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Home >> Mercedes Benz >> 2003 >> CLK430 >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Seats, Restraint Systems -- 208 Chassis >> Basic Knowledge >> Roll bar hydraulics, function - GF91.53-P-3000KA

Roll bar hydraulics, function - GF91.53-P-3000KA

Models 208.435 /444 /445 /447 /448 /465 /470 

Depiction of lowered roll bar 

Fig 1: Identifying Roll Bar Hydraulics Function Diagram (Depiction Of Lowered Roll Bar)
G04729731

Raise roll bar (for manual actuation only) 

The hydraulic unit's motor (A7/5m1)  starts to run, the rod side valve (Y57y10)  and piston side valve (Y57y11)  switch:

The two lock pawls have pressure applied to them and are thus swiveled away from the gear rack. The roll bar's hydraulic cylinder has pressure applied to it at both the piston and rod sides and is then raised.

Lower roll bar 

The hydraulic unit's motor (A7/5m1)  starts to run, the rod side valve (Y57y10)  switches:

The two lock pawls have pressure applied to them and are swiveled away from the gear rack. The roll bar's hydraulic cylinder has pressure applied to it at the rod side and is then lowered.

REFER TO BASIC KNOWLEDGE Roll bar manual actuation, function   GF91.59-P-2000KA 
REFER TO BASIC KNOWLEDGE Roll bar/soft top operation control module, location/task/design/function   GF77.39-P-3100KA
REFER TO BASIC KNOWLEDGE Roll bar/soft top operation hydraulic unit, location/task/design/function   GF77.30-P-3100KA
REFER TO BASIC KNOWLEDGE Roll bar valve block, location/task/design/function   GF91.53-P-2200KA 
REFER TO BASIC KNOWLEDGE Hydraulic cylinder roll bar, location/task/design/function   GF91.53-P-2100KA