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Home >> Mercedes Benz >> 2018 >> 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-0030RX

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

ENGINE 276 in MODEL 231 

with CODE 487 (Active Body Control (ABC)) 

Fig 1: Active Body Control Hydraulic Pump Remove/Install Components (1 Of 2)
G11128719Courtesy of MERCEDES-BENZ USA
Fig 2: Active Body Control Hydraulic Pump Remove/Install Components (2 Of 2)
G11128720DANGERDANGERNOTESIMPORTANTIMPORTANTREMOVINGINSTALLINGTORQUE SPECIFICATIONSPECIAL TOOLIMPORTANTIMPORTANTINSTALLATION IMPORTANTSPECIAL TOOLIMPORTANTINSTALLATION IMPORTANTTORQUE SPECIFICATIONSPECIAL TOOLTORQUE SPECIFICATIONIMPORTANTTORQUE SPECIFICATIONTORQUE 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 front engine cover (1)    
2 Slacken bolts (2) of belt pulley (3) TORQUE SPECIFICATION Bolt, belt pulley to hydraulic pump *BA32.00-P-1006-01B 
3 Extract oil from Active Body Control (ABC) expansion reservoir (4) SPECIAL TOOL Hand pump Figure
4 Remove poly-V belt (5)   AR13.20-P-0001RKA
5 Remove Active Body Control (ABC) hydraulic pump (6) belt pulley (3)    
6 Disconnect electrical connector (7)    
7 Detach electrical connection (8) from ABC intake throttle valve (Y86/1) and expose electrical line (9)    
8 Pull ME-SFI [ME] control unit (N3) and mount (10) out of bracket (10) and place to one side IMPORTANT With connected electrical lines.  
9 Detach Active Body Control (ABC) (11) feed line to Active Body Control (ABC) (6) hydraulic pump and set aside IMPORTANT Seal openings using stop plugs.
INSTALLATION IMPORTANT Note installation position of Active Body Control ABC feed line (11).
SPECIAL TOOL Record plug
Figure
10 Detach Active Body Control (ABC) pressure line (12) from Active Body Control (ABC) hydraulic pump (6) IMPORTANT Detach Active Body Control (ABC) pressure line (12) at the earliest 10 minutes after switching off the engine, because only then will the ABC system be fully unpressurized. Seal openings using stop plugs.
INSTALLATION IMPORTANT Replace sealing rings of Active Body Control (ABC) pressure line (12).
TORQUE SPECIFICATION Bolt, hydraulic line to hydraulic pump
*BA32.00-P-1008-01B 
    SPECIAL TOOL Record plug Figure
11 Remove screw (13) TORQUE SPECIFICATION Bolt, hydraulic pump to timing case *BA32.00-P-1002-01B 
12 Remove screw (14) IMPORTANT Bolt (14) can only be removed with locked poly-V belt tensioning device.
TORQUE SPECIFICATION Bolt, hydraulic pump to timing case
*BA32.00-P-1002-01B 
13 Remove bolt (15) and remove Active Body Control (ABC) (6) hydraulic pump upwards TORQUE SPECIFICATION Bolt, carrier for hydraulic pump to cylinder crankcase *BA32.00-P-1003-01B 
14 Install in the reverse order    
15 Fill and bleed active body control (ABC)   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
16 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 276
BA32.00-P-1006-01B Bolt, belt pulley to hydraulic pump Nm 30
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 276
BA32.00-P-1002-01B Bolt, hydraulic pump to timing case Nm 35
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 276
BA32.00-P-1008-01B Bolt, hydraulic line to hydraulic pump Nm 8
HYDRAULIC PUMP

Number Designation MODEL 231 with ENGINE 276
BA32.00-P-1003-01B Bolt, carrier for hydraulic pump to cylinder crankcase Nm 35
Fig 3: Identifying Record Plug (129 589 00 91 00)
G11065549Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Hand Pump (210 589 00 71 00)
G07742725Courtesy of MERCEDES-BENZ USA