I got the 04 38 foot two weeks ago the first time a drove it the brakes were so bad, hard to stop and had a bad feel. I took it to the truck shop my good friend has, as he did all the work on my trucks ( I owned a large company for 28 years) the hydro boost system is new to me as, all the trucks that I ran had air brakes. He told me that the hydo system is a good one and a lot school buses and on a lot of class 5-6-7 trucks use the system. So what to do to fix it. WE took the old oil out of the pump system and them took all the dot 3 oil out of the the tank in the front of the alpine them filled the tank with dot 3 and them took that out, this was done to clean the tank, this was done because the dot 3 in the front was bad, (very bad) them filled it once more. We bleed the brakes, the back first and then the front we put a small line on the bleed valve and put all the oil from the 4 brakes in cups so we could look at it. All the oil was dark brown (BAD!!!!!!!!!!!!!!) WE had to bleed down the brakes 4 times on each wheel to get the new clear oil. I will add to this that the first time in the bleeding that the oil was hard to get out and by the 4th time it was ok to go through the system. NO air was in the system that we found. Next we put rycon 46 in the pump system. I will add that we bleed down the system with the pump system off to see if the electric back up was working, it was. With all systems now changed this what I found on my 04 the stearing was very easy to turn, like new. the brakes are 200 % better, it will hold at a stop light with very little foot effort. This it what I think I will do check the dot 3 oil every year. The oil that came out of my system was so bad
I will watch the rycon 46 for any changes. Make sure the you use a good shop that can spot any trouble. I hope this helps this system is ok if it working and the oil is good and is not all that hard to fix.
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