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For the next step we will be removing the snap ring that holds in the piston.
Use a pair of snap ring pliers that pinch inward or set your universal set to pinch inward. Find the eyes
of the ring and remove the ring.

Removing Snap Ring with Snap Ring Plyers

Once the ring is removed the piston will slide out. This is the point where you need to pay
attention to the direction and order that the parts are removed. This will make installation
of the new parts much easier. Lay each part out in a line as they are pulled out. You may
even want to take a picture to use for reference later in case the parts get disturbed or
moved from the position you placed them in. Placing them on a lightly colored or white
shop towel will help too.

Compare New Parts to old Parts

The picture above shows the old parts pulled from the master cylinder
along with the new parts ready for installation. Please keep in mind the picture shows the parts
laid side by side, but you will want them laid out in order as stated in the above instructions. Make
 sure to compare all the parts to verify they are the same as the ones removed. It is not uncommon
for master cylinders to have been changed to other models for replacement. So, be sure to check
the parts carefully before the next step.

Decide correct direction of piston seal New Piston Seal installed Correctly

In the picture above you will see the seal for the piston before and after installation.
The first picture shows that the seal has a taper and should be compared to the old seal before installation is made.
Installing the seal backwards will cause the master cylinder to not work, so this is an important step.
After determining the proper direction use a good amount of the silicone lube and slip the seal over
the piston and into place carefully. Do not use tools to do this step so the seal does not get damaged.
Also check the piston for burrs before slipping the seal over it so you do not damage the seal during

Decide correct end for spring seal Correctly Installed Spring Seal

Installation of the end seal of the return spring is shown in the picture above. There usually is a taper at
one end of the spring that will determine which end of the spring to put the end seal on.

Inspect Master piston Bore Clean thoroughly

Next you will want to inspect the bore of the master cylinder before installing
the piston and related parts.

Clean the inside out thoroughly. Carb cleaner and brake cleaner work best along with a hard bristled
round pipe brush. When the inside is clean check for scoring and oxidization damage. Scoring is
excessive grooving to the bore from piston movement and oxidization is the erosion of inside surface.
Both can cause the piston to not seal correctly. After this process is done and you are confident the
master is undamaged, you will be ready for installation of the piston and related parts.