Disassemble/assemble multi-disk brake B3 - AR27.50-P-0890W

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TRANSMISSION 722.9, 724.2

MODIFICATION NOTES

26.8.14	"Remove main components of the transmission" added.	Operation step 1
26.8.14	"Install main components of the transmission" added.	Step 26

Fig 1: Multi-Disk Brake B3 Components (1 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 2: Multi-Disk Brake B3 Components (2 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 3: Multi-Disk Brake B3 Components (3 Of 3)

Courtesy of MERCEDES-BENZ USA

	Notes on automatic transmission		AH27.19-P-0001-01NKB
	Remove
1	Remove main components of transmission		AR27.50-P-0610W
	Disassemble
2	Remove retaining ring (105s) and end disk (105)
3	Remove clutch pack (5) and disk spring (5t)	Check individual disks for scorch marks and wear, if necessary: ↓ Replace clutch pack (5).
4	Place multidisk brake into lever press	Workshop press (stationary)
5	Place thrust device onto disk spring (15t) in external plate carrier (15a)	Position thrust device precisely (see arrow in second picture) to enable retaining ring (15s) to be removed later.
		Pressing tool	Figure
		Set of drifts	Figure
6	Actuate lever press until retaining ring (15s) is exposed	Stop lever press stoke as soon as accessibility to groove is sufficient. Otherwise excessive clamping forces will result in damage to the plate carrier.
7	Remove retaining ring (15s) from groove
8	Move back lever press
9	Remove thrust device and multidisk brake from lever press
10	Remove retaining ring (15s)
11	Remove disk spring (15t)
12	Remove piston (15k) from external plate carrier (15a)	Check vulcanized seal.
	Check
13	Check external plate carrier (15a) for wear and damage	Depending on the production date, an external plate carrier without inner phase (1) or an external plate carrier with inner phase (2) is installed (see third picture). This is why it is necessary to note the parts information in the EPC later on when installing a new retaining ring (15s).
	Assemble
14	Install piston (15k)
15	Install disk spring (15t)	Insert disk spring (15t) in such a way that the curvature of the inner circumference points toward the piston (15k).
16	Fit retaining ring (15s)	Always note parts information in the EPC. Otherwise proper operation of the multidisk brake cannot be ensured. Final installation is only possible when the lever press is actuated.
17	Place multidisk brake into lever press
18	Place thrust device on disk spring (15t)	Position thrust device precisely (see arrow in second picture) to enable retaining ring (15s) to be installed.
		Pressing tool	Figure
		Set of drifts	Figure
19	Actuate lever press until groove of retaining ring (15s) is exposed	Stop lever press stoke as soon as accessibility to groove is sufficient. Otherwise excessive clamping forces will result in damage to the plate carrier.
20	Install retaining ring (15s)	Note the installation position of the retaining ring (15s). If incorrectly installed the disk spring (5t) jams and malfunctions occur.
21	Move back lever press
22	Remove thrust device and multidisk brake from lever press
23	Install disk spring (5t) and disk pack (5) into external plate carrier (15a)	Insert disk spring (5t) in such a way that curvature of the inner circumference points toward the piston (15k). Observe insertion sequence when inserting disks: ↓ Survey of multi-disk components, production details
		TRANSMISSION 722.9	GF27.51-P-5200W
24	Install end disk (105) and retaining ring (105s)
25	Measure and adjust clearance	TRANSMISSION 722.9, 724.2 Multidisk brake B1, B2, B3 and multidisk clutch K1, K2, K3	AR27.51-P-7229W
	Install
26	Install main components of transmission		AR27.50-P-0610W

Fig 4: Identifying Set Of Drifts (722 589 04 15 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Pressing Tool (722 589 01 31 00)

Courtesy of MERCEDES-BENZ USA