Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

Condition check, adjustment of a tension and replacement of a driving belt (each 12 000 km (7500 miles) run, or times in 6 months)

Check

Driving (or as it often call, V-shaped, or simply "ventilyatorny") the belt is located in a forward part of the engine and plays important role in providing it and all auxiliary units of functioning. In view of nature of the use and the material nature from which it is made, the belt is exposed eventually to some physical changes and its condition, no less than tension adjustment, in order to avoid serious damages of the engine, should be checked and be corrected regularly.

On these models of cars the unique driving belt of tape type actuating the generator, the pump of system of hydrostrengthening of a wheel and the compressor of the conditioner of air is used.

PERFORMANCE ORDER

At the switched-off engine open a cowl and find the driving belt being in a forward part of the engine. By means of a small lamp carefully examine a belt on all length, checking it on existence of stratifications, cracks, separations of tapes from a sticky basis, gaps and wear of tapes, cracks on internal edges of tapes and other damages and defects. The belt condition from its both parties that means need of a reversing of each of examined sites of a belt inside out should be checked. Sites of a belt inaccessible to survey should are carefully checked to the touch. In case of identification of any of above-mentioned defects the belt is subject to replacement (pass to the item. "For belt replacement..." or "For weakening of a tension of a belt...").

Existence of only small cross-section cracks on inside of a V-shaped belt - is admissible at detection of longitudinal cracks or the separated slices being a source of extraneous sounds at work of a belt, demands replacement of the last.

Adjustment

The tension of a driving belt of 6-cylinder engines is checked by means of the special measuring instrument hooked for the middle of a direct site of a belt between a pulley of the pump of system of hydrostrengthening of a wheel and a tension roller. Compare instrument readings to requirements of Specifications at the beginning of this Chapter.

If you have possibility to use a measuring instrument of effort of a tension of a belt of Nippondenso or Burroughs firms, in drawing is shown as to use each of them - compare indications of scales of devices to requirements of Specifications (only for 6-cylinder engines).

Adjustment of a tension of a belt is carried out by weakening of an axial bolt of a pulley of the pump of system of hydrostrengthening of a wheel, a lock-nut and lock bolts, then it is necessary to turn an adjusting bolt counter-clockwise for weakening of effort of a tension, or clockwise - for increase. Repeat procedure before receiving satisfactory result, then shade a lock-nut and bolts.

PERFORMANCE ORDER

On the models equipped with 6-cylinder engines weaken pulley bolts наоса the power steering and turn an adjusting bolt of a natyazhitel in the relevant party for increase or weakening of effort of a tension of a belt.

On the models equipped with V8 engines with effort of a tension of a belt the podpruzhinenny natyazhitel and need for regular adjustment of a tension operates is absent. If the arrow of the index on a back wall of a natyazhitel is rejected from a control label on a casing of a natyazhitel more than on 3,2 mm, it is necessary to replace a belt.

Natyazhitel of a belt of the tape type, applied on V8 engines automatically supports effort of its tension, however, in limited limits - the arrow of the index on a casing of a natyazhitel (In) should not deviate further a point And on a casing.

Replacement

6-cylinder engines

For replacement of a belt make all procedures which are carried out by preparation for adjustment of its tension, however, in summary remove a belt from a pulley of a cranked shaft and take it from an impellent compartment. At installation of a new belt track correctness of its laying as violation can lead it to rotation of a water wheel in the opposite direction. The scheme of laying of a belt is provided on шильде, fixed on a fan casing.

Typical scheme of laying of a tape driving belt of the 6-cylinder engine.

V8 engines

PERFORMANCE ORDER

For weakening of a tension of a belt turn a natyazhitel by means of a face head on 3/8 inches (9,53 mm) clockwise. After weakening of a tension of a belt the natyazhitel will deviate down. Remove a belt and carefully release a natyazhitel. Put on a new belt pulleys, again having turned for this purpose a natyazhitel. Release a natyazhitel. Remember that violation of correctness of laying of a belt can lead to rotation of the water pump in the opposite direction that will cause a fast overheat of the engine. The scheme of laying of a driving belt is provided on шильде, fixed on a fan casing.

Weaken effort of a tension of a belt, having turned a natyazhitel clockwise by means of the key which has been put on its bolt.

The scheme of laying of a driving belt is provided on шильде fixed on a casing of the fan or a radiator bracket.

All engines

PERFORMANCE ORDER

The removed old belt take with itself in shop for a sravnivaniye with it new - belts should correspond each other on a design, length and width.
At replacement of a driving belt watch correctness of its installation in flutes of pulleys. Correctness of centering of a belt on pulleys is of great importance for reliability of its functioning.
Adjust a tension of a new belt according to indications of the above-stated points.