installing the pinion gear you must check itsdepth in the housing as per the pinion depth or subtract pinion depth shims to arrive at thechecking distance etched on the surface of the pinionface. (See illustration C.). Refer to Helpful Hints &Additions to Richmond Gear Installation Instructions onpages 3 and a mew crush collar or preload shim pack,set the pinion rotating torque to 10-15 (used bearings)20-25 (new bearings) inch pounds.

6 For oval track applications when not using a cooling pump, set at 16-17 inch pounds on new bearings and 10 inch poundsmaximum on used correct installation of the pinion gear, position the ring gear and check for backlash. Mount amagnetic-base dial indicator on the axle housing in sucha way that the indicator plunger will be moving in a linethat is tangent to rotation of the ring gear. This will provide you with a backlash reading which should conform to the figure etched on the side of the ring , maintain a tolerance of .004 variation. Example:If backlash is .008, the backlash - including maximumvariation - should be.

7 (Backlash is alwaysmeasured in 3 or more places equally spaced around inthe ring gear.) Note: For oval track racing set BL atapproximately . for variations in this setting can bemade by side-adjustment of the ring gear. Adjustingrings or side-shim packs can be changed to bring thebacklash and rotating torque figures into tolerance. (Usesame torque on gear bearings as on pinion bearings.)You are now ready to check the tooth contact pattern toassure that no accidental departures from the factory-marked specifications have been made. Apply a thincoat of RICHMOND GEAR compound ( Part # 55-0001-1 ) on gear teeth for best results.

8 Tooth contact patternsshould comply with those shown on next page. (Noterounded or bullet nose shape at heel end of pattern onGear drive sides). See page 4 for patterns and additionalinstallation the pattern is not in those approximate positions, resetthe pinion depth and reset gear backlash until the patterns are closer to the above diagram. Pinion and/orgear should not be adjusted to try to achieve a deeperpattern. The length of the pattern may vary with theamount of the load applied during the check satisfactory pattern results cannot be obtained after areasonable adjustment, return the gear set to RICHMOND GEAR for evaluation.

9 An accurate evaluationcan not be obtained on a used the gear case with sufficient amount of RICHMOND GEAR 75-140 Synthetic Gear Lube withGL 6 rating, or better and maintain the proper level at alltimes. Proper maintenance is a must to protect yoursafety and working life of your gear set. Check oil levelbetween scheduled oil change to insure that proper oillevel is maintained. Inspect vent plug to insure it is cleanand operating. Inspect oil leakage, excessive heating, orany unusual noise or vibration. Note: For oval track racing,add 2 to 3 additional pts. gear GEAR OILC hecking DistancePlace shims, neededto get the requiredpinion depth, inthese locationsChecking Distance Ford - 8 and 9 Place shims, neededto get the requiredpinion depth, at pinion supportIllustration C75-140 Synthetic with Limited Slip Additive1 Quart / LiterINSTALLATION INSTRUCTIONS2 INSTALLATION INSTRUCTIONS FINAL RESULTSP roperly designed, manufactured, and maintained RICH-MOND GEAR gears, correctly assembled by you in a cleanrigid gear box, and operated with the proper lubricant,should result in safe and satisfactory performance.

10 Be sureyou select the proper application for your gear questions concerning these installation instructionsmust be forwarded to us for clarification at the followingaddress:RICHMOND 238, Old Norris RoadLiberty, South Carolina 29657 TechLine: 864-843-9275 Email: is limited to material and/or workmanship defectat time of shipment from the factory, and in no event shall seller have any liability for consequential damages of anykind resulting from a breach of this warranty. This warrantywill be void on all products that show evidence of misapplication, improper installation, abuse, lack of propermaintenance, negligence, or alteration from originaldesign.