Wheel end bearing and seal installation guide
Contents
1. Remove and discard the steering knuckle seal Select a replacement correct for the application Refer to the SKF Passenger Car Light and Medium Truck Seals and Bearings Catalog SKF 457205 11 General Motors Position new Seal in bore fig 31 Ford Grip and remove knuckle from hub fig 32 Ford Place knuckle assembly over spacer tool fig 33 Ford Use arbor press to install new bearing in hub fig 34 12 General Motors only Bearing seal installation 1 Clean dirt from shaft surface and steering knuckle bore Inspect for burrs nicks or damage 2 Apply wheel bearing grease on the new seal and knuckle bore Position the seal in the bore and press it in with a seal installation tool or equivalent fig 31 Ford models only Bearing seal removal 1 Using a jaw type puller grip the knuckle and remove it from the hub fig 32 2 Use a screwdriver to remove the snap ring bearing retainer from the knuckle assembly 3 Place a spacer tool on the face plate of an arbor press 4 Position the knuckle assembly outboard side up over the spacer tool fig 33 Apply pressure to the outer race and press the bearing out of the knuckle Ford models only Bearing seal installation 1 Inspect and clean the knuckle bore and hub housing Severely scratched areas should be filed or polished before installing the new bearing 2 Front wheel bearings and seals are removed and installed togethe2. bearing fig 4 10 Match the part number of the old bearing to select the correct SKF replacement Rinse bearing in clean solvent fig 5 Compressed air may be used to dry cleaned bearing fig 6 Place inner side of drum or rotor face up fig 8 Inspection and cleaning Note Equipment must conform to OSHA standards 1 Using a clean solvent and a clean dry cloth remove oil grease and dirt from the hub cavity dust cover and spindle 2 Use a clean brush to remove dust from brake parts CAUTION To avoid inhaling asbestos brake dust never blow off brake parts with compressed air 3 Place the bearing in a metal basket and suspend it in a clean container or tank of solvent If a basket is not available suspend the bearing with a wire or place it on a metal plate at the bottom of the container or tank 4 Rinse the bearing in clean solvent fig 5 Dry it thoroughly Natural air drying is the safest method to use Compressed air free of all condensed moisture may be used to blow out the bearings but only after dirt has been removed fig 6 CAUTION Never spin a bearing with compressed air Personal injury may result Also never use water or steam to clean or rinse a bearing Moisture causes corrosion which results in premature bearing failure 5 Inspect the cleaned bearing thoroughly for nicks pitted areas and damage If any of these are present discard the entire bearing and replace it
3. bearings For improved seal performance e Work with clean tools e Pre lube the seal with the same lubricant being retained e Double check the seal part number before installation Inspect the shaft and bore for burrs nicks or other damage before installing a new seal e Never reuse old seals e Never hammer directly on a seal For improved bearing performance e Work with clean tools in clean surroundings Keep bearings wrapped until ready to install e Pre lube bearings before installation e Keep bearing lubricants clean and in covered containers when not in use Remove all outside dirt from housing before exposing bearings e Clean the inside of the housing before replacing bearings e Never spin a bearing with compressed air e Never hammer directly on a bearing e Never mix old and new bearing parts Front wheel tapered bearing sets and seals for disc and drum brakes Bearing seal removal 1 Raise the front end of the car on a hoist or safe support it on jack stands Never work on a car supported only by a bumper jack Loosen brake caliper 2 Remove the hubcap or wheel cover Use a wrench or jack handle to mounting bolts fig 1 take off wheel lug nuts Then pull straight back to remove the wheel 2A On disc brake cars loosen and remove the brake caliper mounting bolts fig 1 CAUTION The brake line does not need to be disconnected but the caliper must be supported while d
