Remove/install level control valve unit · ar3231p0650rt · Mercedes-Benz WIS

AR32.31-P-0650RT

Remove/install level control valve unit

3.5.12

MODEL 251

P32.31-2086-09

Shown on model 251 with code (489) AIRmatic (air suspension with level adjustment and adaptive damping system ADS),

1 Pressure line connections

2 Electrical connector

3 Bolts

4 Bolts

Y36 AIRmatic valve unit

Pressure line connections:

HR To right rear suspension strut

RL To left rear suspension strut

P to AIRmatic compressor unit

SP to central reservoir

FR to right front suspension strut

FL to left front suspension strut

P32.33-2017-06

Shown on model 251 with code (488) Steel/air suspension

Y36/8 Electronic rear axle level control valve unit

Pressure line connections:

HR To right rear suspension strut

RL To left rear suspension strut

P to AIRmatic compressor unit

Modification notes

18.8.08

Remove front bumper, unscrew bolts, added

Operation steps 1 and 5

AR88.20-P-2000RT

 	Remove/install
 Danger!	Risk of death caused by vehicle slipping or toppling off of the lifting platform	Align vehicle between columns of vehicle lift and position four support plates at vehicle lift support points specified by vehicle manufacturer.	AS00.00-Z-0010-01A
	Notes on AIRmatic		AH32.22-P-1000-02RT
1	Remove front bumper		AR88.20-P-2000RT
2	Empty air suspension system using STAR DIAGNOSIS
	Connect STAR DIAGNOSIS and read out fault memory		AD00.00-P-2000-04A
3	Disconnect electrical connector (2)
4	Unscrew pressure line connection (1)	 Observe color coding on the pressure lines and the pressure line assignment at the valve unit (Y36 or Y36/8) in order to guarantee faultless function of the suspension.
		 Seal off pressure lines with blind plugs for the duration of the repair work.
			*BA32.22-P-1003-03C
		 Set of stop plugs	*129589009100
		 Socket wrench bit	*211589000900
		 Knife	*000589122800
		Leak detection spray	*BR00.45-Z-1002-03A
		for USA	*BR00.45-Z-1004-03A
		 If pressure line connections or pressure lines are damaged, see: 
		Repair pressure line connection, see Repair AIRmatic pressure line connection	AR32.22-P-2001-02RT
		 Socket wrench bit	*211589000900
		 Knife	*000589122800
		Leak detection spray	*BR00.45-Z-1002-03A
		for USA	*BR00.45-Z-1004-03A
5	Remove bolts (4)	 Secure valve unit (Y36 or Y36/8) against falling down.
6	Remove bolts (3) and detach valve unit (Y36 or Y36/8)	 Use a suitable tool.
7	Remove valve unit (Y36 or Y36/8)
8	Install in the reverse order
9	Fill air suspension system using STAR DIAGNOSIS	 The wheels must not make contact with the floor when filling as the air spring bellows in the suspension strut will be irreparably damaged if the system is filled with the suspension compressed.
	Checking
10	Check air suspension system for leaktightness	Refer to:
		Check AIRmatic for leaks	AR32.22-P-8100RT

 Air suspension

Number	Designation			Model 251 with all-round level control system (code 489)	Model 251 without all-round level control system (code 489)


BA32.22-P-1003-03C	Pressure line of air suspension to valve unit	dia. 4 mm	Nm	2	2
		Ø 6 mm	Nm	3.5	3.5

000 589 12 28 00

Wrench socket

Slitting knife

Set of stop plugs

129 589 00 91 00

211 589 00 09 00

Repair materials

Number

Designation

Order number

BR00.45-Z-1002-03A

Leak detection spray

Christof Fischer GmbH,
Augsburger Str. 289-293,
70327 Stuttgart
Germany
Tel. +49 711 30502-0
Fax +49 711 30502-10
www.kaeltefischer.de

BR00.45-Z-1004-03A

Leakage spray for USA

LIQUI MOLY
Gary Boyd
1820 Clark Avenue

Long Beach, CA 90815
USA
Tel. +1 562 5975519

Fax + 1 562 5975269
www.liqui-moly.com

Referenced documents

ad0000p200004a Connect STAR DIAGNOSIS and read out fault memory
ad0000p200004a
ah3222p100002rt Notes on AIRmatic
ar3222p200102rt Repairing AIRmatic pressure line connection
ar3222p8100rt Check AIRmatic for leaks
ar8820p2000rt Remove/install front bumper
as0000z001001a Risk of death caused by vehicle slipping or toppling off of the lifting platform.