If you could find a kit for it it's not to tough to assemble/dissassemble one. I took the one on my '49 apart because some sort of bugs climbed in through the vent, nested and plugged things up. I have a shop manual for an International that showed one similar enough to suffice for instruction on taking it apart to clean it out. I didn't change any seals but they all looked good and it was still full of brake fluid. Time will tell if it's going to leak. On mine it appeared ther are only two places where fluid can get into the vacuum line. One is the small plunger behind the diaphragm that switches the vacuum and the other would be the seal on the shaft between the vacuum piston hyd assist plunger.