4. with a new one 6 If it will not be reused immediately dip the cleaned bearing In a protective lubricant or coat the surface with a light grease Rotate the bearing to work grease thoroughly in and around the rollers and on the races Wrap the lubricated bearing in waterproof paper and place it in a clean box 7 Inspect the spindle for burrs nicks or embedded particles Carefully smooth out any roughness with an emery cloth Note Deep scores or grooves on the shaft surface where the seal makes contact must be repaired before reassembling the wheel see SKF Speedi Sleeves page 16 Bearing seal installation 1 Be sure the new seal is the correct one for the application If you are replacing the bearing the new part number must match the old one To select part numbers for either bearings or seals consult the SKF Passenger Car Light and Medium Truck Seals and Bearings Catalog SKF 457205 By hand or with an SKF bearing repacker PB270 force grease through the cage and rollers or balls and on all surfaces of the bearing fig 7 Place the inner side of the drum or rotor face up If you are replacing the bearing cup use the proper tool to drive the new cup into the hub fig 8 Coat the hub cavity with the same wheel bearing grease to the depth of the bearing cups smallest diameter Apply a light coat of grease to the spindle Place the inner bearing in the hub Lightly coat the lip of the new SKF seal w
5. 7 8 Remove the seal from the housing Grip axle shaft flange with a slide hammer fig 17 Inspect the old bearing for nicks pitting and damage If there is any damage the entire bearing must be replaced Never interchange new and old bearing parts 10 To replace the bearing put the axle in a vise Use a chisel and hammer to nick the bearing retainer in 3 or 4 places Be careful not to damage the axle shaft 11 Slide the loosened retainer from the shaft fig 18 12 Place the shaft in an arbor press Press the bearing off the shaft and i discard it Slide off retainer fig 18 Pre lube seal with differential lubricant fig 19 Tap new bearing into shaft cavity fig 20 Replace differential cover with new gasket fig 21 Use arbor press to install bearing fig 22 Bearing seal installation Be sure the new seal and bearing are correct for the application Check part numbers against the old seal Use the SKF Services Passenger Car and Light Truck Seals and Bearing Catalog SKF 457205 Steps listed below apply to either C Lock or non C Lock axles C Lock axles 1 Inspect the axle shaft and housing for nicks or scratches Carefully file to remove surface imperfections Note Deep scores or grooves on the shaft where the seal makes contact must be repaired See SKF Speedi Sleeve page 16 2 Pre lube the seal with same lube as contained in the differential fig 19 Put a ligh
6. Automotive edition Featuring front and rear wheel drive models ee A I 4 i imj Piat i i vel a a FR d a iT kG Bp k k ee ee P a e eae a z a i A re Introduction Contents The SKF Seal and Bearing Installation Guide SKF 457809 covers the removal and installation of SKF seals and bearings on front and rear wheel drive passenger cars Applications include e Front axle seals and bearings e Rear axle seals and bearings e Pinion seals Installation instructions also are provided for SKF Speedi Sleeves ultra thin stainless steel wear sleeves used to repair scored or seal worn shafts For more information For more Information on seal and bearing installation and maintenance ask for these SKF training materials e Roller and Ball Bearings Self Study Program 457640 e Automotive Shaft Seals Self Study Program 457492 e How to Inspect a Bearing Poster 457235 e Passenger Car and Light Truck Seals and Bearings Catalog 457205 To request these materials or order additional copies of this guide please write to SKF 890 N State Street Suite 200 Elgin IL 60123 9332 Attn Marketing Communications Note All material has been carefully compiled and thoroughly checked However no responsibility for possible errors can be assumed General tips for proper bearing and seal maintenance Follow these guidelines whenever replacing seals and
