Rebuilt B6100 sound check please

[roybeauchamp]

Hi, if you would have a moment please check out the video in the link below and tell me if you hear anything concerning.
I’ve been working through rebuilding the D650 on this pasture find. Today I cranked up the engine for the first time and it came to life! It’s idling pretty well, but I still see some smoke coming out and also a subtle “knocking” noise that I’m curious if you can pick up on video.
I hesitate to say “knocking” because it may just be the noise of the engine with no intake or exhaust manifolds.

Kubota D650 B6100 first start p2

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I don’t know enough about diesels to know what’s normal. This re-built engine has run for less than a minute so far.

Will the smoke clear up after running it for a while? Does it sound normal?

Some details:
Original block was cracked.
Donor block had cam shaft and timing gears/cover. Nothing else. All other parts came from original block.

New oem piston rings.
new oem head gasket.
new rod bearings
Serviced injectors
Serviced fuel pump- totally mucked up.
Used same fuel pump shims from donor block.
lapped valves
Valve lashed to .007”
New gaskets
New headaches
New lessons learned.

Generally everything was cleaned and put back where it was.
Never done this before. Happy to hear it come to life but want it to be right.
Thanks!

 

[North Idaho Wolfman]

Very hard to tell, but it doesn't sound quite right to me.
You also shouldn't have to keep pushing the throttle to keep it running, it should just idle, or run a set RPM.

The smoke is of little concern to me.

 

[Bee-Positive]

Timing???

 

[roybeauchamp]

Very hard to tell, but it doesn't sound quite right to me.
You also shouldn't have to keep pushing the throttle to keep it running, it should just idle, or run a set RPM.

The smoke is of little concern to me.

thanks, ok missing a copper crush washer under one of the injectors. Picking up a new set tomorrow. Could this be the cause?

 

[Russell King]

Yes, possibly. Compression on that cylinder would probably be zero or low at least.

Sounds mostly okay to me but it should definitely be able to run at idle or some set speed (as stated above).

Since it has been apart there may be something set wrong in the accelerator linkage that is not holding the injection pump rack open enough to idle. I suggest that you look at the foot pedal linkage, hand throttle linkage and the shut down lever to be sure that they are able to allow the tractor to run and that the springs are not pulling it into shut down position. I think the easiest way to set this is with the hand throttle pulled back some so it is running above idle speed to be sure it will stay running at that speed. But don’t go to crazy on the engine RPMS.

Does the tractor have a fuel shutdown lever you use to shutdown the engine or how is it supposed to be shutdown?

The foot throttle should always return to idle or whatever engine speed the hand throttle is set at.

The hand throttle should be able to adjust the engine speed and hold it at any speed between idle and full RPM capability. Pulling towards the rear is faster and pushing all the way forward is idle on my L185 so assuming yours is the same.

On my tractor there is a lever on the right side below the dash that is used to push the rack closed and remove fuel supply the engine thus shutting it down. The hand throttle and foot throttle both have to be in their minimum speed position to allow this lever to shut the engine down.

 

[roybeauchamp]

Yes, possibly. Compression on that cylinder would probably be zero or low at least.

Sounds mostly okay to me but it should definitely be able to run at idle or some set speed (as st above).

Since it has been apart there may be something set wrong in the accelerator linkage that is not holding the injection pump rack open enough to idle. I suggest that you look at the foot pedal linkage, hand throttle linkage and the shut down lever to be sure that they are able to allow the tractor to run and that the springs are not pulling it into shut down position. I think the easiest way to set this is with the hand throttle pulled back some so it is running above idle speed to be sure it will stay running at that speed. But don’t go to crazy on the engine RPMS.

Does the tractor have a fuel shutdown lever you use to shutdown the engine or how is it supposed to be shutdown?

The foot throttle should always return to idle or whatever engine speed the hand throttle is set at.

The hand throttle should be able to adjust the engine speed and hold it at any speed between idle and full RPM capability. Pulling towards the rear is faster and pushing all the way forward is idle on my L185 so assuming yours is the same.

On my tractor there is a lever on the right side below the dash that is used to push the rack closed and remove fuel supply the engine thus shutting it down. The hand throttle and foot throttle both have to be in their minimum speed position to allow this lever to shut the engine down.

Thanks Russel - yes there is a lever that you can grab with your pointer finger and raise to shutoff the engine. In the video I was working the foot pedal more than was needed. I'm going to repace the crush washers for all the injectors, check the throttle linkages you mentioned, double check that both the throttle springs on the fuel ppump look good, and check the timing on the fuel pump. Then I'll crank it back up and see how it sounds.

 

[Caden]

Pulling towards the rear is faster and pushing all the way forward is idle on my L185 so assuming yours is the same.

I agree with what @Russell King said.
FWIW, my B7100 is opposite, back is idle, all the way back is shutdown.

I would not worry too much with the smoke as of yet.