Dismantling and assembling multi-disk brake B1 - AR27.50-P-0870A

TRANSMISSION 722.6

Fig 1: Disassembled View Of Multi-Disk Brake B1

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

25.8.98	New special tool for setting clearance		AR27.50-P-0870-01A
16.9.02	Multi-disks for B1, K1 and K3 changed	Transmission 722.6 as of 02.09.02, refer to step 10.	BT27.50-P-0013-01A

	Dismantling
1	Remove snap ring (6h)
2	Remove multi-disk pack (6g) and spring washer (6f) from external plate carrier	Check multi-disks for scorch marks and wear.
3	Place assembly device (073) on spring washer (6d) and tension until the snap ring (6e) is exposed	Assembly device	Fig 2
4	Remove snap ring (6e)
5	Remove piston (6c) from the external plate carrier by carefully blowing compressed air into the bore (A).
	Assemble
6	Install piston (6c) in external plate carrier	Inspect molded gasket, replace if necessary. Press in the piston with the assistance of the spring washer (6d) and the assembly device (073).
7	Insert spring washer (6d)	Insert spring washer with the curvature towards the multi-disk pack.
8	Place assembly device (073) on spring washer (6d) and tension until the groove of the snap ring is exposed	Assembly device	Fig 2
9	Insert snap ring (6e)	The collar of the snap ring must point towards the multi-disk pack. After installing, check snap ring for correct seat
10	Insert spring washer (6f) and multi-disk pack (6g) in the external plate carrier and measure	Observe outer multi-disk sequence Inserting and measuring multi-disk pack B1:↓
		TRANSMISSION 722.6 up to 01.09.02	AR27.50-P-0870-01A
		Pressing tool	Fig 3
		Clearance of multi-disk brake B1	*BE27.50-P-1001-02B
		Transmission 722.6 as of 02.09.02	AR27.50-P-0870-01AA
		Pressing tool	Fig 3
		Clearance of multi-disk brake B1	*BE27.50-P-1001-02B
	Thickness of steel multi-disks B1, K1 and K2 changed	Transmission 722.6	BT27.51-P-0002-01A
	External plate carrier B1 modified	Transmission 722.6	BT27.50-P-0008-01A
	Multi-disks for B1, K1 and K3 changed	Transmission 722.6 as of 02.09.02	BT27.50-P-0013-01A
	Survey of multi-disk components, production details	Transmission 722.6	GF27.51-P-5200A
11	Insert snap ring (6h)	For additional work, see:
11	Insert snap ring (6h)	Remove/install multi-disk brake B1 and oil pump	AR27.50-P-0721A

ADJUSTMENT VALUES OF MULTI-DISK CLUTCH

Number	Designation				Transmission 722.6 up to 01.09.02 with double sided multi-disks	Transmission 722.6 as of 02.09.02 with single-sided multi-disks
BE27.50-P-1001-02B	Clearance of multi-disk brake B1	Number of multi-disks	2	mm	2.30...2.70	2.20...2.60
			3	mm	2.70...3.10	2.40...2.80
			4	mm	3.00...3.40	2.60...3.00

Fig 2: Identifying Assembly Device (140 589 13 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Pressing Tool (208 589 00 21 00)

Courtesy of MERCEDES-BENZ USA