7. aft repair kit the SKF Speedi Sleeve See Speedi Sleeve section page 16 for instructions 3 Apply lubricant to the seal lips fig 43 With an SKF seal installation tool and adapter or similar tool press the seal into the housing fig 44 The seal should be centered and seated squarely 4 Check pinion shaft splines and yoke for burrs or damage Wipe the pinion clean 5 Apply lubricant to the outer diameter of the pinion yoke and on flange splines 6 Replace the pinion yoke on the shaft Match previously made marks so shaft and yoke align 7 While holding the flange tighten the pinion nut to previously recorded disassembly or preload torque 8 Connect rear end of the driveshaft to the pinion Align previously made markings 9 Replace the circular mounting flange or install U bolts or straps and secure the driveshaft in position 10 Add lubricant to within 1 8 1 4 from the bottom of the filler hole Do not overfill 11 Lower the car Pry out old pinion seal fig 41 Inspect pinion yoke seal surface fig 42 5 Apply lube to seal lips fig 43 Position installation tool and tap seal into housing fig 44 15 Shaft repair with SKF Speedi Sleeve NOTE If you can catch your fingernail in a seal track or shaft groove a Speedi Sleeve should be installed to prevent leakage Refer to the SKF Passenger Car Light and Medium Truck Seals and Bearings Catalog SKF 457205 fo
8. carefully pry out the seal Never reuse old seals Wipe dirt out of the knuckle cavity On With the knuckle supported on two wood pieces use a socket to press the inner bearing out of the knuckle fig 30 Record the part number and discard the old bearing 6 Select a new bearing and seal correct for the application Refer to the SKF Passenger Car Light and Medium Truck Seals and Bearings General Motors Use Catalog SKF 457205 puller to remove hub bearing bly fig 28 Chrysler models only os Bearing seal installation 1 Lightly coat the outer surface of the bearing with wheel bearing grease 2 Use a suitable installation tool to press the new bearing into the knuckle Apply pressure to the outer race only 3 Press on the bearing retainer and tighten retaining screws to approximately 20 ft Ibs Chrysler Remove hub 4 Use a socket to press the hub into the bearing 10 avoid bearing from knuckle fig 29 damage apply pressure to the inner race of the bearing only 5 Lightly coat the seal lip with wheel bearing grease Place the seal in the knuckle cavity and press it into position with a seal installation tool General Motors only Bearing seal removal 1 The front wheel bearing Is permanently sealed and lubricated assembly Adjustment is not possible Chrysler Use socket to press out old bearing fig 30 2 The steering knuckle seal should be replaced before a new bearing is installed
9. cause a false adjustment 6 Adjust the bearing to manufacturer s recommended setting If this Information 15 not available follow these guidelines While rotating the wheel tighten the adjusting nut until there s a slight bind and all bearing surfaces are in contact 7 Back off the adjusting nut 1 16 to 1 8 turn or to the nearest locking hole or enough so that the wheel rotates freely with 001 to 010 end play 8 Insert and bend the cotter pin Replace the dust cover 9 Torque lug nuts to manufacturer s recommended specifications 10 Lower the car slowly 11 Replace the wheel cover or hub cap Rear wheel bearings and seals for disc and drum brakes Note Before starting any removal procedures determine if the axle shafts are held in place by C shaped locks at the inner end or by a retainer plate bolted to the axle housing Then follow the steps below appropriate to C lock or non C lock type of axle shaft If unsure remove the differential carrier cover Bearing seal removal 1 Raise the rear end of the car on a hoist or support it on jack stands Both rear wheels must be elevated Do not work on cars supported only by bumper Jacks 2 Remove the hub cap or wheel cover Use a wrench or jack handle to take off wheel lug nuts Pull straight back to remove the wheel 3 Detach any retaining clips or bolts holding brake drums to axle shaft flanges Remove brake drums Note Brake adjustment may have to be backed of
