John Deere 350 dozer

Regarding the 350 with water in the oil, I have the head off and have taken it to the machine shop and they said everything looked good. Took the belly pan off and the oil pan off. It looks like only 2 cap screws hold each piston, wondering if I can take the pistons out thru the top or is there more to it than taking out the 2 cap screws.
Thanks Jim
 
when you put it back together use new rod and main bolts or you will find a hole in the side of the block
 
Yes they come out the top.
I see no need to replace the main bolts but to be safe you might replace the rod bolts since they could have been torque turned.
 
My thoughts too,, I fear that this guy may be a bit over his head with this O/H,, but we will help him just the same..
 
While you have the pan off fill the block with water and look at the bottoms of the sleeves to see if water is leaking by the packings. Hot water might show the bad liner seal quicker.
 
Thanks for the info. I am looking for a mobile mechanic. In the John Deere service manual it says " bolt down cylinder liners before removing pistons". How do I bolt them down?
Jim







(quoted from post at 09:23:32 08/14/14) Regarding the 350 with water in the oil, I have the head off and have taken it to the machine shop and they said everything looked good. Took the belly pan off and the oil pan off. It looks like only 2 cap screws hold each piston, wondering if I can take the pistons out thru the top or is there more to it than taking out the 2 cap screws.
Thanks Jim
 
That means "If" your not going to pull the liners,, and the liners need pulled,, there will be a lip of carbon,and corruption around the top of the liner,, the piston will try to snag on it, scrap it as clean as you can "before" you start to push the piston out,and Of course use some thing firm like a stick of hard wood to bump the piston out (saves damaging the rod journal),, after the pistons are out then cut a piece of rod,pipe or the like the right length to push on the lower protrusion of the liner with a bottle jack,, the first liner will dump some water down your neck, so be ready for that..
 
(quoted from post at 08:51:29 08/15/14) That means "If" your not going to pull the liners,, and the liners need pulled,, there will be a lip of carbon,and corruption around the top of the liner,, the piston will try to snag on it, scrap it as clean as you can "before" you start to push the piston out,and Of course use some thing firm like a stick of hard wood to bump the piston out (saves damaging the rod journal),, after the pistons are out then cut a piece of rod,pipe or the like the right length to push on the lower protrusion of the liner with a bottle jack,, the first liner will dump some water down your neck, so be ready for that..

Thanks for the reply. Jim
 
And I always thought it was to keep newly installed liners from pushing up as you rotated the crank during assembly.
 
Thanks everyone for the info. Do the cylinder liners protrude about an inch or 2 below the block? That's what it looks like to me. How thick are the walls on the liners? Hopefully I can find a mechanic this next week.
Jim
 

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