For those among us who own an old auto or better yet , a Willys Jeep, one of the roles that comes up more often than we would like is to reconstruct a brake wheel cylinder. Although the task isn't a tough one, many are hesitant to tackle it. That's why we've broken the process down step-by-step.
1.) Clean the old cylinder completely and ensure you use a good parts cleaner, for example 100% mineral spirits. If the exterior is badly rusted, then first you must blast off the rust. Utilize a good respirator and eye protection. Air-blow out any residue, particularly the little fluid access hole. After that, re-clean it with mineral spirits and let it air dry for approximately 90 minutes then completely clean it again with a good quality spray brake cleaner.
2.) Now, go ahead and hone the cylinder with a drill-driven brake hone. Be sure to utilise a good sharpened set of stones and if you don't have that, replacement stones are available from most local parts stores. Be careful to utilise the one properly because improper use will quickly mess up your cylinder. Clamp the cylinder safely in a vise and run the drill at a medium speed keeping at least 80% if the hone within the cylinder. Continuously move the hone out and in at a medium speed. Keep the hone truly wet with WD-40. It's best to have an assistant spraying WD-40 as you're employed the drill. Yes, it is a sloppy job.
If your cylinder is a two-step type, don't override the step area. Hone one end at a time. Stop occasionally to spray out the residue and check the cylinder bore. If it is completely clean and there aren't any signs of dark spots then stop. If you have to hone for intensive periods and the spots still don't clean up, you'll need to purchase another cylinder and the rubber brake cylinder cups will not seal properly.
3.) Repeat the cleaning process with a product like mineral spirits and brake cleaner. And or mask off the interior and the access hole, then paint the cylinder with the primer and paint of your choice.
4.) Coat the interior liberally with the same DOT type brake liquid you plan to use. Additionally , wet the cups with brake liquid. Install the rubber cups and spring as shown in your brake cylinder kit. Keep everything clean. Be sure to point the rubber cups inward with the flat surfaces on the outside. Install the metal cups.
5.) Your cylinder is now reconstructed. Note: Always flush out your whole brake system and install all new liquid when doing any brake work.
1.) Clean the old cylinder completely and ensure you use a good parts cleaner, for example 100% mineral spirits. If the exterior is badly rusted, then first you must blast off the rust. Utilize a good respirator and eye protection. Air-blow out any residue, particularly the little fluid access hole. After that, re-clean it with mineral spirits and let it air dry for approximately 90 minutes then completely clean it again with a good quality spray brake cleaner.
2.) Now, go ahead and hone the cylinder with a drill-driven brake hone. Be sure to utilise a good sharpened set of stones and if you don't have that, replacement stones are available from most local parts stores. Be careful to utilise the one properly because improper use will quickly mess up your cylinder. Clamp the cylinder safely in a vise and run the drill at a medium speed keeping at least 80% if the hone within the cylinder. Continuously move the hone out and in at a medium speed. Keep the hone truly wet with WD-40. It's best to have an assistant spraying WD-40 as you're employed the drill. Yes, it is a sloppy job.
If your cylinder is a two-step type, don't override the step area. Hone one end at a time. Stop occasionally to spray out the residue and check the cylinder bore. If it is completely clean and there aren't any signs of dark spots then stop. If you have to hone for intensive periods and the spots still don't clean up, you'll need to purchase another cylinder and the rubber brake cylinder cups will not seal properly.
3.) Repeat the cleaning process with a product like mineral spirits and brake cleaner. And or mask off the interior and the access hole, then paint the cylinder with the primer and paint of your choice.
4.) Coat the interior liberally with the same DOT type brake liquid you plan to use. Additionally , wet the cups with brake liquid. Install the rubber cups and spring as shown in your brake cylinder kit. Keep everything clean. Be sure to point the rubber cups inward with the flat surfaces on the outside. Install the metal cups.
5.) Your cylinder is now reconstructed. Note: Always flush out your whole brake system and install all new liquid when doing any brake work.
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Walck's 4 Wheel Drive is dedicated to the restoration and preservation Willys Jeeps. We are the nation's leader in restoration and reproduced parts. Willys Jeep Restoration BlogWalck's 4 Wheel Drive Parts and Accessories