Will not start when engine is cold..

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kgremillion
Posts: 14
Joined: Sat Dec 13, 2014 11:40 am
Location: United States

Will not start when engine is cold..

Post by kgremillion » Fri Jun 05, 2015 3:46 pm

I recently overhauled my 880 diesel tractor. Tractor will not start unless I use ether. I installed new crankshaft, new pistons with rings.The head has been reworked. Fuel is getting to the injectors. Any suggestions on what I might check? Thanks, Ken :)

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RE: Will not start when engine is cold..

Post by Guest » Fri Jun 05, 2015 4:20 pm

Using ether is the very worst thing to use to start a newly rebuilt engine! If the engine has not started (properly) since the rebuild tow start it with another tractor and leave it running a while but not just ticking over, it should then start normally. Give it some work to bed everything in. If it still won't start then other things such as timing may need investigating.

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erkki
Posts: 2032
Joined: Sun Apr 09, 2006 12:02 pm
Location: North Finland

RE: Will not start when engine is cold..

Post by erkki » Sat Jun 06, 2015 6:52 am

Agree PR. Recently overhauled engine may need a few hours of good work to make the rings fit tightly to the cylinders. When cranking, do you get thick grey blows of unburnt fuel from the exhaust pipe? A worn cross blade pump on the back end of the injection pump may cause the problem because when cranking the revs are low, which may be insufficient to produce good pressure inside the pump housing. If the internal pressure is too low, the pump gives only small portions of fuel, which causes poor starting.

W.B.R erkki

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odin
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Location: Huddersfield, West Yorkshire.

RE: Will not start when engine is cold..

Post by odin » Sat Jun 06, 2015 7:25 pm

I reckon that the timing is out. It can be difficult to install the Fuel Injection Pump drive train correctly on the 3 cylinder engine which you must have to strip down and then rebuild if the crank has been out. I recommend removing the FIP and really study the timing diagram re-fitting procedure.

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erkki
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Joined: Sun Apr 09, 2006 12:02 pm
Location: North Finland

RE: Will not start when engine is cold..

Post by erkki » Sun Jun 07, 2015 9:42 am

Hmmm. If the injection pump is timed wrong to the camshaft, the timing is so bad that the engine does not run on a normal manner even when warm. A mate of mine had the problem after overhaul and they could not make the engine run at all.

W.B.R erkki

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