Saturday, December 10, 2011

Nightmare in drive train land

Yesterday was a bad day for progress on Kintala's drive train. Mr. Joyce of Westerbeke did find an engineering drawing for the coupler and is mailing it to us. This is good news. A visit to a local machine shop suggested that the cost of getting the coupler made may end up in the area of slightly outrageous but not murderously stratospheric. News on the bell housing was not nearly so promising. Mr. Joyce could provide us with a part number, but... Regret I do not find that casting being available any more.

So the search is on for a Westerbeke P/N 020943 bell housing lying around on a dusty shelf or in a wrecked hulk in a salvage yard somewhere. Such a find would be a wonderful thing but I get the feeling the odds are about like those of hitting the lottery and ending up sailing away in a brand new 40' catamaran.

"Get a new one fabricated," you say? We asked the machine shop about that as well. Murderously stratospheric doesn't even come close to describing the price quoted. It would easily cost more than the new v-drive unit itself, and may be more than the v-drive and tranny costs combined! And the fact is I understand the price. Rent time on a CNC machine, hire an operator expert enough to reverse engineer a part like a bell housing, and then have him spin out a nice shinny new one? That's pretty much the highest tech stuff on the planet.

So I went to bed last night in a serious funk. Maybe being at the boat with bed being the v-berth shook something free, maybe my 40 years of fixing broken stuff was rattling around in my subconscious, maybe I'm just getting tired of this whole debacle and decided enough was enough; but somewhere in the dark reaches of the night a thought logged into my mental message board waiting for me to check it in the morning.

Just what, EXACTLY, is wrong with the bell housing? So I got myself out of bed and sat down with the bell housing for a long look-see. After all, the bell housing went out still attached to the old v-drive several weeks ago, covered in grime and surrounded by mangled bits of material. Amid all the other carnage the housing was just another chewed up bit. Walter machine insisted the part was trash; Westerbeke suggested the part was trashed based on the pictures, as did some other people with admitted expertice. But how bad is this thing, really?

Well, the surface material is chewed to snot around the inner mounting bore. It looks bad. It looks really bad. But so what? The area damaged carries no operating load nor is it a seal or bearing surface. What if it didn't look bad. What if I dress it out, clean it up, check it carefully for real damage like cracks, and if I find none slap a little fresh paint on it and call it a day?

Since this project started I have been told by experts that the boat couldn't have been put together this way at the factory; (it was) that someone modified the boat in the field and that lead to the failure; (no and no again) that there was no engineering information available; (its in the mail) and that various assemblies were damaged beyond repair. Maybe. The tranny was surly trashed and the v-drive was a collection of shredded parts; each could have been overhauled but the cost would have exceeded a new unit. But the bell housing? Maybe its time to take my own opinion about this project over that of the experts?

If I can't find one at a reasonable price, this one is going to get some TJ TLC and go back in the boat.

Last night the drive train nightmare raged unchecked. This morning the solution, and the end, may well be in sight. Next week we will see; but I'm starting to get the feeling that the boat is almost back under control, that the Retirement Project is close to being back on the track.

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