JD low or high ring pistons esbcj February 27, 2019 12:55AM
Is there a low ring and a high ring oh kit offered by JD for the 466 crank drive oil pump engine?
Reply Quote

Re: JD low or high ring pistons esbcj February 27, 2019 01:38AM
Yea if you are searching for the 55 series 466 low ring piston. Piston is re57731 and the application was for a 4955/4960.
Reply Quote

Re: JD low or high ring pistons esbcj March 05, 2019 02:52AM
Isn’t the low ring supposedly better?
Reply Quote

Re: JD low or high ring pistons esbcj March 05, 2019 11:49AM
Yes because it handles heat better and you have room to cut valve reliefs,where on the high ring there is very little room between top ring and top of piston
Reply Quote

Re: JD low or high ring pistons esbcj March 05, 2019 03:48PM
Was hoping to find a low ring that fits in the 40 series block. Will a 7.6 sleeve for the 4955,4960 fit the 466 block?
Reply Quote

Re: JD low or high ring pistons esbcj March 06, 2019 06:53AM
Sleeves from a 7.6 will drop right in, but I don't think the piston pin diameter on o a 40 series is the same as a 7.6
Reply Quote

Re: JD low or high ring pistons esbcj March 06, 2019 06:57AM
Use 55 or 60 series rods, pistons, and sleeves. will all work in 466 block.
Reply Quote

Re: JD low or high ring pistons esbcj March 06, 2019 02:02PM
Near as I can tell from the JD website the wrist pin, snap ring and bushing are the same. And the 40 series rod is listed for the later also.
Reply Quote

Re: JD low or high ring pistons esbcj March 19, 2019 05:09AM
Talked to a former JD shop foreman and he seems to remember the rings were moved up to make them start better.
Reply Quote

Re: JD low or high ring pistons esbcj March 19, 2019 01:46AM
The 55 series rod has to be used to fit the 55 series piston due to the way the piston is built. But I have a 4440 engine tore down that has unknown brand aftermarket kit. But it still has 40 series rods with low ring Mauhle pistons. What’s the deal with that? What engine or kit did they copy? And who did it?
Reply Quote

Re: JD low or high ring pistons esbcj March 19, 2019 02:04AM
4440 pistons are low ring, there is like 1/2” to 3/4” from top of piston down to top of first ring; on 55 series high ring it is about 1/4”
Reply Quote

Re: JD low or high ring pistons esbcj March 19, 2019 12:33PM
4010 Puller. Are you sure you didn't post that backwards? Every one tells me the 40 series is high and the 55 is low.
Thanks
Reply Quote

Re: JD low or high ring pistons esbcj March 20, 2019 07:19AM
4010 puller is correct. If it helps, I had a 7.6 out of a 9965, it came stock with high ring pistons. I traded them out for a set of 40 series, they are low ring and you have room to cut valve reliefs. just as stated above.
Reply Quote

Newer Topic Older Topic

Author:

Your Email:


Subject:
Spam prevention:
Please, enter the code that you see below in the input field. This is for blocking bots that try to post this form automatically. If the code is hard to read, then just try to guess it right. If you enter the wrong code, a new image is created and you get another chance to enter it right.
Message:
Website Statistics
Global: Topics: 38,721, Posts: 229,845, Members: 3,330.
This forum: Topics: 37,083, Posts: 225,972.

Our newest member LT Limited Pro