Author	[Modern View]
JON BARTON 10-13-2012 20:13:16 68.99.225.196 Report to Moderator	i have a stuck R and would like to rebuild it. i have heard here and there that pistons from other JD models work better than the original R pistons. i need some advice on this. if i change pistons do i need to change injectors and injector pump??? will the other model parts fit the R or is there a bunch of adapting. and where is a good place to get the parts i will need?? pistons..rings...gaskets..etc?? all the machining will be free so that"s not an issue. i would like to start looking for the parts i will need so i can finish this in my lifetime. thanks for any help you can give. [Reply]   [No Email]
gtx1967jewison 10-14-2012 18:23:35 174.253.136.148 Report to Moderator	Re: PISTONS FOR AN R REBUILD in reply to JON BARTON, 10-13-2012 20:13:16   Everything I've heard you use 730 pistons & injector tips. This requires an overbore of 3/8". Yes, 375 thousandths. Oversized R pistons aren't made. This requires a special head gasket. I believe Renaissance Tractor has done some & others too. I would try to use the pumps, & whole injectors from the 730. [Reply]  [No Email]
Hendrik from Germany 10-17-2012 05:45:21 212.144.4.247 Report to Moderator	Re: PISTONS FOR AN R REBUILD in reply to gtx1967jewison, 10-14-2012 18:23:35   New Model R oversize pistons: As you can see... they ARE available. At least in Germany... Hendrik This post was edited by Hendrik from Germany at 05:45:43 10/17/12. [Reply]  [No Email]
buickanddeere 10-14-2012 07:48:59 184.151.63.200 Report to Moderator	Re: PISTONS FOR AN R REBUILD in reply to JON BARTON, 10-13-2012 20:13:16   iirc the R can be bored to stock 830 size. There was something about reaming the head's injector bores to accept the 70/720/730/80/820/830 injector bodies. The R uses the small 10mm pump so don't use the 6 hole/ 12 thou dia late 820/830/840 tips. [Reply]  [No Email]