engine seized or hydraulic lock?

[Peter Will]

Hi,
engine seized or hydraulic lock?
I changed oil on my l2650 gst and ran for 10 minutes to check for leaks then shut it off.A few days later I tryed to start it and nothing.Starter was engaging with a solid click and buzz it was trying.tryed to turn motor over by turning crankshaft shaft and its stuck can't move it at all.The motor has 2050hrs on it and ran very good.Is there a way to tell if it could be something else outher than a siezed motor?Could the filter have been bad or pump lost it prime somehow.Filter was from Kubota.Any advice before I start to remove motor.I cannot believe this has happened just before the snow comes.

 

[Avondale]

I would start with the easy stuff first, pull plug and try to spin over motor. IF it was hydro-locked, it should spit out when engine cranks so have rag handy.

 

[Tx Jim]

I suppose battery has 13+ volts??

 

[BigBoyToys]

As Avondale stated remove the plugs and see if you can turn it by hand. When you changed the oil did you check the oil level before starting it?

 

[Avondale]

IF your tractor is a diesel, if so disregard my comment about plugs , crack open injectors and try to roll over engine to see if liquid escapes when pistons rise to TDC.

 

[ovrszd]

I'm a K.I.S.S. principle guy. I'd check electrical system before disassembling anything mechanical on the engine. Being a GST tractor can't you also put transmission in high gear and rock tractor back/forth to see if it's truly locked up?? I'm thinking it's a starting system problem. Engines don't lock up without some extreme noise/action prior to lockup. And I can think of no reason for it to be hydro-locked. Let us know what you find.

 

[CCWKen]

Isn't that a diesel? What "plugs" are you guys talking about?


Added: A blown head gasket can lock an engine. Check the oil and see if it's full of coolant.

 

[BigBoyToys]

Isn't that a diesel? What "plugs" are you guys talking about?

I should have been more clear and said "glow" plugs.

I can't imagine the engine being "hydro-locked" after a simple oil change. Usually happens when the tractor is tipped over on it's side. But to rule it out, removing the glow plugs should allow the engine to be turned over by hand. If it's "seized" then you won't be able to turn it by hand with the glow plugs out.

 

[Grandad4]

Anything is possible of course, but if my recent vintage tractor wouldn't crank while the starter clicked and buzzed, my first thoughts would be electrical (i.e. battery/starter,etc.) or the clutch not releasing, not a seized engine, particularly if the engine had previously been OK. You have a not-too-old tractor whose engine is built to run many thousands of hours. Unless it was run without oil or fished out of Quabbin Reservoir recently, that's very unlikely.

Welcome to TBN! By the way, you're not far from my dad's ancestral home in Hubbardston.

 

[RalphVa]

Start by checking the battery, starter and solenoid system. Really doubt it's your engine. After checking the starting electrics and okay, remove or just loosen the glow plugs and see it it'll turn over.

Ralph