After 420 hrs I noticed some air in my brake lines. Since they are up stream from the pilot side master cylinders, they did not affect the performance of brake ( I have not flown from the right seat for a few months).
I unscrewed the cap from the brake fluid reservoir and took it to a hardware store. They found me a comparable pipe fitting and a five foot tube. I thread the fitting into the reservoir and run the tube to the brake fluid can to catch the over flow. I also brought a foot of 1/4" tube to fit between the small oil pump and brake caliper nipple. First I pumped until brake fluid is overflowing the 1/4" tube, then I loosing the nipple (1/4" wrench) until brake fluid dripping out from it. At this time I connect the tube to the nipple. I loose the nipple another half turn, then, begin pumping. After awhile, I could see brake fluid coming down the overflow tube on the brake reservoir. I stop and refill the oil pump with brake fluid and try the other brake caliper. The bleeding procedure is quite easy. But, surely it is messy.
