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 printable version
Service front wheel hubs and drive shafts
 | To perform the procedures described below require the following special tools: replaceable face head by 53 mm (models with manual transmission switching hub) or a homemade nozzle (models with automatic drive) - for the give and tightening the nut wheel bearing. |
Removing and dismantling | - Loosen the nuts of the front wheel.
- Poddomkratte the front of the car and establish it on props, the institution under the frame side members. Remove the front wheel.
- If you need to replace the drive shaft, remove the drain plug and drain the oil from the crankcase of the front axle of the vehicle.
- Give fixing bolts and remove from the knuckle brake caliper. Tie up the side of the caliper to the suspension elements, making sure not to taut and turned out to be a twisted brake hose.
- On models with a manual drive switch Kit (Kit components are shown in the accompanying illustration):
- Release the drive hub (position FREE), give fixing bolts and remove the drive from the hub of the wheel.
- Remove the retaining ring from the end of the drive shaft and remove the drive sleeve.
- Remove from the wheel hub and spacer ring. Straighten the lock washer and the box with the help of a replaceable head 53 mm give the lock nut wheel bearing. Discard the lock washer, turn the hub nut and remove the washer from the stub axle.
- On models with automatic drive switching hub:
- Switch actuator to position LOCK, give fixing bolts and remove the drive from the hub of the wheel. Remove and discard the O-ring.
- Remove the end of the drive shaft retaining ring and remove the inner brake assembly.
- Give fixing screws lock washers, remove the retaining plate and remove the hub nut on the stub axle using a specially self-made device (see. Accompanying illustration).
- Remove the hub assembly with a disk with a rotary pin. Try not to drop while the outer bearing cone.
- Having hooked a suitable lever or a screwdriver, remove the inside of the hub gland and discard it. Remove the cone and the inner bearing.
| If the wheel bearings are removed only for their perenabivki lubricant is not necessary to extract their cups, but because the procedure of the next section can be omitted. |
- Prop up the hub assembly and using a brass punch knock out her inner and outer bearing cups. Removing the inner cup is made from the inner end of the hub, the outside - from the outside.
- Mark the position of the hub relative to the brake disk, then give fixing bolts and separate the disc from the hub.
- Give bolts of the brake shield and the knuckle to the stub axle, then remove the boot with a shield.
- Hammer with soft brisk beat out a pin of the knuckle.
- Install the knuckle to the straight-ahead position, remove the drive shaft from the axle housing. Remove the thrust washer from the shaft.
- Remove the oil seal from the rear of a rotary pin, then use the punch, remove the drive shaft support bearing (stub axle components are shown in the accompanying illustration). Discard bearing.
- Using a hammer with sliding brisk remove the axle housing inner drive shaft seal (see. Accompanying illustration).
- If necessary, disassemble the components to assemble the drive switching hub (see. Accompanying illustration):
| A good practice is periodic disassembly, inspection and lubrication condition of drive components switching multi-purpose grease on lithium basis. |
| The unit automatically switch actuator can not be disassembled and replaced in case of failure of the whole. |
- Mark the position of the actuator housing switching hub with respect to the clutch.
- Turn the cover, remove the clips and remove the clutch.
- Using the flat-blade screwdriver, remove the retaining ring fastening the handle switch in the housing. Knock out a pen from the case, try not to drop the ball at the same time with the spring.
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Cleaning and checking the status of components | - Rinse all components with the exception of seals in the cleaning solvent and dry them with compressed air.
| To avoid personal injury or damage to the bearings do not rotate them, blowing with compressed air. |
- Check roller bearings and cups in the presence of cavities, signs of wear or damage. If necessary, replace.
| Replacing individual components bearing on an individual basis is not possible, so in case of defects replacing bearing assembly. |
- Check the condition of the threads on the end of the stub axle and the hub nut.
- Check hub for cracks and other damage.
- Inspect the drive shaft for cracks and wear of the splines. Rate SHRUS freedom of rotation when rotated at an angle of the outer drive shaft.
| If the drive shaft CV joint or declared unfit for further use, you must replace them in the assembly. |
- Check the thrust washer and the hub nut for cracks and wear.
- Look for cracks and other damage to the cover drive switching hub. Check freedom of movement in the clutch housing.
- Check the condition of the sealing ring in the drive manually, if necessary, replace the ring.
| If any of the components of the manual actuator switching hub, in addition to the clutch gear found to be defective, replace the drive assembly. No special requirements for a removable locking ring of the car manufacturers do not make. |
- Replace defective components.
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Assembly and installation | If the description of the procedure is specifically agreed type of lubricant, it means the use of a universal lithium-based grease. |
| - Using a suitable mandrel, set the inner oil seal into the crankcase of the bridge. Put the oil seal is flush with the edges of the groove. Lubricate the oil seal lips.
