Mercedes-Benz Parts Catalog Mercedes-Benz Accessories Catalog Mercedes-Benz Technical Articles Mercedes-Benz Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
Bookmark and Share

Pelican Technical Article:

Replacing the Power Steering Fluid

Mike Holloway

Time:

1 hour1 hr

Tab:

$10 to $40

Talent:

**

Tools:

13mm socket, breaker bar, 17mm open end wrench, 19mm open end wrench

Applicable Models:

Mercedes-Benz 450SL (1975-80)

Parts Required:

Power steering fluid

Hot Tip:

Fluid receptacle beneath car

Performance Gain:

Improved steering

Complementary Modification:

Replace power steering fluid filter

The most thorough way to replace the power steering fluid is to also remove and clean the power steering pump and fully drain the lines. The pump also holds the fluid. The power steering pump is located on the upper left side of the engine.

When removing the pump you will first need to remove the negative battery cable and keep the cable end from touching any metal surface. There is also a battery removal article to consult should you have any questions.

When replacing the fluid you will need to remove the two steering lines connected to the pump, one is 17mm and the other is 19mm. Before you remove the lines make sure you get as much fluid out of the reservoir as possible. You can use a turkey baster or small hand pump to suck out as much fluid as you can. With the reservoir empty remove the two lines. Some fluid will still drain out so be ready for it. With the fluid and lines removed remove the three 13mm nuts and bolts holding the pump to the bracket.

Before you do any work on your car it is important that you wear safety glasses, work gloves and dispose of all fluids in a safe manner. Coolant is poisonous and should be treated as such. Animals and small children have been known to die from ingesting coolant. If you have to jack up your car, make sure to use jack stands and chock your wheels as well as applying the parking brake. Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability. Always wear eye and hand protection. Disconnect the battery before working on your car.

Loosen and remove the cover to the power steering fluid pump.
Figure 1

Loosen and remove the cover to the power steering fluid pump.

Remove the cover and check the level of fluid in the reservoir.
Figure 2

Remove the cover and check the level of fluid in the reservoir.

Using a hand pump or a turkey baster, remove as much of the power steering fluid as possible.
Figure 3

Using a hand pump or a turkey baster, remove as much of the power steering fluid as possible.

Using a 13mm socket on a breaker bar, loosen and remove the top bolt that holds the pump.
Figure 4

Using a 13mm socket on a breaker bar, loosen and remove the top bolt that holds the pump.

Using a 13mm socket on a breaker bar, loosen and remove the bottom bolt that is used to tighten the tension of the power steering belts.
Figure 5

Using a 13mm socket on a breaker bar, loosen and remove the bottom bolt that is used to tighten the tension of the power steering belts. .

Using a 13mm socket on a breaker bar, loosen and remove the bottom bolt that holds the pump.
Figure 6

Using a 13mm socket on a breaker bar, loosen and remove the bottom bolt that holds the pump.

With the pump loosened, the belts can slip off the wheels.
Figure 7

With the pump loosened, the belts can slip off the wheels.

Using a 19mm open-end wrench, loosen and remove the front line from the pump.
Figure 8

Using a 19mm open-end wrench, loosen and remove the front line from the pump.

Using a 17mm open-end wrench, loosen and remove the back line from the pump.
Figure 9

Using a 17mm open-end wrench, loosen and remove the back line from the pump.

The pump is now free and can be cleaned.
Figure 10

The pump is now free and can be cleaned. Once the pump is clean, reassemble the pump and install. The reassembly is the reverse of removal. Once you have reconnected the power steering line, filled the reservoir and reattached the negative battery, you're ready to take the next step. Do not start the car. First, with the ignition unlocked, turn the steering wheel curb to curb 30 times. This will help purge the air from the system, failure to do this will cause air to be trapped in the system and result in a noisy and improperly working power steering rack. Make sure you fill the reservoir to the correct level as the system is very level sensitive.

Bookmark and Share
Comments and Suggestions:
arksamsel Comments: SLC 350 1972.
September 16, 2016
  Followup from the Pelican Staff: We don't currently have that tech article. If we get a chance to perform the procedure, we will be sure to document it.

I would grab a repair manual. It will have the procedure, special tools and torque specs.

Give our parts specialists a call at 1-888-280-7799. - Nick at Pelican Parts
 
arksam Comments: How tighten belt after all?
September 2, 2016
  Followup from the Pelican Staff: On what vehicle model and year? - Nick at Pelican Parts  
nobu Comments: are there any images for the negative battery cable removal?? are we just talking about the car battery?
August 9, 2016
  Followup from the Pelican Staff: At the battery, remove it there. - Nick at Pelican Parts  
woody Comments: Checking the power steering fliud,check when hot or cold ?
June 8, 2015
  Followup from the Pelican Staff: Either. Use the low lever marker for cold or the high for operating temp. - Nick at Pelican Parts  

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Project/Wish List]
  [Privacy Statement]  [Contact Us] [About Us] [Shipping] [Careers]

Copyright © Pelican Parts Inc. -    DMCA Registered Agent Contact Page

Page last updated: Sat 12/3/2016 02:41:36 AM