Jeep Grand Cherokee

1993-1999 of release

Repair and operation of the car



Jeep Grand Cherokee
- Cars of the Jeep Grand Cherokee brand
   + Identification numbers of the car
   Acquisition of spare parts
   - Technology of service, tool and equipment of a workplace
      Technology of service
      Fixture
      Fixture sizes
      Procedure and order of tightening of threaded connections
      Dismantling of components
      Pro-masonry surfaces
      Councils for removal of hoses
      Tool
      Workplace equipment
   + Poddomkrachivaniye and towage
   Start of the engine from the auxiliary power supply
   + Automobile chemicals, oils and lubricants
   + Diagnostics of malfunctions
+ Settings and routine maintenance
+ Line six-cylinder engine
+ V8 engine
+ Procedures of the general and capital repairs of the engine
+ Cooling systems, heating and air conditioning
+ A power supply system and production of the fulfilled gases
+ System of electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of gear shifting
+ Automatic transmission
+ Transfer case
+ Coupling and transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of onboard electric equipment
+ Governing bodies and methods of operation



Fixture sizes

For many reasons manufacturers of cars use metric fixture more and more widely. However, it is important to know a difference between used sometimes standard (called also American, or the SAE standard) and more universal in system of measures metric fixture as, despite external similarity, they are not interchangeable.

All bolts, both standard, and metric are classified by diameter, a step of a carving and length. For example, the standard bolt 1/2 - 13 x 1 has an inch floor in the diameter, 13 rounds of a carving on one inch and length of 1 inch. The metric bolt of M12 - 1.75 x 25 has diameter of 12 mm, a step of a carving of 1.75 mm (distance between the next rounds) and length of 25 mm. Both bolts are externally almost identical, however are not interchangeable.

In addition to the listed signs both metric, and standard bolts can be identified by survey of a head. For a start, the distance between lyska of a head of a metric bolt is measured in mm whereas at standard - in inches (the same is fair also for nuts). As a result, the standard wrench does not suit for use with metric fixture and vice versa. Besides, on heads of the most part of standard bolts usually there are radial notches defining the maximum admissible effort of tightening of a bolt (durability degree). The more the quantity of notches, the are higher admissible effort (on cars bolts with degree of durability from 0 to 5 are usually applied). The class of durability of metric bolts is defined by a digital code. Figures of a code are usually cast, as well as for standard, on a bolt head (on cars bolts of classes of durability 8.8, 9.8, and 10.9 are usually applied).

 
Marking of a class of durability of bolts (above – standartnye/SAE/SS, below – metric).

Also on durability class tags standard nuts can be distinguished from metric. Dot tags, proshtampovyvayemy on one of face surfaces of a nut while marking of metric nuts is made by means of besides figures are applied to identification of durability of standard nuts. The quantity of points are more, or the value of a digital code is higher, the admissible effort of tightening of a nut is higher.

End faces of metric hairpins are also marked according to a class of their durability. Large hairpins are marked by a digital code whereas marking in the form of a geometrical figure is applied on smaller.

It is necessary to notice that a considerable part of fixture, in particular the class of durability from 0 to 2, is not marked at all. In this case the only way of difference of standard fixture from metric is measurement of a step of a carving, or comparison of a carving with unambiguously identified.

Standard fixture is often called also, contrary to metric, SAE standard fixture, however, it is necessary to remember that under classification of SAE only small fixture gets. Large fixture with not metric carving is fixture of the American standard (USS).

As fixture of the same geometrical size (both standard, and metric) can have various classes of durability, when replacing on the car of bolts, nuts and hairpins it is necessary to pay attention to compliance of a class of durability of the installed new fixture to a class of durability of old.

Marking of a class of durability of standard six-sided nuts

Durability class Identification of a class
Six-sided nut — a class of durability 5

Six-sided nut — a class of durability 8

Marking of a class of durability of metric six-sided nuts

Durability class Identification of a class

Six-sided nut — a class of durability 9

Six-sided nut — a class of durability 10

Marking of a class of durability of metric hairpins

 

Sizes/marking of a class of durability of standard (SAE and USS) bolts

G — Marking of a class of durability
L — Length (in inches)
T — a carving Step (quantity of rounds on inch)
D — Nominal diameter (in inches)

Sizes/marking of a class of durability of metric bolts

P — durability Class
L — Length (in mm)
T — a carving Step (distance between the next rounds in mm)
D — Nominal diameter (in mm)

Sizes of metric carvings

M-6
9 — 12 N • m
M-8
19 — 28 N • m
M-10
38 — 54 N • m
M-12
68 — 96 N • m
M-14
109 — 154 N • m

Sizes of pipe carvings

1/8
7 — 10 N • m
1/4
17 — 24 N • m
3/8
30 — 44 N • m
1/2
34 — 47 N • m

Sizes of carvings of the American standard

1/4 - 20
9 — 12 N • m
5/16 - 18
17 — 24 N • m
5/16 - 24
19 — 27 N • m
3/8 - 16
30 — 43 N • m
3/8 - 24
37 — 51 N • m
7/16 - 24
55 — 74 N • m
7/16 - 20
55 — 81 N • m
1/2 - 13
75 — 108 N • m