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How to Bench Bleed a Master Cylinder on a 2000 Plymouth Voyager

The Plymouth Voyager, manufactured from 1984 to 2000, was one of the first minivans made by the Daimler-Chrysler corporation. To replace the brake master cylinder in a Plymouth Voyager, you must first bench bleed the new one before installing it to ensure that there isn't any air in the system. You can bench bleed the master cylinder in about 10 minutes; these directions apply to a Voyager from any year.

Tools Used: Replacement master cylinder (varies by model year and engine type), Bench bleed kit (may come with the cylinder), Bench vise or clamp-on vise, Bottle of DOT 3 brake fluid, Phillips head screwdriver

Bench Bleed a Master Cylinder

Remove your old master cylinder before you bench bleed and install the new one. The brake master cylinder of a Plymouth Voyager is generally located up against the driver's side firewall, next to the strut tower; this differs slightly between models, so just look for the brake fluid reservoir to find the master cylinder.

Set your new Plymouth Voyager master cylinder in a bench vise; if you don't have a bench vise, you can use a clamp-on vise and an old table. Clamp the cylinder firmly into place, making sure that it's level. Open up the bench bleed kit and have it close by.

Put the old reservoir into the new master cylinder, if you're reusing the old one or you've bought a new one. Dry off the reservoir completely, since brake fluid absorbs water and can damage your brake system and install it into the top of the new master cylinder. If a reservoir came with your new Plymouth Voyager master cylinder, you can skip this step.

Find the two fittings that came with your bleeder kit. Thread them onto the outlets located on the sides of the cylinder. Take the two lengths of hose that came with your kit and insert them into the fittings. Bend the hoses up, so they're aimed into the fluid reservoir.

Cut the hoses if necessary. They should stick point-down into the reservoir and extend about halfway into it. Use a clip to secure the tubes to the side of the reservoir and keep them in place. You don't want them to come loose and allow air into the system or spray brake fluid around.

Fill the Plymouth Voyager's reservoir with fresh brake fluid. Pour enough of it into the reservoir to fill it just shy of the maximum fill line. The plastic hoses will extend down into the fluid, creating a closed hydraulic system.

Use a Phillips screwdriver to pump the piston on the brake master cylinder to move the fluid through the unit and into the hoses. Put the screwdriver into the cylinder and push it firmly against the piston to start pumping.

Watch for air bubbles coming out of the hoses and into the fluid in the reservoir. Keep pumping until all the air is out of the cylinder and you don't see any more bubbles. Consider buying clear hoses, if the ones that come with your kit are black, so you can see the air bubbles better.

Leave the two hoses in the reservoir and slowly remove the cylinder from the vise. You can now install the primed master cylinder into your Plymouth Voyager.

Tips & Warnings

Brake fluid can damage the paint on your Plymouth Voyager, so try not to get any on it. If you do, clean it up right away with a towel, soap and water.

Don't let the reservoir run dry, since pumping the master cylinder without brake fluid will put air into the system and you'll have to start over. It's unlikely that the fluid will get low, if you put the proper amount of brake fluid in to begin with.

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