How to fix power steering rack and pinion piston problem

PS-DT107K 2006-2013 Mercedes Sprinter
• Reusable - No need to buy another piston on each rebuild.
• Easy to install and remove - No need for special technical skills.
• No Special Tools Required - Only need Circlip Pliers and an O-Ring pick.
• No need for expensive equipment - Reduces risk and improves cash flow.
If you need the part
Follow the link:
www.powersteeringkits.net
www.bestpartsonline.com

[@ivansaban9472]

A bit late to the game but it will help others. The original piston is not welded, it is hydraulically crimped on the shaft. You can use a Dremel or even better and angle grinder with a cutting wheel to make acouple of cuts on opposite sides from each other, parallel with the shaft. Do not cut all the way through since any slashes, pits or scratches to the shaft will render it useless since seals won't be able to seal. Just cut as close to the shaft without touching it. Then use a flat chisel and a heavy hammer to strike a blow through the slot to crack the piston all the way through. Do not hammer repeatedly and hit the shaft, just a single strong blow at the time is much safer. Do this on both slots you cut so you can crack the piston in half instead of trying to slide it off with a single crack - that will damage the surface of the shaft and seal won't seal properly. Once you remove the piston, tape over the shaft with to protect it;s finish before removing a wire clip! Again, protect the surface of the shaft! Replace seal and plastic "wheel". On eBay you can find a seller that sells Koter branded reseal kit with a Koelmeyer piston (currently $120) which you the install with a set screw instead of OEM hydraulically pressed piston. Seller even provides a link for a youTube video by Koter on proper installation of Koelemeyer piston. Just protect the shaft with tape when you are sliding those wire C clips into the grooves of the shaft on each side of the piston! From there just rebuld/reseal the power steering rack as you normally would. Good luck!

[@wolfullrich3062]

Does this require a lathe to remove the piston?

[@SpaceSparkScience]

No

[@wolfullrich3062]

@@SpaceSparkScience how does one remove the piston on the shaft? It seems welded on.

[@ivansaban9472]

@@wolfullrich3062 a bit late to the game but it will help others. The piston is not welded, it is hydraulically crimped on the shaft. You can use a Dremel or even better and angle grinder with a cutting wheel to make acouple of cuts on opposite sides from each other, parallel with the shaft. Do not cut all the way through since any slashes, pits or scratches to the shaft will render it useless since seals won't be able to seal. Just cut as close to the shaft without touching it. Then use a flat chisel and a heavy hammer to strike a blow through the slot to crack the piston all the way through. Do not hammer repeatedly and hit the shaft, just a single strong blow at the time is much safer. Do this on both slots you cut so you can crack the piston in half instead of trying to slide it off with a single crack - that will damage the surface of the shaft and seal won't seal properly. Once you remove the piston, tape over the shaft with to protect it;s finish before removing a wire clip! Again, protect the surface of the shaft! Replace seal and plastic "wheel". On eBay you can find a seller that sells Koter branded reseal kit with a Koelmeyer piston (currently $120) which you the install with a set screw instead of OEM hydraulically pressed piston. Seller even provides a link for a youTube video by Koter on proper installation of Koelemeyer piston. Just protect the shaft with tape when you are sliding those wire C clips into the grooves of the shaft on each side of the piston! From there just rebuld/reseal the power steering rack as you normally would. Good luck!