Door and reversing system - function test

AP72.40-T-7250C

Door and reversing system - function test

13.3.00



Check

Danger!

Risk of injury to fingers being jammed or squeezed when removing and installing or aligning hoods, doors, tailgate/tailgate and sliding roof.

When moving components, ensure that no body parts or limbs are in the motion area.

AS00.00-Z-0011-01A

Danger!

Risk of accident as vehicle may start off by itself with the engine running. Risk of injury as working around the engine during start-up or while running may result in contusions and burns

Secure vehicle to prevent it from moving off by itself.
Wear closed and tight-fitting work clothes.
Do not grasp hot or rotating parts.

AS00.00-Z-0005-01A

1

Start engine and fill compressed air system.

 Alternatively, fill compressed-air system using an external air supply.

 Ensure required operating pressure is maintained throughout entire test. Operating pressure can only be determined indirectly using display units of service brake (min 8 bar).



Front doors

2

Unlock door lock (1) from the outside using key and press external pushbutton (2).

 The door must open smoothly within 4 to 6 seconds.

3

Close and open the door from the inside using the pushbutton switch (5).

 The door must close smoothly within 4 to 6 seconds and open again within the same time span.

The indicator lamp in the corresponding pushbutton switch must extinguish when the door is closed. The indicator lamp in the pushbutton switch comes on:
 when the door is open,
 when the door is not closed completely,
 when the emergency cock cover is open,
 after actuating the emergency cock,
 if the pressure in the door closing system is too low.



Rear doors

4

Unlock door lock (1) from the outside using key and press external pushbutton (2).

 The door must open smoothly within 4 to 6 seconds.

5

Close the door from the inside using the pushbutton switch (6).

 The door must close smoothly within 4 to 6 seconds and open again within the same time span.

The indicator lamp in the corresponding pushbutton switch must extinguish. The indicator lamp in the pushbutton switch comes on:
 when the door is open,
 when the door is not closed completely,
 when the emergency cock cover is open,
 after actuating the emergency cock,
 if the pressure in the door closing system is too low.



Reversing

6

Close front doors and hold test piece between doors and door frame half way up the door .

 The door must return to the open position (reverse).

 The reversing device must function up to

30 mm before the doors are closed completely.



Test piece for door reversing equipment

WF58.50-T-7240-01A

7

Repeat test procedure with test piece approx. 150 mm above bottom edge of the door.

 The doors must return to the open position (reverse).

8

Repeat test procedure at rear door.



Inside emergency switch actuation

9

Open emergency cock cover (3) and turn emergency cock (4) for front door to emergency position.

 The indicator lamp in the corresponding pushbutton switch must come on.

The warning buzzer must sound when engine is running.

It must be possible to open and close the door by hand with little resistance.

10

Turn the emergency cock (4) to the driving position and close the emergency cock cover (3).

 The door must open smoothly within 4 to 6 seconds.
The door must open or close, depending on whether the emergency cock was actuated with the door open or closed.

11

Repeat test procedure at rear door.

 The warning buzzer must also sound at the rear entrance when the engine is running.

12

Install new lead seal on emergency cock cover.

13

Switch off engine

14

Close doors.

 Using wrench or pushbutton switch.