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Home >> Mercedes Benz >> 2021 >> GT 53 AMG >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission (2 Of 2) -- 290 Chassis >> Testing & Repair >> Remove/Install Transmission Oil Pump - AR27.10-P-0400EWM

Remove/Install Transmission Oil Pump - AR27.10-P-0400EWM

Transmission 725.0 (except 725.007/017/037/047), 725.103/163/164 

Shown on transmission 725.0 

G16553079Courtesy of MERCEDES-BENZ USA

Shown on transmission 725.0 

G16553080Courtesy of MERCEDES-BENZ USA
CAUTION Risk of injury  to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.		 AS00.40-Z-0001-01A
Notice  Notes on avoiding damage through contamination and foreign objects   AH00.00-P-5000-01A
Notice  Notes on threaded connections fastened using a tightening angle-based tightening process   AH00.00-P-0020-01A
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
  Notes on automatic transmission   AH27.19-P-0001-01NKB
REMOVING Remove     
1 Fasten transmission onto assembly stand.   AR27.10-P-0600-01EWM 
REFER TO SPECIAL TOOLS 000 588 27 31 00 Assembly stand for cars IMPORTANTCommercially available devices/tools 
Boom crane		 WS01.00-P-0262B
    SPECIAL TOOL Lifting device Fig 6
    SPECIAL TOOL Support fixture Fig 3
2 Unscrew quick-release fastener and collect transmission oil in a suitable container. SPECIAL TOOL Assembly tool Fig 4
3.1 Remove torque converter. Transmission 725.0 (except 725.007/017/037/047/06/091/096/099) AR27.20-P-0050EWM 
    SPECIAL TOOL Assembly device Fig 2
3.2 Remove wet clutch. Transmission 725.06/103/163/164, 725.09 (except 725.095)  
    Transmission 725.163 in model 223, 232, 290 AR27.51-P-0300SCA
    Transmission 725.164 in model 206 with engine 139 AR27.51-P-0300WTF
    Transmission 725.06, 725.09 (except 725.095) AR27.51-P-0300MNE 
    Transmission 725.103 in model 232 with engine 139 AR27.51-P-0300SLX
4 Remove radial shaft sealing ring (4). Transmission 725.0 (except 725.007/017/037/047/06/09) AR27.40-P-0300EWM 
    Transmission 725.06/09
Transmission 725.103/163/164		 AR27.40-P-0300MNE 
5 Remove screws (2, 5).    
6 Remove transmission firewall cover (3). NOTES
Carefully pry off transmission firewall cover (3) at lugs only (arrows).
Otherwise the sealing surfaces will be damaged.		  
7 Remove drive gear (7), chain (8) and oil pump gear (9) together.    
8 Remove seal (6).    
9 Clean sealing surfaces on transmission firewall cover (3) and transmission housing (1). NOTES
When cleaning, make sure that dirt particles do not enter the transmission.
Otherwise, the transmission may be damaged.		  
    Assembly cleaner *BR00.45-Z-1028-04A 
10 Remove oil pump (10) from transmission housing (1).   AR27.10-P-0400-02EWM 
    SPECIAL TOOL Removal and installation tool Fig 5
INSTALLING Install     
11 Check O-rings of the oil pump (10) for damage. If there is damage to the O-rings:
↓
replace oil pump (10).		  
12 Install oil pump (10) into transmission housing (1). SPECIAL TOOL Removal and installation tool AR27.10-P-0400-02EWM 
      Fig 5
13 Slide on drive gear (7), chain (8) and oil pump gear (9) together. NOTES
Check that chain (8) is correctly seated on drive gear (7) and oil pump gear (9).
Otherwise mounting problems may occur.		  
14 Mount new seal (6).    
15 Install transmission firewall cover (3).    
16 Tighten screws (2, 5). TORQUE SPECIFICATION Screw, firewall cover to transmission housing *BA27.10-P-1005-04H 
    TORQUE SPECIFICATION Screw, firewall cover to external plate carrier *BA27.10-P-1006-04H 
17 Install new radial shaft sealing ring (4). Transmission 725.0 (except 725.007/017/037/047/06/09) AR27.40-P-0300EWM 
    Transmission 725.06/09
Transmission 725.103/163/164		 AR27.40-P-0300MNE 
18.1 Install torque converter. Transmission 725.0 (except 725.007/017/037/047/06/091/096/099) AR27.20-P-0050EWM 
    Grease, silicone-based, 100 g *BR00.45-Z-1008-06A 
    SPECIAL TOOL Assembly device Fig 2
    SPECIAL TOOL Parallel rest Fig 1
18.2 Install wet clutch. Transmission 725.06/103/163/164, 725.09 (except 725.095)  
    Transmission 725.163 in model 223, 232, 290 AR27.51-P-0300SCA
    Transmission 725.164 in model 206 with engine 139 AR27.51-P-0300WTF
    Transmission 725.06, 725.09 (except 725.095) AR27.51-P-0300MNE 
    Transmission 725.103 in model 232 with engine 139 AR27.51-P-0300SLX
19 Screw in quick-release fastener of oil pan. IMPORTANT Replace seal.  
    SPECIAL TOOL Assembly tool Fig 4
20 Detach transmission from assembly stand.    
REFER TO SPECIAL TOOLS 000 588 27 31 00 Assembly stand for cars IMPORTANTCommercially available devices/tools 
Boom crane		 WS01.00-P-0262B
    SPECIAL TOOL Lifting device Fig 6
    SPECIAL TOOL Support fixture Fig 3
21 Fill transmission with transmission oil. Transmission 725.0 (except 725.007/017/037/047)
Transmission 725.035/038/085
Transmission 725.103/163/164		 AR27.00-P-0270EWN 
AUTOMATIC TRANSMISSION COMPLETE

Number Designation Transmission 725.0 Transmission 725.1
BA27.10-P-1005-04H Screw, firewall cover to transmission housing M8 Stage 1 Nm 10 10
Stage 2 ∠° 90 90
AUTOMATIC TRANSMISSION COMPLETE

Number Designation Transmission 725.0 Transmission 725.1
BA27.10-P-1006-04H Screw, firewall cover to external plate carrier M6 Nm 10 10
Fig 1: Identifying Parallel Rest (126 589 04 31 00)
G16163157Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Assembly Device (725 589 01 31 00)
G16163158Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Support Fixture (725 589 00 40 00)
G16163159Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Assembly Tool (725 589 02 90 00)
G16163160Courtesy of MERCEDES-BENZ USA
Fig 5: Identifying Removal And Installation Tool (725 589 00 59 00)
G16163149Courtesy of MERCEDES-BENZ USA
Fig 6: Identifying Lifting Device (724 589 02 63 00)
G16163162Courtesy of MERCEDES-BENZ USA
REPAIR MATERIALS

Number Designation Order number
BR00.45-Z-1008-06A Grease, silicone-based, 100 g A 001 989 28 51
BR00.45-Z-1028-04A Assembly cleaner A 000 986 56 01
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