If you are getting a lot of clunking you need to investigate why. Some is normal, but a lot means that something is wrong. It can be low fluid level or drum brakes that are out of adjustment. Most of you have disc brakes so thats probably not going to be the cause. I have drum brakes and a Tie Down model 66 actuator. It does not clunk at all when the brakes are adjusted correctly. You can feel a little nudge when you take off and stop but no clunks.
If you got water in your actuator and lines you have problems. You need to flush that out pronto and bleed the brakes before it all gets corroded and then you will have to replace everything and that gets expensive, actuators are anywhere from $110-150 and up, to replace lines is a lot of labor and replacing disc brake calipers ain't cheap either.
The best thing to do is get a big bottle of brake fluid, some brake flare fitting wrenches (they are needed to open the bleed fitting on the caliper or wheel cylinder without stripping the fitting) and a one man brake bleeder (made by Lisle). You need to find out how to manually actuate the master cylinder on your actuator, usually the manufacturer has instructions on how to do that. The idea is to fill it up with fluid, fill the cup on the one man brake bleeder about 1/2 full with brake fluid, then put the clear plastic line from the bleeder on the fitting on the caliper, open the bleeder, and then pump the actuator, you will see fluid in the line and it will have bubbles most likely. You pump it and keep filling the master so it does not run dry. Eventually it will fill the cup of the one man bleeder but it is made to allow the excess to overflow. You need to to this until you are getting only clean brake fluid out and no bubbles, it may take a while. You have to do this for both calipers/wheel cylinders. After you get clean fluid close the bleeder. Keep topping off the master cylinder. If you can't find the one man brake bleeder you can do it with a water bottle (like a clean dry Poland Spring bottle). Here is how we did it back in the 70s, get clear plastic hose that fits the bleeder. Then cut a length of so it is long enough to reach the calipers and goes down to almost the bottom of the bottle. Tape the top of the bottle to keep the hose in there. Then fill it enough with clean brake fluid to cover the bottom of the hose. This is to allow the air bubbles to escape but not to pull in air. If you do it that way it helps to have a helper to keep an eye on the fluid and tell you when the bubbles stop. The bleeding works better if you have the bottle or one man bleeder higher than the caliper because air bubbles travel up (Doh!) I've done this many times on older cars and I usually flush out the brake fluid on my trailer when I replace the wheel cylinders, which is about every 4 seasons.
If this is not clear enough go over to
http://www.championtrailers.comlook in tech articles, they are very good and will make it clear with pix, etc.
here you go......
http://www.championtrailers.com/techsup ... eed_brakes
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