Kubota m8580 4 cylinder. Engine disturbed pending repair of injector pump

Mike66

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Dec 7, 2016
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Castor,alberta,canada
My m8580 injector pump was removed for repair. Failed to mark gears. Then engine was turned over. Lost as how to set it up and time it again. Also cannot bleed pump. Pump is a cav.
 

1970cs

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Do you have the engine service manual? NIW may have the WSM on the engine what is the model of the engine.

Basic timing is to roll the engine over to top dead center. This where the information in the WSM for the engine comes into play. So many degrees before top dead center to set up for commencement of injection. According to the CAV Lucas manual the key should be inline with cylinder number one port. Remove the timing window cover on the side.

There is line that is stationary and one that rotates. You align those marks, but the caveat here when you slide the timing gear on to the whilst getting the key and helical gear to time without moving the line in the pump window!

http://ww2.justanswer.com/uploads/ClaytonH729/2010-11-04_073651_4btFuelPumpTimingMARKS.pdf

Pat
 

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Mike66

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Dec 7, 2016
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Castor,alberta,canada
Do you have the engine service manual? NIW may have the WSM on the engine what is the model of the engine.

Basic timing is to roll the engine over to top dead center. This where the information in the WSM for the engine comes into play. So many degrees before top dead center to set up for commencement of injection. According to the CAV Lucas manual the key should be inline with cylinder number one port. Remove the timing window cover on the side.

There is line that is stationary and one that rotates. You align those marks, but the caveat here when you slide the timing gear on to the whilst getting the key and helical gear to time without moving the line in the pump window!

http://ww2.justanswer.com/uploads/ClaytonH729/2010-11-04_073651_4btFuelPumpTimingMARKS.pdf

Pat
thanks so much for the reply! i do not have any manuals or specs on tractor or engine type. i am green to diesels and how to set up timeing of pumps how do i find top dead centre of engine? also my access window in pump shows different letters and when i do go to line up marks all there is on opisite side is what looks like a big c clip
 

North Idaho Wolfman

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I'm sorry I don't have a copy of that manual.
The motor is a V4702-A

Some manuals you can find online, but all of the ones I found for this model are scams or poorly copied manuals.

You can go here and get the manual (very good price)!
The WSM will spell out exactly how to set the timing step by step. ;)

http://www.ebay.com/itm/like/321759637756?lpid=82&chn=ps&ul_noapp=true
 

Mike66

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thanks for all the info:) also why is it so hard to bleed pump. we had engine run previous to this problem. but when we shut it off and try next day it wouldnt start. and was still unable to prime it. manual pump seems to pump fuel fine to the injection pump but thats it no start and hard to prime
 
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1970cs

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My suggestion with knowledge that you have about diesels and not knowing what TDC is, to call in your local dealer and let them do it for you.

Pat
 

Tx Jim

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thanks for all the info:) also why is it so hard to bleed pump. we had engine run previous to this problem. but when we shut it off and try next day it wouldnt start. and was still unable to prime it. manual pump seems to pump fuel fine to the injection pump but thats it no start and hard to prime
Sounds as if you needed to purge air out of fuel system. FYI glow plugs are key 050 for your tractor model
 

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CountryBumkin

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My suggestion with knowledge that you have about diesels and not knowing what TDC is, to call in your local dealer and let them do it for you.

Pat
Also, know that on a four-stroke engine there are two TDC positions you need to be aware of. One is TDC on the compression stroke, the other is TDC on the exhaust stroke. The pump needs to be timed to the compression stroke.
 

Mike66

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Dec 7, 2016
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Castor,alberta,canada
Do you have the engine service manual? NIW may have the WSM on the engine what is the model of the engine.

Basic timing is to roll the engine over to top dead center. This where the information in the WSM for the engine comes into play. So many degrees before top dead center to set up for commencement of injection. According to the CAV Lucas manual the key should be inline with cylinder number one port. Remove the timing window cover on the side.

There is line that is stationary and one that rotates. You align those marks, but the caveat here when you slide the timing gear on to the whilst getting the key and helical gear to time without moving the line in the pump window!

http://ww2.justanswer.com/uploads/ClaytonH729/2010-11-04_073651_4btFuelPumpTimingMARKS.pdf

Pat
only tag I found with engine number was 085144
 

1970cs

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Also, know that on a four-stroke engine there are two TDC positions you need to be aware of. One is TDC on the compression stroke, the other is TDC on the exhaust stroke. The pump needs to be timed to the compression stroke.
Well aware of that, my mistake on not mentioning that! Also #1 cylinder should have been in the details also.

Pat
 

Mike66

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Dec 7, 2016
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Castor,alberta,canada
Got pump timed and finnaly bled so i thought. Had awesome fuel squirt out of injector lines. Time was late so i stopped for lunch. Came back and again no fuel squirting out. Bleed system again. Left for five minutes came back and again no fuel to injectors. Whats going on?? Lost and dont know whats next. Also i did put new electric fuel pump. Thought this would help but it didnt.
 

D2Cat

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Mike, if you have new lift pump and repaired injection and having fuel problems, if doesn't leave much you can't isolate.

Do you have a clean fuel filter in the system? When the fuel filter was off did you have good fuel flow to the filter? Then you have lines going to pumps. Maybe a line has failed internally. Check for flow at each connection.