Mercedes 126 Repair – Forgotten Fluids, Part II


In Mercedes 126 Mend: Neglected Fluids, Section I we seemed at the rear differential. Now let&#39s convert our focus to an additional fluid that most homeowners by no means bother to change – electricity steering fluid.


Most Mercedes 126 homeowners will by no means get apart their recirculating-ball steering gear box. But people that do obtain a new-located appreciation for the great importance of thoroughly clean fluid in the electricity-steering system. In addition to the most important worm gear assembly and the interface amongst the ball nut and the sector gear that essentially turns the Pitman arm, there are many sets of needle bearings. All these shifting sections are lubricated by steady flows of electricity steering fluid. The a lot more heavily contaminated that fluid is, the a lot more promptly these sections will wear. And a worn steering box interprets into sloppy steering, possible security dangers, and an highly-priced maintenance or substitute. (The electricity steering pump, by contrast, is considerably, considerably less complicated to replace, and fantastic used models can be sourced for as minor as $ 50.)

There has been some discussion about the propriety of applying automated transmission fluid (ATF) in this system. Though ATF was specified in the homeowners handbook, ATF is not what it used to be and has turn into rather hostile to the lots of seals in the steering system. Preferably, ATF should be eschewed in favor of simple aged electricity steering fluid. Though synthetic fluids are obtainable, standard fluids are properly fine.

To change the fluid, guidance the front of the vehicle on jack stands so that both front wheels are off the floor. Undo the hose clamp secures the return hose to the return “snorkel” screwed into the pump, and direct the hose into a suitable container for catching the aged fluid. Both plug the snorkel or loosen it with a 19mm wrench and convert it so that it points upwards, allowing you to fill the reservoir without losing fluid from the return fitting. The regular method listed here is to start off the motor and increase fluid even though the pump promptly forces the aged fluid out. But this method has some key negatives. It is most emphatically not a a single-person operation. The move fee is so speedy that there is a wonderful chance of the pump functioning dry and sucking air without a steady source of new fluid is poured in. If issues get out of hand, you need to have a helper to shut the motor off suitable away. If you do not have a helper and do not want to chance harming the pump or pulling air into the system, you need to have a improved way.

Thankfully, it is properly feasible to pump out the aged fluid in a highly managed vogue only by turning the steering wheel from quit to quit. Maintain the fluid level in the reservoir previously mentioned the filter to prevent the ingress of air, and continue on until you are content that the fluid leaving the system as a result of the return hose is thoroughly clean. You need to have two-three quarts to absolutely replenish the fluid, while if you&#39re trying to clear away all traces of (crimson) ATF you could find it normally takes a minor a lot more to conclude up with a entirely thoroughly clean reservoir. When you&#39re content, reconnect the return hose and totally bleed the system by turning the steering wheel back and forth with the motor functioning.

This is, of program, the perfect chance to change the filter in the pump and examine the rubber return hoses, replacing if required. The point that Mercedes cave us a filter in the electricity steering pump tells us some thing about the great importance of thoroughly clean fluid. How lots of other vehicle suppliers do this?


Source by Richard M Foster

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