Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Kardannye shaft, differentials and bridges - the general information

Kardannye shaft

The kardannyj shaft serves for transfer of capacity from transmission (2WD) or a distributing box (4WD) to the back bridge of the car. On all-wheel drive (4WD) models given карданный the shaft carries the name of the back. карданный the shaft of all-wheel drive models serves as the second for transfer of capacity from a distributing box to the forward bridge and is called to lobbies.

At car movement on a rough road covering bridges start to "float" upwards-downwards, therefore карданные shaft work in the conditions of constant change of a corner of the position in relation to transmission / to a distributing box and suspension bracket bridges. Such mode of functioning appears possible thanks to inclusion in structure of shaft (from both of them the ends) карданных hinges. Change of corners of position карданных shaft naturally conducts to necessity of constant change of their length that is reached thanks to application of sliding holders крестовин.

On models 1993 вып. In forward карданный the shaft is established карданный the hinge of a series 1310, and in a back shaft - the hinge of a series 2950. Two types карданных knots - with one hinge and two hinges are used.

Components typical карданного knot двухшарнирного type

On models 1994 вып. On both (forward and back) карданных shaft are applied карданные hinges of a series 1310. Again two types карданных knots - with one hinge, or with two are applied.

On models 1995 вып. Three types карданных knots - with one hinge, with two hinges and with the CV-hinge are used. The CV-hinge is not subject to repair; in case of damage of the hinge or its protective cover should vary карданный a shaft in gathering.

On all-wheel drive models 1995 вып. Three types forward карданного a shaft are applied. Shaft of the First and Second types are equipped одношарнирными карданными by knots from outside, the suspension bracket turned to the bridge and двухшарнирными in knots from outside a distributing box. Unique difference of one of these types of shaft from another is application of a various design of protection of holders крестовин from a dust and a dirt. On the First type the dustproof cover whereas on the second the rubber cover is used is applied. Shaft of the Third type крестовины are not equipped by the sliding holder. Instead of it in them the CV-hinge established from outside of the forward bridge is applied. Need for use of the sliding holder disappears in view of ability of the CV-hinge to be compressed and extend. Equipped шлицами the shaft in the CV-hinge allows to support constantly length карданного a shaft in the course of car movement on optimum value. However, the full length карданного a shaft in this case is exposed in the course of its manufacturing. Do not try to make adjustment of length карданного a shaft of the Third type.

Фабрично established карданные knots do not require greasing. Greasing of sliding holders крестовин forward карданного a shaft of all-wheel drive models 1993 and 1994 вып. And карданного a shaft of the First type of models 1995 вып. It should be made regularly, according to the schedule of routine maintenance of the car (the Head of Adjustment and routine maintenance). Sliding holders крестовин such shaft are equipped for this purpose by the lubricant union of type ZERK.

In the course of installation on the car careful and very exact balancing both forward, and back карданных shaft is made. In view of the last, each time after removal shaft should be established into place in accuracy in the same way as they stood earlier. The neglect performance of the given requirement is fraught with development of strong vibrations and, as consequence, serious damages трансмиссионной car lines.

Differentials

The differential is located in the pig-iron case which, in turn, is an integral part of assemblage of the bridge. The stamped steel cover приболчена to the open back party of the case also serves for providing of access to its internal components in the course of survey and preventive maintenance. For represents transfer гипоидного type the central line of a leading gear wheel in which is located below the central line of a conducted gear wheel of the main transfer. Except differential of a standard design on cars of the given mark blocks Trac-Lock with blocking (only in back bridges of Model 35) can be established also. If one of wheels starts to revolve, having lost coupling with a road covering, block Trac-Lock starts to transfer its twisting percent to the opposite. In a kind of necessity of application for adjustment and major repairs of differentials of the special tool, and also presence of certain qualification of the personnel, the given works are a prerogative of experts of a workshop of car-care centre or dealer branch of company Chrysler.

Bridges

Forward power shafts all-wheel drive (4WD) are placed in a sleeve of the forward bridge of Model 30. The bridge represents two steel sleeves, welded on the pig-iron central case in which differential assemblage is placed. The block is equipped by the ventilation serving for dump of superfluous internal pressure, arising owing to evaporation and thermal expansion of a lubricant liquid. The forward bridge is equipped by power shafts of semifloating type on which loading is perceived by bearings of naves. Shaft fasten to bearings of naves by means of nuts. Service of bearings is made only in gathering, i.e. they are not subject to restoration. The external ends of power shafts are equipped by hinges of equal angular speeds (CV-hinges) that provides possibility of turn of forward wheels to the right-to the left. Besides, the bridge is equipped by system of antiblocking of brakes (ABS). Gauges ABS are fixed in assemblages of rotary fists; Rotors of gauges запрессованы in shaft near to flanges of naves. Outside to a cover of the case of differential of the bridge of Model 30 fastens шильда with the data about serial number and transfer number. The identification code of a date of issue of the bridge is beaten out behind on its sleeve. At bridge replacement always consider this data.

Back semiaxes (all models) are placed in sleeves of the bridge of Model 35 which is almost identical on a design to assemblage described above Model 30 of the forward bridge. Sometimes Model 35 bridge can be in addition equipped by block Trac-Lock and differential of the limited sliding. Serial number and transfer number of differential of the bridge of Model 35 can be besides found on fixed on a differential cover шильде. The code of date of manufacturing is beaten out on the back party of a sleeve. All this data necessarily should be taken into consideration at bridge replacement.

Not all-wheel drive (2WD) models, sleeves of the forward bridge of models 4WD and sleeves of the back bridge of all models it is possible to find fuller information on a beam of the forward bridge in the Head the Suspension bracket and a steering.