since 1994 release
Repair and operation of the car
+ Cars of the Skoda Felicia brand
+ Maintenance instruction
+ Routine maintenance
+ Repair of the engine
+ Cooling systems, heating
+ Power supply system
+ Engine electric equipment
Description of knots and mechanisms
Removal and installation of drafts of the drive of gear shifting
Replacement of epiploons
Check of serviceability of functioning, removal and installation of the sensor-vyklyu-chatelya of fires of a backing
Removal and installation of the mechanism of the drive of a speedometer
Removal and installation of the transmission
Capital repairs of RKPP, dismantling and assembly of knots and components
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body and finishing of salon
+ Onboard electric equipment
Description of knots and mechanismsRKPP coal mine
Components of assembly of the main transfer
Gear shifting mechanism
Hinged assembly of the drive of the mechanism of gear shifting
The section of the transmission is presented on an illustration.
The cast aluminum case of a box consists of three parts connected among themselves: case (dome) of coupling and main transfer, actually case of RKPP and cover. From the outer side of a cover the flange under installation of a support of the power unit is provided. The cover fastens to the transmission case six long bolts of M8x80 and three short M8x35.
The opening in which the sensor switch of fires of a backing is rolled is provided in the lower part of a case of RKPP. The drain stopper has M22 carving, sealing of its landing is provided with an aluminum sealing washer with an external diameter of 27 mm and internal - 22 mm.
In a case the magnet intended for removal from gearbox oil of the metal particles which are formed in the course of operation of the RKPP internal components is fixed.
The main shaft is established in RKPP case on two conic roller bearings: type 30205 AC6 and type 32005 AC6.
The shaft is delivered assembled with kosozuby gear wheels of 1 ÷ 4 transfers and a pryamozuby gear wheel of the reverse gear. At the same time gear wheels of the 1st and 2nd and back transfers represent with shaft a single whole, and the 3rd and 4th - napressovana. The gear wheel of the 5th transfer is put on a shaft on the needle PLC 43-18 bearing.
Ahead of a gear wheel of the 5th transfer its synchronizer, then a navernuta a nut of M22x1.5 (12) is located.
The secondary shaft is made with the leading gear wheel the main transfer at the same time and established in RKPP on two bearings: single-row PLC 05-12 ball-bearing and special PLC 44-17 bearing. Between the first bearing and the leading gear wheel of the main transfer gear wheels of the 4th transfer, the synchronizer 3/4 of transfers, a gear wheel of the 3rd transfer, then the 2nd, then the synchronizer 1/2 of transfers, and, at last a gear wheel of the 1st transfer are located. Ahead of the ball-bearing the gear wheel of the 5th transfer fixed by a nut of M22x1.5 is put. The coupling of the synchronizer 1/2 of transfers is equipped with a gear wreath, intended for turning on of the reverse gear.
Kosozuby gear wheels of 1 ÷ 4 transfers are equipped with additional gear wreaths for their interface to synchronizers.
Gear wheels of transfers
All listed gear wheels of both shaft are in continuous gearing among themselves. At the working engine and the included neutral transfer of a gear wheel of a secondary shaft are turned on it freely (an exception the gear wheel of the 5th transfer makes), the shaft at the same time remains motionless. At the same time, at the included coupling, gear wheels of a main shaft rotate together with it, except for a gear wheel of the 5th transfer which, being turned, remains motionless.
Use in the transmission of kosozuby gear wheels allowed to reduce the level of noise considerably.
Synchronizers provide unaccented introduction of a shaft to gearing with the gear wheel corresponding to the chosen transfer, only after alignment of frequencies of their rotation that guarantees smoothness of switching.
The intermediate gear wheel is intended for connection by a gear wheel of a backing of primary and secondary shaft. At the switched-off reverse gear of a gear wheel of shaft are brought out of gearing (in difference from gear wheels of other transfers). At inclusion of a reverse the intermediate gear wheel at the same time enters gearing with gear wheels of a backing of both shaft. Such double gearing forces a secondary shaft to rotate in the same direction, as primary, driving wheels of the car at the same time also begin to rotate in the opposite direction, providing progress of the car with a backing. In view of the fact that all gear wheels considered in this case are pryamozuby, the synchronizer is not provided here and the reverse gear should be turned on only after a full stop of the car.
Supply of lubricant to the RKPP internal components is carried out by the conducted gear wheel of the main transfer which is partially shipped in oil and at rotation transfers it up. From above oil on the pipeline system flows down to the canal of a secondary shaft and carries out greasing of gear wheels and synchronizers.
In a case of the transmission the small maslostok (33) on which the oil sprayed by gear wheels is brought to the bearing of a gear wheel of the 5th transfer is provided.
In the top part of a case there is an air vent which is corked plastic up. On a cylindrical part of a stopper there are rounds complicating oil passing, however, freely passing air.
Components of the main transfer are shown on an illustration. Assembly is intended for torque transmission from a secondary shaft of RKPP to power shafts of the leading forward wheels of the car, and also for increase in this torque.
Increase in torque is reached at the expense of the constant transfer relation (see Specifications).
