185 Stuck Engine

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popeye2347
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Re: 185 Stuck Engine

Postby popeye2347 » Sun Dec 13, 2020 4:57 pm

The head was removed today, coolant had good green color but I failed to find a head gasket. What I did discover was both #3 and #4 had a valve open - so why then did those two cylinders hold compressed air before I removed the head? Oh well, life's little mystery.. I also found that all four cylinders have surface rust and slight pitting on the front of the cylinder bore. My only conclusion is that this tractor has had a slight coolant leak in all four cylinders and has been sitting for an extended period of time with the front lower than the rear/pointed downhill. In any event, I think the pistons are rusted to the cylinder walls is why it is stuck, so I will need to unstick the rings and hone the cylinder walls. Hopefully the rings are not damaged beyond use- I really don't want to remove the oil pan/rods and pistons. #1 and #4 were the same distance down in the bore as were #2 and #3. So I don't think any rods are bent due to being hydrolocked. The saga continues.....

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Re: 185 Stuck Engine

Postby Barnyard » Sun Dec 13, 2020 5:45 pm

Hone the top of the cylinders and use the block of wood technique as I described before taking the pan and such off. A little rust above the pistons is enough to cause the engine to lock. Remove that rust before going any further.
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Re: 185 Stuck Engine

Postby SONNY » Sun Dec 13, 2020 5:59 pm

after you clean out the bores good ---- put some slickum on the piston tops----- I then heat mine til the its blazing hot ---- sometimes you get lucky. go from 1 piston hitting the wood block to the next and go back and forth with the heat too.
I take pan off and rod loose and do 1 piston at a time----lots easier that way. You will need to take pistons out anyway to either check the rings/grooves or put new rings in it. ---- save yourself grief of having to take it apart again after you find that the rings are stuck tight and you start smoking when the oil starts going past them, IF it will even start the first time.
These little motors are not forgiving when stuff is not quite right.

popeye2347
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Re: 185 Stuck Engine

Postby popeye2347 » Mon Dec 14, 2020 12:38 am

Note to self: When using a compression gauge hose to pressurize cylinders, remember to remove the valve stem contained in the end of the hose. Otherwise you will only pressurize the hose and not the cylinder.

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Re: 185 Stuck Engine

Postby Jim Becker » Mon Dec 14, 2020 1:13 am

Doh!

popeye2347
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Re: 185 Stuck Engine

Postby popeye2347 » Mon Dec 14, 2020 9:16 am

Jim Becker wrote:Doh!

My thoughts exactly.

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Re: 185 Stuck Engine

Postby popeye2347 » Fri Jan 01, 2021 11:14 pm

The plot thickens on this New Years day. The pistons finally moved after much hammering on a block of wood on their top. I concentrated on cylinders 2 and 3 which were the highest in the bore and on the same throw of the crankshaft. Then when they moved about an inch or so, I started on cylinders 1 and 4 to reverse the movement. Yes, there was some surface 'junk' on the walls, but no apparent pitting or damage that a brush hone will not remove. But even with the pistons moving this inch or so, they still are not close to being free to move. Next the hyd pump will come off and hopefully the engine will turn freely. If not then the distributor will come off. More to follow as it is revealed to me.

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Re: 185 Stuck Engine

Postby Barnyard » Fri Jan 01, 2021 11:20 pm

Are all the valves loose? One stuck valve will keep the engine from making a complete revolution.
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popeye2347
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Re: 185 Stuck Engine

Postby popeye2347 » Wed Jan 06, 2021 10:59 pm

Barnyard wrote:Are all the valves loose? One stuck valve will keep the engine from making a complete revolution.

All the valves have been moved up and down after removing the side panel. Removal of the hydraulic pump will be next on the list in my effort to free up the engine, and if that doesn't help then the distributer will follow then the governor assembly.
If none of these help then the oil pan is coming off and the bearings will be loosened, one at a time..... I really don't think it will get to that however. Until the weather warms up I am not very motivated to work on it. I would rather be in Florida. :)

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Re: 185 Stuck Engine

Postby outdoors4evr » Thu Jan 07, 2021 7:19 am

Make sure the starter is disengaged.
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Re: 185 Stuck Engine

Postby Eugene » Thu Jan 07, 2021 8:29 am

Heads off, valves free, pistons move 1 inch. Most likely pistons are not fully free.

More solvent on top of each piston, tractor in 3rd gear, rock the tractor using a rear tire. Wait, more solvent, rock tractor, repeat, repeat, repeat.
I have an excuse. CRS.

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Re: 185 Stuck Engine

Postby Barnyard » Thu Jan 07, 2021 8:54 am

Agree with Eugene. Also, keep honing. Also, I'm not sure what type of hone you have but you do wand to use one that will removed glazing and not just carbon. I use one like the hone pictured.

Image
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Re: 185 Stuck Engine

Postby Steve Butram » Thu Jan 07, 2021 7:52 pm

remove the starter and insert a long pry bar. Then try to rotate the engine. It isn't likely that the hydro pump is froze
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Re: 185 Stuck Engine

Postby Eugene » Fri Jan 08, 2021 12:11 am

Steve Butram wrote:remove the starter and insert a long pry bar. Then try to rotate the engine. It isn't likely that the hydro pump is froze
185 most likely has a starter/generator unless it's been converted to a standard type starter.

Most likely the distributor is not frozen.
I have an excuse. CRS.

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Re: 185 Stuck Engine

Postby SONNY » Sat Jan 09, 2021 11:23 am

Dont use prybars on the flywheel teeth!!!!!!!!!!!! and dont ask why!!!


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