10. ers the seal worn surface fig 47 If the installation tool supplied with the sleeve 15 too short a length of PVC pipe or tubing with a squared off burr free end can be substituted 8 Leave the Speedi Sleeve flange intact unless clearance is required Pry hana off installed Use side cutters to pry the flange away from the seal surface and Speedi Sleeve fig 48 twist it into a coil The flange will break loose along the pre cut line fig 48 9 After the Speedi Sleeve is installed check the shaft for burrs which could damage the seal 10 Lubricate the end of the Speedi Sleeve when installing the seal 12 Proceed with seal and bearing installation as outlined in this brochure 16 A C O Q O 7716 17 N 0 0 O Pai 18 A C O Q O 7716 19 SKF is a registered trademark of the SKF Group SKF Group 2010 The contents of this publication are the copyright of the publisher and may not be p reproduced even extracts unless permission is granted Every care has been taken to r ensure the accuracy of the information contained in this publication but no liability can F be accepted for any loss or damage whether direct indirect or consequential arising il out of the use of the information contained herein j Publication 457809 3 10 Printed in U S A j
11. f Emergency brake must be off 4 Brush dirt from the brake drum C Lock axles 5 Place a container or pan under the differential and remove the differential carrier cover Allow the rear axle lubricant to drain 6 Loosen the differential pinion shaft locking bolt Remove the pinion shaft fig 13 7 Push in on the axle shaft toward the center of the car Remove the Sea C lock from the grooved end of the shaft fig 14 Replace the pinion Pry out seal fig 15 shaft and locking bolt temporarily to keep differential gears in position 8 Pull the axle shaft from the housing Be careful not to damage the bearings and seal which remain in the housing 9 Insert a suitable tool pry bar behind the seal and pry it from the bore fig 15 Discard the seal Never reuse old seals 10 Place the legs of a slide hammer behind the bearing and remove it 11 Inspect the old bearing for nicks pitting and damage If there 15 any damage the entire bearing must be replaced Never interchange new and old bearing parts Remove nuts holding retainer plate fig 16 Non C Lock axles 5 Remove the nuts holding the retainer plate to the backing plate fig 16 6 Slide the retainer plate off of the studs To prevent the brake backing plate from slipping off reinstall and finger tighten the lower nuts 7 Grip the axle shaft flange with a puller or slide hammer Remove the axle shaft and bearing assembly fig 1
12. in position on the differential pinion The mounting flange attaches directly to the pinion yoke while U bolts straps contact the bearing cups Seal removal 1 Raise the car on a hoist 2 Make a mark where the driveshaft and the pinion flange meet fig 39 The driveshaft and flange were balanced at the factory and must be reassembled in the same position 3 Disconnect the driveshaft by unbolting the mounting flange If straps or U bolts are used tape the bearing cups in place be careful not to lose bearing rollers Remove the straps or U bolts 4 Support the driveshaft to prevent strain on the universal joint and the transmission extension housing seal fig 40 5 With a torque wrench placed on the pinion nut record the pinion bearing preload 6 Support the pinion yoke and remove the pinion nut and the washer 7 Place a pan under the seal to hold any lube that drains from the rear axle 8 Mark the pinion yoke and shaft to identify correct position for reassembly Remove the pinion yoke 9 Use a seal puller or suitable tool to pry out the old seal fig 41 Discard the old pinion seal Be careful not to damage the seal housing Never reuse old seals Seal installation 1 Select a new seal for the application Refer to the SKF Passenger Car Light and Medium Truck Seals and Bearings Catalog SKF 457205 2 Clean and inspect the pinion yoke seal surface fig 42 If damaged it may be repaired using a sh
13. isconnected to avoid brake line damage The caliper can usually be rested on the lower A frame or suspended by a wire loop 3 Using pliers or a screwdriver remove the dust cover and cotter pin fig 2 4 Loosen the adjusting nut Jerk the rotor or drum assembly to loosen Pull off dust cover fig 2 the washer and outer wheel bearing brakes may have to be backed off Push the assembly back on the spindle 5 Remove the adjusting nut washer and outer wheel bearing fig 3 6 Pull the drum or rotor assembly straight off the spindle Do not let the inner bearing or seal drag on the spindle threads 7 With seal side down lay the rotor or drum on the floor Place a drift or broom handle against the Inner face of the bearing cone Carefully 1 a Paa i 1 J a a tap out the old seal and inner bearing fig 4 Remove adjusting nut washer and outer bearing fig 3 8 Before discarding the seal record its part number to aid in selecting the correct SKF replacement Never reuse old seals Contamination entering past an old seal will ruin a bearing 9 Clean and inspect the old bearing thoroughly before reusing It see Cleaning and Inspection CAUTION If either the cup or cone 15 damaged discard the entire bearing and replace it with a new one Remember to drive the used bearing cup out of the hub CAUTION Never install a new bearing cone with a used bearing cup Tap out old seal and inner or vice versa
