145 - MiTo   1.4 16v TJet   FRONT WHEEL GEOMETRY - CHECK USING OPTICAL EQUIPMENT - INCLUDES ADJUSTMENT IF NECESSARY   4450A10   

Detail     Detail

- This check procedure must be carried out after each operation on the front suspension mechanical components since its purpose is to define the position of the wheels in relation to the body (e.g.: track control arms, struts, shock absorbers, springs etc.).

PROCEDURE

General information

The wheel geometry/angle checks must be carried out using appropriate optical equipment after checking and adjusting tyre inflation pressure to the specified values and ensuring that the vehicle respects one of the following load conditions:

- Standard 0 - vehicle unladen including spare wheel, tools, accessories and consumables with 5 litres of fuel

- "Standard A" - vehicle unladen including spare wheel, tools, accessories and tank filling (full tank of fuel).

GEOMETRY CHECK

- Check that the geometry of the front wheels is within prescribed values; to measure the geometry, check the distance from the ground to the maximum point of curvature on the front wing (protrusion).

 

Size

  

Value

  

Validity
 

Front geometry - protrusion height (mm)

  

663 +/- 5 (Standard 0)

  

1.4 16v TJet 120 HP
 

Size

  

Value

  

Validity
 

Front geometry - protrusion height (mm)

  

659 +/- 5 (Standard A)

  

1.4 16v TJet 120 HP
 

Size

  

Value

  

Validity
 

Front geometry - protrusion height (mm)

  

661 +/- 5 (Standard 0)

  

1.4 16v TJet 155 HP
 

Size

  

Value

  

Validity
 

Front geometry - protrusion height (mm)

  

656 +/- 5 (Standard A)

  

1.4 16v TJet 155 HP

TOE-IN CHECK

- Check that the front wheel toe in is within required limits.

 

Size

  

Value

  

Validity
 

Front wheel toe in (mm)

  

- 1 +/- 1 mm

(Standard 0 and Standard A)

  

- If the front wheel toe-in value is not within the recommended figures, adjust it according to the instructions given below.

- Make sure the steering wheel is perfectly straight and lock it using a suitable tool.

- Loosen the nuts locking the left and right steering box rods.

- Tighten or loosen the steering box rods until the toe-in value is correct, keeping the front wheels aligned.

When the adjustment is completed, the number of free threads on the right steering rod should be the same as the number of free threads on the left rod.

- Tighten the nuts locking the left and right steering box rods to the prescribed torque.

 

Component

  

Fixing

  

dia

  

Value (daNm)

  

Validity
 

Adjustment rod

  

Nut

  

M14

  

4.5 ÷ 5.5

  

- Remove the tool for locking the steering wheel.

CAMBER CHECK

The front wheel camber cannot be adjusted. If the reading is not within specified values, check the lower wishbone and the body.

- Check that the front wheel camber is within required limits.

 

Size

  

Value

  

Validity
 

Front wheel camber (degrees)

  

- 27’ +/- 20’

(Standard 0 and Standard A)

 

CASTER CHECK

The front wheel caster cannot be adjusted. If the value is not within the recommended limits, check the lower track control arm and the body shell.

- Check that the front wheel caster is within prescribed limits.

 

Size

  

Value

  

Validity
 

Front pillar caster (degrees)

  

+ 3° 29’ +/- 30’

(Standard 0 and Standard A)

  

Connect the diagnosis equipment to calibrate the "steering electrically controlled device position sensor".