Greetings One and All From The Northern Rockies!
I would appreciate any pearls of wisdom some of you more experienced members might wish to toss my way after reading the following.
Tractor: CIH 695 with D239.
Focus: Piston Ring Replacement with Service Manual (for a 685 and a D239 Engine) on hand.
Issues: None per se, just time to replace rings on a very well-maintained, use of synthetic oil for the last 2700 hours, ~ 4500 hours on engine. Regular, thorough cleaning with Liqui Moly every 200hr. oil change. Am NOT expecting anything beside “Normal Wear” in cylinder sleeves.
Questions:
Since Service Manual shows engine block removal NOT required to change the rings, all the better…but that leaves the question of cylinder sleeves’ “treatment”:
Do I deglaze with silicone carbide brush – and with WHAT GRIT???
Manual makes NO MENTION of recreating hash marks for the new rings to seat themselves properly again, so presumably just change rings and reinstall? That much I can do, no anticipated unknowns.
Since Oil Pan is removed, and IF you think deglazing SHOULD? be done, then the “grit/detritus” from brushing MUST be contained within the cylinder sleeve with some form of closure at base of sleeve…something I’ve never done before (and am trying to avoid as many unpleasant surprises as possible :-) Should I or shouldn’t I??
I do have the proper o-rings on hand for the cylinder seals and am intent on replacing these as well, but would feel a lot better, methinks, IF cylinder sleeves were pulled out – but with what puller? An OTC 1200 with 1225 Pad sounds great but can only work with entire engine block out, is my guess – and the cost of purchase is prohibitive for a one-off. Of course, there’s the cheapie Vevor puller but it would still require the block’s removal???? Can the O-Rings be replaced WITHOUT pulling the block????
Our ranch is very remote, nothing even remotely populous enough to permit possibility of a “rental” puller :-) Not to mention no local wizard-mechanics to offer sane advice :-) It’s great adventure having more Grizzly and Cougar for neighbors than people – but there are definite drawbacks, too, sigh.
Hopefully, one of you has a bit of advice?
Cheers!