The main components of the reverse gear are: the leading gear wheel which teeths are cut directly on a body of a secondary shaft of the transmission, the koronchaty conducted gear wheel to which end face eight bolts the differential box fastens. The main transfer of such design carries the name of cylindrical and differs from other in what does not change the direction of torque transmission. The leading gear wheel of the main transfer has 19 teeths, conducted - 74.
Association of the conducted gear wheel with a box of differential allowed to use the case of the last as basic pins under landing of assembly in bearings.
The differential provides an opportunity rotation of driving wheels of the car with various speed. When passing turns the internal wheel moves on smaller radius, than external and if speeds of rotation of wheels are identical, then inevitably there will be a slipping resulting in bystry wear of wheels. The similar situation can arise also the rectilinear movement of the car when tires of the right and left driving wheels in different degree are worn-out, or are beefy with various pressure. To prevent pro-slipping and to lower load of transmission, everyone their driving wheels of the car is given to rotation by the separate shaft connected to RKPP via the differential mechanism.
The differential consists of the case (box), satellites which are put on an axis and conic side gear wheels interfaced to power shafts of driving wheels of the car. The case of differential is one-piece. For installation of internal components in it cuts are provided. In the horizontal plane the case of differential comes to an end with pins on which napressovana bearings the PLC 64-7 type. External holders of bearings, in turn, are pressed in RKPP case openings.
Bearings are installed without gap. The pretightness is reached by placement in an opening of the left bearing of an adjusting washer of the corresponding thickness. Washers from 2.0 to 2.7 mm thick with a step to 0.1 mm are issued. On the pin located closer to a flywheel the additional gear wheel intended for the speedometer drive is established.
Openings under power shafts in a case of RKPP are pressurized by means of epiploons of 40х55х7 mm in size.
The axis of satellites is made of a steel core and is stopped from loss from a differential box by two lock rings, utaplivayemy in specially provided flutes since both ends of an axis.
Satellites represent the conic gear wheels which are freely rotating on the axis. Between wide end faces of satellites and walls of a box of differential the dish-shaped washers which are carrying out a role of plugs are established.
Conic side gear wheels of differential are in continuous gearing with satellites. On walls of their openings the longitudinal vents entering gearing with vents of internal pins of power shafts are cut.
At the rectilinear movement (and identical parameters of wheels) satellites, and side gear wheels which are in continuous gearing with them remain motionless concerning the axis and the case. The differential at the same time represents as if monolithic assembly, with the identical speed rotating both power shafts. At the movement of the car on a curve, or various characteristics of wheel assemblies, one of wheels (internal on turn radius, or bigger diameter) encounters the bigger resistance which is rigidly transferred to the corresponding side gear wheel of differential, forcing it to be braked due to relative movement of planetary assembly with beginners to rotate satellites. Despite a difference in the frequency of rotation of driving wheels of the car, the size of the torque transferred to them remains identical. At the same time, if one wheel gets on the site of a surface with the lowered coupling component (ice, snow, sand, etc.), and the second remains on a hard coating, then the first wheel will rotate with raised (up to doubled) speed, the second can cease to rotate at all.
During operation of the car it is necessary to watch similarity of characteristics of the right and left driving wheels of the car (pressure of a rating of tires, degree of wear of a protector, geometrical characteristics, etc.) as otherwise the differential will continue to function even at the rectilinear movement, creating the additional resistance connected with increase in fuel consumption.
Gear shifting mechanism
The mechanism of gear shifting consists of a rod of the choice of transfers, two rods of forks of the switching and the device preventing simultaneous inclusion of two transfers.
The rod of the choice of transfers is connected by one end to draft of the drive of gear shifting, and on other its end the trekhplechy control lever is fixed by rods of forks of switching. The place of an exit of a rod of the choice of transfers from a case of RKPP is protected from dust by means of a rubber cover.
On one of rods of switching forks of inclusion of 1/2 and 3/4 transfers are put. On another - a fork of inclusion of the 5th transfer and the lever of inclusion of a backing.
The ends of forks are placed in pro-points of external rings of the corresponding synchronizers. Movement of a fork leads to the shift of the synchronizer and introduction to gearing of the leader and the corresponding transfer conducted gear wheels.
Gear shifting mechanism drive
The jet bar located under the body bottom fastens to the transmission and the bottom. Will screw M6x20 bolt passing through the rubber plug put in a tip of a jet bar of a special form in the transmission. The back end of a bar is established in the rubber emphasis pressed from below by the fixing collar attracted by two bolts of M8x40. In openings of a rubber emphasis the plugs protecting assembly from excessive compression are put. The control lever of RKPP is slightly bent and in the lower part is equipped with the spherical hinge. The lower end of the lever comes to an end with the cross axial plug, and top is supplied with the handle.
The hinge of the lever is placed the cavity formed by two plugs of a special form put in a support. On the external surfaces of both plugs are provided a flute in which rubber rings are put. All knot assembled fastens from above in a support by means of a lock ring under which it is put a remote washer. The knot protects a rubber boot from pollution.
The cross plug located on the lower end of a control lever of RKPP is intended for connection of the lever with a fork of draft of the drive of the mechanism of switching by means of a bolt of M8 and a nut. The second end of draft terminates in the cross plug by means of which he joins the cardan hinge, connecting draft to a bar of the choice of transfers. Not the end of a bar of the choice of transfers the connecting coupling of 8х20 mm fixed at a cylindrical pin is located.