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Dismantling and assembling clutch K1 - AR27.51-P-0800W

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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. Operation step 25  
Fig 1: Clutch K1 Components (1 Of 2)
G09975856Courtesy of MERCEDES-BENZ USA
Fig 2: Clutch K1 Components (2 Of 2)
G09975857Courtesy of MERCEDES-BENZ USA
IMPORTANT Notes on automatic transmission   AH27.19-P-0001-01NKB
REMOVING Remove     
1 Remove main components of transmission   AR27.50-P-0610W 
DISASSEMBLING Disassemble     
2 Remove retaining ring (105s) and end disk (105)    
3 Remove clutch pack (5) and disk spring (5t) IMPORTANT Check disks for scorch marks and wear.  
4 Place multidisk clutch in lever press Workshop press (stationary)  
5 Place thrust device on piston cover (14b) IMPORTANTSPECIAL TOOL Position the thrust device precisely to enable the retaining ring (14s) to be removed later.  
SPECIAL TOOL Set of drifts Figure
SPECIAL TOOL TRANSMISSION 722.9 (except 722.93), 724.2
Pressing tool
Figure
SPECIAL TOOL TRANSMISSION 722.93
Pressing tool
Figure
6 Actuate lever press until retaining ring (14s) is exposed NOTES Stop lever press stoke as soon as accessibility to groove is sufficient.
Excessive clamping force will damage the plate supports.
 
7 Remove retaining ring (14s) from groove    
8 Move back lever press    
9 Take thrust device and multidisk clutch out of lever press    
10 Remove retaining ring (14s) and piston cover (14b)    
11 Remove spring support (14f)    
12 Remove piston (14k) Check vulcanized seal for damage and wear, if necessary:

Replace piston (14k).
 
ASSEMBLING Assemble     
13 Install piston (14k)    
14 Insert spring support (14f)    
15 Insert piston cover (14b)    
16 Fit retaining ring (14s) IMPORTANT Final installation is only possible when the lever press is actuated.  
17 Place multidisk clutch in lever press    
18 Place thrust device on piston cover (14b) IMPORTANTSPECIAL TOOL Position the thrust device precisely to enable the retaining ring (14s) to be removed later.  
SPECIAL TOOL Set of drifts Figure
SPECIAL TOOL TRANSMISSION 722.9 (except 722.93), 724.2
Pressing tool
Figure
SPECIAL TOOL TRANSMISSION 722.93
Pressing tool
Figure
19 Actuate lever press until groove (arrow) is exposed, and install retaining ring (14s) NOTES Stop lever press stoke as soon as accessibility to groove is sufficient.
Excess force will otherwise cause damage.
IMPORTANT Pay attention to the installation position of the retaining ring (14s).
 
20 Move back lever press    
21 Take thrust device and multidisk clutch out of lever press    
22 Install disk spring (5t) and disk pack (5) in external plate carrier (14a) IMPORTANT Insert the disk spring (5t) in such a way that the curvature of the inner circumference points toward the piston (14k).
Observe the installation sequence:

Survey of multi-disk components, production details
 
REFER TO BASIC KNOWLEDGE TRANSMISSION 722.9 GF27.51-P-5200W
23 Install end disk (105) and retaining ring (105s)    
MEASURING Measure     
24 Measure and adjust clearance TRANSMISSION 722.9, 724.2 Multidisk brake B1, B2, B3 and multidisk clutch K1, K2, K3 AR27.51-P-7229W 
INSTALLING Install     
25 Install main components of transmission   AR27.50-P-0610W 
Fig 3: Identifying Pressing Tool (208 589 00 21 00)
G09975858Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Set Of Drifts (722 589 04 15 00)
G09975859Courtesy of MERCEDES-BENZ USA
Fig 5: Identifying Pressing Tool (722 589 01 31 00)
G09975860Courtesy of MERCEDES-BENZ USA