Reply to thread

Message: [QUOTE="Racer X, post: 337893, member: 1934"] Been through 4 replacements on one truck, 3 each on the others we own. A better pump too would be great, but the investment it would require would take a long time just to reach the break even point. Not likely to appeal to potential investors. The existing design's most common failure points are the pump and diaphragm drives. The diaphragm drive is made of soft metal. As it wears, the metal grit contaminates the pump drive needle bearing, which eventually causes failure. A simple hardened cam lobe shaped internal pump drive and hardened diaphragm drive would fix both weak points. An added grease fitting would provide the lube needed. Some failed pumps just wore the drives down until they couldn't produce vacuum. None of the pumps we have replaced including our own actually had a bad diaphragm, except pumps that had the housing hacked/cut by an installer. Some pumps do have a bolt style that allows 2 bolts to be removed w/o pulley removal, others have none that can be removed. Haven't seen any that allow all 3 bolts to be removed that didn't have housings that weren't hacked/cut by an installer. Those all lasted less than 20,000 miles, probably from heat damage to diaphragms and bearings from the last installer's hacking/cutting of the housing. There is a better way w/o damage to save time line mechanics....:) If we make this, it will be made entirely in the USA unlike most of the "Help" brand's line of products. [CENTER][B][I]Thanks for the response to date. Keep it coming! :toast:[/I][/B][/CENTER] :popcorn: [/QUOTE]