Mercedes 126 Restore – Forgotten Fluids, Half II


In Mercedes 126 Restore: Forgotten Fluids, Half I we appeared on the rear differential. Now let’s flip our consideration to a different fluid that the majority house owners by no means hassle to alter — energy steering fluid.


Most Mercedes 126 house owners won’t ever take aside their recirculating-ball steering gear field. However people who do acquire a new-found appreciation for the significance of fresh fluid within the power-steering system. Along with the primary worm gear meeting and the interface between the ball nut and the sector gear that truly turns the Pitman arm, there are a number of units of needle bearings. All these transferring components are lubricated by regular flows of energy steering fluid. The extra closely contaminated that fluid is, the extra quickly these components will put on. And a worn steering field interprets into sloppy steering, potential security hazards, and an costly restore or substitute. (The facility steering pump, against this, is far, a lot simpler to switch, and good used items could be sourced for as little as $50.)

There was some debate in regards to the propriety of utilizing automated transmission fluid (ATF) on this system. Whereas ATF was specified within the house owners handbook, ATF isn’t what it was once and has develop into considerably hostile to the various seals inside the steering system. Ideally, ATF must be eschewed in favor of plain outdated energy steering fluid. Whereas artificial fluids can be found, typical fluids are completely high-quality.

To alter the fluid, assist the entrance of the automotive on jack stands in order that each entrance wheels are off the bottom. Undo the hose clamp securing the return hose to the return “snorkel” screwed into the pump, and direct the hose into an acceptable container for catching the outdated fluid. Both plug the snorkel or loosen it with a 19mm wrench and switch it in order that it factors upwards, permitting you to fill the reservoir with out shedding fluid from the return becoming. The usual process right here is to start out the engine and add fluid whereas the pump shortly forces the outdated fluid out. However this process has some main disadvantages. It’s most emphatically not a one-man operation. The circulation charge is so quick that there’s a nice threat of the pump operating dry and sucking air except a gentle provide of latest fluid is poured in. If issues get out of hand, you want a helper to close the engine off instantly. If you do not have a helper and do not wish to threat damaging the pump or pulling air into the system, you want a greater means.

Happily, it’s completely doable to pump out the outdated fluid in a extremely managed trend just by turning the steering wheel from cease to cease. Maintain the fluid degree within the reservoir above the filter to forestall the ingress of air, and proceed till you’re happy that the fluid leaving the system via the return hose is clear. You want 2-Three quarts to totally replenish the fluid, although in the event you’re attempting to take away all traces of (crimson) ATF chances are you’ll discover it takes a little bit extra to finish up with a totally clear reservoir. Once you’re completely happy, reconnect the return hose and completely bleed the system by turning the steering wheel backwards and forwards with the engine operating.

That is, in fact, the right alternative to alter the filter within the pump and examine the rubber return hoses, changing if needed. The truth that Mercedes gave us a filter within the energy steering pump tells us one thing in regards to the significance of fresh fluid. What number of different automotive producers do that?