Steering column



Operation of the steering column


The steering column assembly comprises:
- a fixed lower part composed of a pipe and a body foot;
- a mobile upper part composed of a pipe, a welded stirrup and a unit containing the steering wheel height and tilt adjustment systems.

Height adjustment 
When the control lever (4) is moved upwards, the “T” rod makes the cranked lever (8) pivot, lowering the arm (15) articulated with the pin (14). The screw (5) integral with the arm presses against the brake plate (16), freeing it and allowing the upper part of the steering column to move. The spring (3) returns the lever (4) to position. The stop (25) limits the movement of both parts.

Tilt adjustment 
When the control lever (4) is moved downwards, press the T rod which pushes against the end of the notched lever (9), freeing it from the steering rack (10) and allowing to tilt the unit (20). The two return springs (17) facilitate steering wheel positioning. The screw (5) allows to adjust the meshing of the steering rack (10) with the notched lever (9).


Parts list 
(1) Retaining washer (2) Retaining washer (3) Spring (4) Control lever assembly (5) Adjusting screw (6) Screw (7) Spring (8) Cranked lever (9) Notched lever (10) Steering rack (11) Pin (12) Upper shaft
(13) Retaining washer (14) Pin (15) Arm (16) Brake plate (17) Springs (18) Pin (19) Pin (20) Housing (21) Mobile column (22) Bearings (23) Circlip (24) Screw (25) Stop (26) Ring (27) Ring (28) Fixed column (29) Lower shaft (30) Rings (31) Circlip



Removing and install the steering Column


Using the lever located to the right under the steering wheel, pull the steering column as far as possible towards the driver.
Remove the steering wheel, the instrument panel upper cover and any components that could hinder steering column removal.
Disconnect the control connectors (1) placed under the instrument panel.
Remove the screws (2) fixing the column base to the cab support.
Remove the assembly.
Check all steering column positions function correctly.
Lightly smear the shaft (29) splines with Anti-Seize grease or equivalent.
Tighten the steering wheel nut to a torque of 57 - 78 Nm.
Check the correct operation of electrical equipment.

Removing and installing the control lever assembly


Remove the steering column.
Remove the half housings around the steering column. Remove the Power Control lever and light switch.
Remove and discard the retaining washers (1) (2). Remove the spring (3), lever (4) with seal and lever (8).
Install the levers (4) (8) and spring (3). Refit the retaining washers (1) (2).
Use the adjusting screw (5) to adjust the lever (4) and the T rod in contact with the notched lever (9). Install the steering column.

Removing and install the notched lever and the steering rack


Remove the steering column.
Remove the half housings around the steering column. Remove the Power Control lever and light switch.
Remove and discard the retaining washers (1) (2). Remove the spring (3), lever (4) with seal and lever (8).
Press on the notched lever (9) to compress the spring (7) Take out the screws (6). Remove the steering rack (10).
Drive out the pin (11). Remove the notched lever (9) and the spring (7).
Compress the spring (7). Position the steering rack (10) to avoid it restricting the lever (4). Fit and tighten the screws (6) smeared with Loctite 242 or equivalent.
Install the lever (4), T rod and spring (3). Refit the retaining washers (1) (2).
Use the adjusting screw (5) to adjust the lever (4) and the T rod in contact with the notched lever (9). Install the steering column.

Disassembling and assembling the locking mechanism


Remove the steering column.
Remove the half housings around the steering column.
Take out the adjusting screw (5) (3 mm Allen key). Remove and discard the retaining washer (13).
Drive out the pin (14).
Remove the arm (15) and brake plate (16).
Install the arm (15) and brake plate (16).
Install the pin (14). Refit the retaining washer (13).
Install and adjust the screw (5), lever (4), and T rod in contact with the notched lever (9). Install the steering column.

Replacing shafts and bearings


Remove the half housings around the steering column. Remove the Power Control lever and light switch.
Slide the seal onto the control lever (4).
Press on the notched lever (9) to compress the spring (7) Take out the screws (6). Remove the steering rack (10).
Remove the springs (17).
Loosen the pin (18). Drive out the pins (18) (19).
Separate the housing (20) on the mobile column (21).
Take off circlip (23). Separate the upper shaft (12) from the housing (20).
Drive out the lower shaft (29) of the mobile column (21).
Extract the bearings (22) from the housing (20).

Use a suitable tool to fit the bearings (22) into the housing (20).
Assemble the upper shaft (12) on the bearings (22). Fit the circlip (23).
Assemble the lower shaft (29) fitted with rings (30) and the circlip (31) on the fixed column (28).
Deform the column tube with a punch to lock the rings (30).
Join the housing (20) and mobile column (21) assemblies. Fit the pins (18) (19). Tighten the pin (18). Install the springs (17).



Compress the spring (7). Position the steering rack (10) as shown in picture to avoid it restricting the lever (4). Fit and tighten the screws (6) smeared with Loctite 242 or equivalent.
Use the adjusting screw (5) to adjust the lever (4) and the T rod in contact with the notched lever (9). Install the steering column.

Replacing the guide rings


Remove the half housings around the steering column.
Loosen the screw (5). Remove the brake plate (16).
Remove the screw (24) from the stop (25).
Take out the ring (26).
Split the mobile column (21) from the fixed column (28).
Take out the ring (27).
Position the ring (27).
Install the stop (25) in the groove of the fixed column (28).
Assemble the mobile column (21) with the fixed column (28).
Install the screw (24) without tightening, in order to fit the ring (26). Once the ring is positioned correctly, moderately tighten the screw. Check that the mobile column (21) slides freely.
Install the brake plate (16). Use the adjusting screw (5) to adjust the lever (4) and the T rod in contact with the notched lever (9).