57Mack Posted January 1, 2016 Share Posted January 1, 2016 Is there any literature out there for timing an American Bosch pump with a Woodward govenor? need to remove for service. Quote Link to comment https://www.bigmacktrucks.com/topic/43348-673-injection-pump-wwoodward-govenor/ Share on other sites More sharing options...
theakerstwo Posted January 2, 2016 Share Posted January 2, 2016 I have no manuals but do remember doing it back in the 60s.On front of the governor there is a plug you can take out.It has a servo piston in there that oil pushes the rack to a fuel postion which is toward the rear of the pump.When you check the timing the rack needs to be in full fuel postion.To get full rack remove the plug and put a short nut or socket in there next to the rack and then screw the plug back in finger tight.The ideal is to get fulle rack how ever you want to do it.The remeove # one injector line from the pump and remover the nut that holds the adapter in the pump and under it will be a deliver valve and spring.Remove the valve and spring keeping it clean.With the fuel shut down pushed in start to pump fuel with the hand primer and watch fuel come out of the # one fuel line adapter on the injection pump.Get some one to hand turn the engine in engine rotation until the fuel just stops and no more than that.if you have to back the engine up some do so about 1/4 turn then start forward till it shuts the fuel off.At that point # one is ready to start injection.The timing marks will be on the bottom of the flywheel housing.There is a small pointer pointing up to the flywheel.I should be reading degrees to about 28 degrees.26 or 27 would be ok.Remove the fuel pump.When you install it and done with timing it make sure you remover the nut or what ever you have against the survo piston before you start it or other wise you will have a run away.To adjust the timing you have to remover the small cover on the front engine cover to find the slotted gear.You need the engine timing pointer sitting at 27 degrees and instll the pump.then check the flow timing When the pump is off the engine do not turn the engine over. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/43348-673-injection-pump-wwoodward-govenor/#findComment-318234 Share on other sites More sharing options...
57Mack Posted January 2, 2016 Author Share Posted January 2, 2016 Ok thank you. The only issue I have, is that my front cover doesn't have the small inspection plate that most engines have. That's where I'm lost. Quote Link to comment https://www.bigmacktrucks.com/topic/43348-673-injection-pump-wwoodward-govenor/#findComment-318248 Share on other sites More sharing options...
theakerstwo Posted January 2, 2016 Share Posted January 2, 2016 I cant help any more cause I cant remember ever seeing a cover like that and sure don't know how your going to time it. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/43348-673-injection-pump-wwoodward-govenor/#findComment-318260 Share on other sites More sharing options...
j hancock Posted January 2, 2016 Share Posted January 2, 2016 May help.http://www.bigmacktrucks.com/index.php?/topic/29874-woodward-governors-on-b-model-macks/?hl=woodwardhttp://www.bigmacktrucks.com/index.php?/topic/29462-673-mack-injector-pump-timing/?hl=woodward#entry157927 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/43348-673-injection-pump-wwoodward-govenor/#findComment-318265 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.