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Hi everyone having problems priming the fuel system on my 785 plenty of fuel to the injection pump gravity feed but nothing coming out of the pump I get an initial spit when I start cranking but nothing after that I have rebuilt this engine out of two scrap units so I have no previous history starting to think the pump is faulty

please advise 

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it is hard to do,but look for similar posts

if RM  and setting long, plungers may be stuck...

if cav this was covered in the last month

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Is fuel tank fuel full ? Makes it easier.

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Just now, ky966boy said:

Is fuel tank fuel full ? Makes it easier.

if it has fender tanks make sure all piping in clean and cross over not plugged so draw tank is low/empty....

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Also fitting on bottom of tanks give trouble

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I have tried tank fuel and directly into a independent drum no difference ,I have the Bosch type pump with the advance and retard cylinder on the top. 

Regards craig

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Thanks guys tried everything numerous times just had to convince myself I had tried everything and all it can be is the fuel pump so I’ve pulled it off and I’ll give it a strip and check over any advise stripping the Bosch va fuel pumps

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Is this the type with banjo bolt fittings on the hoses? I have seen the neighbors tractor that didn't run because the fittings were switched and the one has a check valve to maintain pressure in the injection pump

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Yes it is and I did have them the wrong way around good call, stripped the pump today and found the pin snapped on the inside of the fuel controller spindle run start stop have made a new pin (2mm drill bit) perfect hopefully this has been the problem hoping to refit and try this weekend

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