Which Bosch model VA pump do you have, AR, BR or CR? I have worked on those pumps for years, and none have ever used square section O rings at the throttle or shutoff shafts, but the old ones may LOOK like that when taken apart. There are some square section O rings on some pumps at the advance and head area. Very few parts are available, but gasket kits are so far. DGK 124 or DGK 125, depending on the pump model. CR with the line fittings straight is the later one, AR and BR with angled fittings are the early models used.
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Today's Featured Article - Pitfalls of Tractor Engine Rebuilds - by Chris Pratt. The first pop after you have put the machine together with your own hands is exciting and pleasing. The whole experience can be marred if one moves too fast and makes too many assumptions that they can just use "as is" some parts they should be closely scrutinizing and possibly attended to. In such cases, rework makes what could have been a fun project turn into an irritant or even a nightmare. Minor Irritants To give you an example of an minor but irritating proble
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