14. ith the same wheel bearing grease Slide the seal onto the proper SKF installation tool The seal should fit over the tools adaptor and the sealing lip should point toward the bearing fig 9 Position the seal so it starts squarely in the hub without cocking Tap the tool until the seal bottoms out When the sound of the striking mallet changes the seal will be fully seated in the hub fig 10 If an installation tool is unavailable use a wood block and hammer to drive in the seal Never hammer directly on the seal Be careful not to cock the seal Front wheel reassembly 1 Carefully l ft and push the drum or rotor assembly onto the spindle Keep the drum or rotor centered so the seal 15 not touched or damaged by the spindle threads Push the drum or rotor back until the seal is seated on the spindle s seal surface fig 11 Install the outer bearing cone washer and adjusting nut in that order fig 12 Replace the caliper on disc brake equipped cars 4 Replace the wheel Replace lug nuts and tighten evenly Slide SKF seal onto installation tool fig 9 Yr Br Tap tool until seal is seated in hub fig 10 N Install outer bearing fig 12 Loosen differential pinion shaft locking bolt fig 13 0 Remove C Lock fig 14 Bearing adjustment 5 Rotate the wheel to be sure the brakes are not dragging Dragging brakes will
15. manufacturer s service manual for bearing and seal replacement guidelines i Ford Turn hub retaining nut to overcome crimp in collar fig 23 Loosen brake caliper mounting bolts fig 24 Ford and Chrysler Loosen bolt on lower control arm fig 25 cam position before disassembly fig 26 10 Ford General Motors and Chrysler Hub assembly removal The hub 15 pressed or bolted to the steering knuckle assembly In some cases removal of the bearing assembly and the knuckle Is required to replace front wheel seals and bearing 1 Remove the hub cap or wheel cover Loosen the wheel nuts 2 With the car on the floor remove the cotter pin or lock on the hub nut Apply brakes and loosen the hub nut On Ford models turn the hub retaining nut until it overcomes the crimp in the nut collar fig 23 Do not use a screwdriver chisel or impact type tool which may damage the hub assembly Remove the nut and washer Discard the hub nut Raise the front end of the car and support it on jack stands Never work on a car supported only by a bumper jack Use a wrench or jack handle to take off wheel hub nuts Pull straight back to remove the wheel and tire Use proper tools to disconnect the tie rod end from the steering arm and remove the brake hose retainer Loosen and remove the brake caliper mounting bolts fig 24 Remove the caliper from the rotor Note The caliper must be sup
16. ported while disconnected to avoid brake line damage Suspend it by a wire loop 7 TA 78 Pull the rotor straight off the hub and studs On Ford and Chrysler models remove the bolt holding the lower control arm to the steering knuckle fig 25 Loosen the bolts that attach the strut to the knuckle If the bolts Incorporate an adjustment cam mark the cam position before disassembly fig 26 Use the manufacturer s specified tool or equivalent to push the constant velocity joint outer shaft until it is free of the hub bearing knuckle assembly While supporting the knuckle remove strut bolts Slide the hub bearing knuckle off of the strut On General Motors cars carefully remove the bolts that hold the hub bearing assembly to the knuckle fig 27 Note Never use a hammer which could cause internal bearing damage Install a puller and remove the hub bearing assembly from the shaft fig 28 Chrysler models only Bearing seal removal 1 Whenever the hub is removed service procedures require that a new bearing is installed 2 Using a suitable tool remove the hub from the knuckle With the tool in position drive the hub through the bearing fig 29 Note Bearing races may separate during removal General Motors Loosen hub 3 Use a bearing puller to grip and remove the bearing outer race bearing assembly bolts fig 27 4 Remove the bearing retainer from the knuckle assembly Use a screwdriver to
