Topic: Re: GB diesel... with roosa master
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American Bosch PSB pumps can be a challenge as they turn engine speed, not 1/2 like other pumps do. With the drive hub lined with pointer you will be on one or six. To find out which, if head gear mark is visible, it's on one. If not pump is on six. I like to watch cyl six valves, when rocking at TDC then you know for sure # 1 is on compression, ready to fire. The best IT book for PSB pumps is the Oliver 77,88,99 as it explains operation correctly. The head gear and hub drive mark should NEVER align together. The head is assembled with cam on base circle. Cam lift port closing is with tappet partway up camlobe, and head gear will have moved about one tooth.
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