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Home >> Mercedes Benz >> 2014 >> SL550 >> Repair and Diagnosis >> Suspension >> Rear Suspension >> Suspension - 231 Chassis >> Testing & Repair >> Remove/install Active Body Control hydraulic pump >> Remove/install Active Body Control hydraulic pump - AR32.50-P-0030RY

Remove/install Active Body Control hydraulic pump - AR32.50-P-0030RY

ENGINE 279 in MODEL 231 

with CODE 487 (Active Body Control (ABC)) 

Fig 1: Active Body Control Hydraulic Pump Remove/Install Components
G11128723DANGERDANGERNOTESIMPORTANTIMPORTANTREMOVINGINSTALLINGIMPORTANTTORQUE SPECIFICATIONSPECIAL TOOLIMPORTANTSPECIAL TOOLIMPORTANTINSTALLATION IMPORTANTTORQUE SPECIFICATIONSPECIAL TOOLTORQUE SPECIFICATIONTORQUE SPECIFICATIONTORQUE SPECIFICATIONIMPORTANTTORQUE SPECIFICATIONDANGERCourtesy of MERCEDES-BENZ USA
DANGER Risk of injury  caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. No parts of the body or limbs should be within the operating area when the components are moving. AS00.00-Z-0011-01A
DANGER Risk of injury  to skin or eyes from hydraulic fluid spraying out under pressure. Risk of poisoning  from swallowing hydraulic fluid. Depressurize hydraulic system completely before starting any work on it. Wear protective clothing and safety glasses. AS00.00-Z-0013-01A
NOTES Notes on fitting hydraulic lines and hoses   AH32.50-P-0001-02A
IMPORTANT Notes on Active Body Control suspension   AH32.50-P-0001-01LF
IMPORTANT Notes on Active Body Control suspension   AH32.50-P-0001-01N
REMOVINGINSTALLING Remove/install     
1 Remove poly-V belt   AR13.20-P-0001RKC
2 Remove left air filter housing (4)    
3 Remove bolt (1) from support brace (2) IMPORTANTRemoval:  From the vehicle underside.  
    TORQUE SPECIFICATION Bolt, support for hydraulic pump to intermediate housing for oil lines/carrier for hydraulic pump *BA32.00-P-1012-01B 
4 Extract oil from Active Body Control (ABC) expansion reservoir (3) SPECIAL TOOL Hand pump Figure
5 Unhook hose (5) of crankcase ventilation system from holder (6) and place to one side    
6 Unclip electrical connector (7) from holder (6)    
7 Unscrew bolts (8) and remove holder (6)    
8 Disconnect electrical connector from ABC intake throttle valve (Y86/1)    
9 Detach Active Body Control (ABC) feed line (11) from Active Body Control (ABC) hydraulic pump (10) and place to one side IMPORTANT Seal openings using stop plugs. Note installation position of Active Body Control ABC feed line (11).
SPECIAL TOOL Record plug
Figure
10 Detach Active Body Control (ABC) pressure line (9) between Active Body Control (ABC) hydraulic pump (10) and valve unit from Active Body Control (ABC) hydraulic pump (10) IMPORTANT Detach the Active Body Control (ABC) pressure line (9) at the earliest 10 minutes after switching off the engine; only then will the ABC system be fully unpressurized. Seal openings using stop plugs.
INSTALLATION IMPORTANT Replace the sealing rings of the Active Body Control (ABC) pressure line (9).
TORQUE SPECIFICATION Bolt, hydraulic line to hydraulic pump
*BA32.00-P-1008-01B 
    SPECIAL TOOL Record plug Figure
11 Undo bolts (12) securing bracket (13) to timing case TORQUE SPECIFICATION Bolt, bracket for hydraulic pump to cylinder head *BA32.00-P-1010-01B 
12 Remove bolt (14) securing bracket (13) of Active Body Control (ABC) hydraulic pump (10) TORQUE SPECIFICATION Bolt, bracket and hydraulic pump to timing case *BA32.00-P-1011-01B 
13 Remove bolt (15) and lift out Active Body Control (ABC) hydraulic pump (10) until electrical connector on ABC pressure relief valve (Y86) is accessible TORQUE SPECIFICATION Bolt, hydraulic pump to cylinder crankcase *BA32.00-P-1009-01B 
14 Disconnect electrical connector from ABC pressure relief valve (Y86) and lift out Active Body Control (ABC) hydraulic pump (10)    
15 Detach belt pulley (16) from Active Body Control (ABC) hydraulic pump (10) IMPORTANT When replacing the Active Body Control (ABC) hydraulic pump (10).
TORQUE SPECIFICATION Bolt, belt pulley to hydraulic pump
*BA32.00-P-1006-01B 
16 Install in the reverse order    
17 Fill up and vent the Active-Body-Control (ABC) system   AR32.50-P-0021SX 
DANGER Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
18 Carry out engine test run, while doing so check Active Body Control (ABC) for proper operation and leaktightness    
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 279
BA32.00-P-1006-01B Bolt, belt pulley to hydraulic pump Nm 30
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 279
BA32.00-P-1008-01B Bolt, hydraulic line to hydraulic pump Nm 15
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 279
BA32.00-P-1009-01B Bolt, hydraulic pump to cylinder crankcase Nm 9
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 279
BA32.00-P-1010-01B Bolt, bracket for hydraulic pump to cylinder head Nm 20
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 279
BA32.00-P-1011-01B Bolt, bracket and hydraulic pump to timing case Nm 20
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 279
BA32.00-P-1012-01B Bolt, support for hydraulic pump to intermediate housing for oil lines/carrier for hydraulic pump Nm 20
Fig 2: Identifying Record Plug (129 589 00 91 00)
G11065549Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Hand Pump (210 589 00 71 00)
G07742725Courtesy of MERCEDES-BENZ USA