17. r as one cartridge unit Bearings are pre greased sealed and pre set They cannot be adjusted If the bearing seal cartridge is disassembled the entire unit must be replaced 3 Place a spacer tool on the arbor press face plate Position the knuckle assembly outboard side down over the spacer tool Insert a new bearing 10 the inboard side of the knuckle Place a bearing installer tool against the outer race Press the bearing into the knuckle until it seats squarely against the shoulder of the knuckle bore 4 Use pliers or a suitable tool to press the snap ring into the knuckle 5 Place the spacer tool on the press plate Position the hub lugs facing down over the spacer and the knuckle assembly outboard side down over the hub 6 Place the bearing installer tool on the inner race of the bearing and press down until it is seated squarely in the hub fig 34 Note Hub should rotate freely in the knuckle after installation 7 Use the proper installation tools to remove the old dust seal on the C V joint outer shaft Install a new dust seal Ford and Chrysler Bearing seal reassembly 1 Place the knuckle assembly on the ball joint stud fig 35 By hand push the shaft into the hub as far as possible Shaft splines should engage hub splines during installation 2 Loosely attach the knuckle to the strut Install the bolts without tightening On models incorporating cam bolts markings made prior eae Ford and Chry
18. r Speedi Sleeve sizes The correct Speedi Sleeve will be listed with the seal application data Measure shaft diameter in three places fig 45 SKF Speedi Sleeve installation Clean the surface where the seal contacts the shaft File down any burrs or rough spots 2 Measure the diameter where the sleeve will be positioned on an unworn portion of the shaft Measure in three positions and average the reading in case the shaft is out of round fig 45 If the average diameter is within the range for a given Speedi Sleeve size there is sufficient press fit built into the sleeve to keep It from sliding or spinning No cement Is necessary Place Installation tool over Speedi Sleeve fig 46 3 lf the groove does not require filling apply a light layer of non hardening sealant to the inner surface of the sleeve a 4 lf the shaft is deeply scored fill the groove with non hardening epoxy type filler Install Speedi Sleeve before the filler hardens 5 Determine how far back the sleeve must be positioned to cover the old seal wear tracks Measure to the exact point or mark directly on the surface The sleeve must be placed over the worn area not just bottomed or left flush with the end of the shaft Tap tool to install sleeve over shaft fig 47 6 Place installation tool over the Speedi Sleeve The flange end of the sleeve goes on the shaft first fig 46 7 Gently tap the center of the tool until the sleeve cov
19. sler Place to disassembly should realign for correct positioning knuckle assembly on ball joint 3A On Chrysler models tighten the bolts on the knuckle and strut to 45 stud fig 35 ft lbs Tighten the lower control arm stud or ball joint stud to 50 ft lbs fig 36 Position the tie rod end into the steering arm Tighten the nut to 35 ft lbs Install cotter pin 3B On Ford cars insert a hub knuckle installer tool and tighten to approximately 120 ft lbs until the hub is fully seated Remove the tool Insert the washer Install and finger tighten the hub nut Tighten the strut mounting bolts Connect the lower control arm and tie rod onto the knuckle Chrysler Tighten lower control General Motors arm attaching bolt fig 36 Bearing seal reassembly 1 Push the hub and bearing assembly onto the axle shaft fig 37 2 Partially tighten the hub nut approx 74 ft lbs until the hub bearing assembly s seated squarely on the shaft Ford Chrysler and General Motors Bearing seal reassembly 1 Place the rotor over the studs Install the caliper assembly over the General acta Push shaft disc Tighten caliper mounting bolts into hub fig 37 2 Connect the brake hose retainer to the strut and tighten screws Insert the hub washer and hub nut 3 While applying brakes tighten the hub nut to approximately 180 ft lbs fig 38 Install lock nut Insert a new cotter pin and bend it tightly against the lock nu