- Tamp CV joint driveshaft molybdenum disulfide grease on lithium based, insert the shaft into the axle housing and enter into engagement with the splines of the differential. Try not to damage in the course of this procedure, the internal shaft seal.
- Coat the thrust washer and put it on the drive shaft.
- Using a suitable mandrel, set in the back of the stub axle new thrust bearing and drive shaft oil seal. Lubricate the installed components.
- Install the assembly on the stub axle drive shaft and knuckle. Zastuchite assembly to complete planting hammer with soft brisk.
- Grease boot, install a shield with brake dust lip to stub axle and tighten the mounting bolts to 30 ÷ 40 Nm.
- Install the brake disc on the hub, making sure registration inflicted during dismantling labels mutual position. Tighten the mounting bolts to 50 ÷ 68 Nm.
- Using a brass punch set bearing cup into the hub (outside and restrictions in different directions).
 | - Tamp cones inner and outer bearings with high temperature grease on lithium based, carefully filling it mezhrolikovoe space, the inner ring and the cage (see. Accompanying illustration).
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- Set the cone of the inner bearing into the hub, then plant the hub gland flush with the end of the last contraction of the bearing. Lubricate the oil seal lips.
- Tamp the hub cavity between the cups bearing grease high temperature lithium-based hub and put on a rotary pin.
- Prop up the hub assembly and install the outer bearing cone.
- On models with manual transmission switching hub install the pivot pin retainer.
 | - Coat the surface of the hub nut and adjust the bearing preload:
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- Tighten the nut with a force of 167 ÷ 196 Nm, repeatedly turn the wheel hub in different directions and then fully release the nut.
- Tighten the nut with a force of 3 ÷ 5 Nm, repeatedly turn the hub in both directions, and retighten the nut to 3 ÷ 5 Nm. Again rotate the hub in opposite directions.
- Fix the dial gauge, leaning his plug to the hub surface and measure the amount of axial play of the hub (see. Accompanying illustration). If the result is greater than 0.08 mm, remove the hub assembly and check the bearings and nuts HERZ-TS (not whether there was a distortion of it on the thread).
- On models with automatic drive, set the switch lock plate and securely tighten the screws of its fastening.
 | - On models with manual transmission perform the following procedures:
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- Lubricate new thrust washer, put it on the pivot pin, screw and tighten the lock nut with a force of 167 ÷ 196 Nm.
- Put on the inner walls of the sleeve at least six grams of grease, then use a hammer with soft brisk plant remote ring and sleeve in the hub.
- Apply at least six grams of grease on the outer edge of the flange of the drive coupling and set coupling to the pivot pin.
- Grasp the end of the drive shaft and pull it out of the stub axle. Insert into the groove at the end of the shaft retaining ring, and then use the stylus blade, measure the amount of axial play of the shaft. The backlash should not exceed 0.2 mm. If necessary, adjust to a new circlip corresponding thickness.
| The old ring is replaced by a mandatory basis. |
- Thoroughly lubricate the drive components switching hub.
- Slide the switch on the handle of a new sealing ring. Fill in the handle spring and ball, then plant it in a casing, making sure that the ball hit the groove. Install retaining ring.
- Hold the handle in position LOCK, screw the clutch into the housing so that the driving gear is flush with the shoulders, Rout inside the upper end of the housing (see. Accompanying illustration) and applied in the process of dismantling the landing marks are aligned.
- Lubricate the end of the drive shaft and by moving the lever to FREE, set the switching hub drive assembly to the drive shaft. Tighten the mounting bolts to 54 ÷ 59 Nm and check the smoothness of gear drive.
- On models with automatic drive switching hub:
- Put inside the brake assembly and the washer on the drive shaft.
- Grasp the end of the drive shaft and pull it out of the stub axle. Insert into the groove at the end of the shaft retaining ring, and then use the stylus blade, measure the amount of axial play of the shaft. The backlash should not exceed 0.2 mm. If necessary, adjust to a new circlip corresponding thickness.
| The old ring is replaced by a mandatory basis. |
- Lubricate the inner brake assembly and the inside of the switch actuator assembly hub.
- Switch the drive assembly to the LOCK position and gently push it toward the front of the hub, making sure that the protruding ends of the wire clamp is not combined with the projections proved to release the brake actuator. If necessary, remove the drive assembly, if you can not squeeze it tightly to the front hub.
- Screw fixing bolts and tighten them with a force of 54 ÷ 64 Nm.
- Install the brake caliper and tighten bolts of its fastening with effort 72 ÷ 79 Nm.
- Fill the housing front axle required amount of oil demanded grade (see. Table sizes and adjustments in the end of this manual).
- On models with automatic drive switching hubs of the front wheels turn on the 4WD mode and set the transmission into gear. Switch the drive to the AUTO position, and for releasing the hub alternately rotate each of the front wheels in both directions while holding etomprotivopolozhnoe still.
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