Re-timing a D-239 engine.

Posted by Drew 16 on November 17, 2014 at 08:17:15 from (83.200.193.176):

Hello, all.

Whilst being a Ferguson owner my self, my next door neighbour (who speaks only French) has a German-built International 724 with a D-239 plant. Since the day he paid over the market value for it, he's had various troubles, none of which, I've re-assured him, are insurmountable. Consequently, with my encouragement, he's ploughed on with a progressive overhaul, whilst still actually using the tool. However, the time has come to face a certain fact that the awful rattle on uptake is not down to his gearbox main-shaft; rather that he has issues with his big-end and/or main bearings. It's not that the engine has ever lacked power or been a challenge to start, just that it has this cacophony on uptake.

So, head off, sump likewise, and timing-chest removed, and he's faced with cam gear, idler, pump gear and the smaller sprocket on the crank. Piston #1 currently sits at TDC, with the locator pin for the crank pulley at 180-deg south. This I've told him, for all my experience of IH, is important to note, as he has an engine which is/was well-timed, with #1 where it needs to be for setting-up. But, of course, that crank needs to come out, and the pistons with it, and I fancy it will be a bit of an art to throw back in in exactly the same position, dowel 180-deg south and #1 at TDC, which, if so, would change nothing regarding the smooth timing he has always had. I focus on the locator dowel as there are no other obvious timing marks on the crank gear, that I can see from the observations I've made.

So, boiled down, do the D-239 knowledgeable ones on here think that the less-than simple replacement of the crank as it currently stands is possible without shaking about cam/idler/pump gears, and will alter nothing, or does wisdom say remove the idler, fit the crank and then position everything as if it was a complete re-build (which it isn't really, as there is no actual need to remove/replace the functioning cam and pump)?

Kind of sounds like I'm asking what are all the timing alignment marks at #1 TDC, doesn't it? :D

Any photographic help would be appreciated.

Regards,

Drew

Replies:

• Re: Re-timing a D-239 engine. Drew 16 22:47:04 11/17/14 (0)
• Re: Re-timing a D-239 engine. jimb2 14:48:49 11/17/14 (0)

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