20. spect the axle shaft and housing Clean shaft cavity Lubricate the new bearing and seal as described above steps 1 and 2 under C Lock Axle instructions 2 Use an arbor press to install the new bearing on the axle shaft fig 22 Always apply pressure to the press fit race in this case the inner race is press fit 3 Press on the bearing retainer Note Never press the bearing and retainer onto the shaft at the same time 4 Insert the new seal Use a seal installation tool to press it 1010 the housing 5 Carefully insert the shaft and bearing into the housing Avoid damaging the seal Be sure the bearing 15 seated properly in the housing 6 Install the retainer plate over the axle housing studs Torque securing nuts to 35 ft lbs Rear wheel reassembly Both C Lock and non C Lock 1 Install the brake drum 2 Replace the wheel 3 Replace lug nuts and tighten evenly 4 Lower the car 5 Torque lug nuts to manufacturer s recommended specifications 6 Install the hubcap or wheel cover Front wheel bearings and seals for Chrysler General Motors and Ford Front axle assemblies on front wheel drive cars vary by manufacturer Following are seal and bearing replacement guidelines for Chrysler Ford and General Motors late model front wheel drive cars Consult the service manual for specific manufacturer recommendations Note Four wheel drive cars and front wheel drive import cars are not covered Consult the
21. t 3A On Ford models it is necessary to use a hardened chisel or similar tool to crimp the nut collar in the stub on the shaft This will stake the hub nut in position Tighten hub nut while 4 Install the wheel and tire assembly Tighten wheel nuts to 80 ft lbs applying brakes fig 38 5 Install hub cap or wheel cover Lower the car 13 Mark the driveshaft and pinion flange fig 39 Support driveshaft fig 40 14 Rear wheel bearings and seals On some Ford and Chrysler models rear axle seals and bearings are removed and installed very similarly to the front wheel seals and bearings on Rear Wheel Drive cars Refer to the seal and bearing replacement procedures for drum brakes found on pages 3 6 On General Motors models the rear hub and wheel bearing are assembled and installed together as a single unit One hub bearing assembly is bolted to each end of the car s rear axle Refer to the manufacturer service repair manual for wheel hub bearing assembly replacement procedures Pinion seal replacement Pinion seal maintenance recommendations vary by manufacturer Generally these seals must be replaced when leaks develop Pinion seals should be checked and replaced whenever servicing a universal joint Replacement of the pinion seal usually requires removal and installation of only the pinion shaft nut and flange Note A circular mounting flange U bolts or straps are used to hold the driveshaft
22. t coat of grease on and around all surfaces of the bearing 3 Use a bearing installation tool to press the new bearing into the axle shaft cavity The tool should only contact the press fit outer race The bearing is at proper depth when it contacts the bearing seat in the axle tube Be sure the bearing is seated squarely not cocked against the shoulder 4 Place the new seal on a seal installation tool Position the seal in the axle bore Use a mallet to tap the seal into the bore until it bottoms out and is flush with the end of the housing fig 20 Note The sound of the mallet changes when the seal bottoms out 5 Remove the differential pinion shaft locking bolt Remove the shaft Slide the axle shaft into place Make sure the shaft splines do not damage the new seal It will be necessary to turn the axle slightly to engage the splines into the differential side gear 6 Install the C lock on the inner end of the axle shaft Pull the shaft outward so the C lock seats squarely in the counter bore of the differential side gear 7 Insert the differential pinion shaft through the case and gears The lock bolt hole should align with the hole on the shaft Install the lock bolt and tighten to approximately 15 22 ft lbs 8 Clean the differential housing and cover Use a new gasket when installing the cover fig 21 9 Fill the differential with lubricant to the bottom of the filler hole Non C Lock axles 1 In
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