Genuine Mercedes-Benz 190E Power Steering Pump

Mercedes-Benz 190E Power Steering Pump Parts and Q&A

• Power Steering Pump
  201-460-15-80-81
  Q: How to remove and refit the power steering pump on Mercedes-Benz 190E?

  A:

  To disassemble the PAS for models produced before October 1984, loosen the top of the PAS pump fluid reservoir by unscrewing and removing cap, then loosen the long stud nut to the middle of the fluid reservoir by unscrewing and removing the pressure spring. Take out the filter cartridge and draw out all the PAS fluid in the reservoir with a clean syringe or poultry baster. Disassembble the unions, remove the unions of the pump side, delivery and return fluid pipes and be ready to leak so as not to contaminate the underside of the pipes. Slack the toothed adjuster bolt on the rear of the pump mounting bracket to unload the force on the drive belt, and remove the drive belt over the pump pulley. Unscrew the three bolts so as remove the pulley on the pump shaft, then unscrew the two mounting bolts on the back of the pump mounting bracket and reclaim the threaded retaining plate on the front. Take off the lock bolt on the back of a pump, salvage the locking nut and tooth-set adjuster, and then dismantle the pump itself out of the engine. To respond to refitting, reverse the steps of removal, aiming to regulate the stretch of the drive belt, when tightening the pressure spring and nut of the filter cartridge, and to be sufficiently not tight enough, fill the reservoir with the corresponding fluid, and check the level of this fluid after switching on and turning the steering wheel and locking it to the stops respectively to the left and right. In models dating forward to October 1984, the parking brake should be firmly applied, the front of the car jacked up, and it then placed on axle jack stands. Loosen the drive belt tension and remove the drive belt off the pump pulley, but be sure the screwing pivot holding the pulley is loosened. Should it be required empty the air inlet hose temporarily to have a good view of the pump and unscrew the related retaining bolts and unscrew the pulley whilst keeping note of the orientation. Wipe off the place under the pump unions, label the hydraulic pipes and hoses, loosen the union nuts, and pop the hoses off, taking precautions against the atmosphere spewing forward the fluid, and holding the container ready to receive the fluid. As necessary, remove the support bracket off the back of the pump, loosen the power steering pump mounting bolts, and remove them to remove the pump assembly out of the engine compartment. In case the pump is defective, contact a Mercedes-Benz dealer and obtain spare parts or an overhaul or an exchange option. To refit, loosely fit the mounting bolts to the required torque, reconnect hose with the marks made during the removal process, refit pulley to the required position, attach the drive belt and tension it, and lastly refill pump and bleed hydraulic system.