chuckholes Posted January 2 Share Posted January 2 (edited) I have a f700 with a E6 315 2 valve engine. The fuel rack seems to be stuck wide open. The fuel cut off does not work its a bosh pump 9-400-231-051. Also part number 6p036 among others. The fuel rack does not have an access plate. There is a cover on the rear and top of the governor but neither gives much access to the internals. Any ideas how to free this thing up? suggestions on shops that could rebuild it? thank you Edited January 2 by chuckholes Pic Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/ Share on other sites More sharing options...
mrsmackpaul Posted January 2 Share Posted January 2 From what I understand (not much at all) diesels start on full noise and governor pulls them back to control the revs So with this in mind I think the governor might be the issue and not the rack Paul Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588207 Share on other sites More sharing options...
fjh Posted January 2 Share Posted January 2 10 hours ago, chuckholes said: I have a f700 with a E6 315 2 valve engine. The fuel rack seems to be stuck wide open. The fuel cut off does not work its a bosh pump 9-400-231-051. Also part number 6p036 among others. The fuel rack does not have an access plate. There is a cover on the rear and top of the governor but neither gives much access to the internals. Any ideas how to free this thing up? suggestions on shops that could rebuild it? thank you Should be a cap engine side front you may be able to grt at the rack end from there! Be gentle! Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588223 Share on other sites More sharing options...
chuckholes Posted Monday at 02:06 AM Author Share Posted Monday at 02:06 AM I was able to get it unstuck. Runs pretty good Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588452 Share on other sites More sharing options...
Joey Mack Posted Monday at 11:54 AM Share Posted Monday at 11:54 AM What was the fix? 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588476 Share on other sites More sharing options...
fjh Posted Monday at 02:28 PM Share Posted Monday at 02:28 PM 2 hours ago, Joey Mack said: What was the fix? agree! help others that's the idea here! 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588491 Share on other sites More sharing options...
chuckholes Posted 20 hours ago Author Share Posted 20 hours ago On 1/5/2026 at 9:28 AM, fjh said: agree! help others that's the idea here! There was a plug on the side of the pump that was removed with a 12 mm socket. Sprayed pb blaster up into the rack. The back of the pump has an access cover I took off and was able and sprayed pb plaster in and work a rod back and forth. the main fix seemed to be taking another cover off the front of the pump. There was a rod in there I sprayed with pb and then took a screw driver and pushed the rod back. It made a clicking sound. The fuel shut off starting moving fully. ‘Started it up and it began to idle well and the shutoff worked. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588736 Share on other sites More sharing options...
Joey Mack Posted 14 hours ago Share Posted 14 hours ago Nice.... looks like you saved yourself some headaches.. Quote Link to comment https://www.bigmacktrucks.com/topic/76278-injection-pump-stuck-full-throttle/#findComment-588737 Share on other sites More sharing options...
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