velvet drive external filter add on
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=38193
Printed Date: November-16-2024 at 8:48pm
Topic: velvet drive external filter add on
Posted By: Warpman89
Subject: velvet drive external filter add on
Date Posted: March-02-2016 at 12:11pm
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Has anyone tried adding an external, replaceable filter to their transmission? would it be worth it for extending the life of the transmission? It can't hurt, right? I would think the added fluid in the filter would be beneficial too. I have not looked into it too thoroughly but it seems like a filter could be added in-line on one of the oil cooler lines. Any thoughts? ------------- Stu 1982 BareFoot Nautique PCM 454 *Under Repair* http://www.correctcraftfan.com/diaries/details.asp?ID=8077&sort=&pagenum=2" rel="nofollow - '82 BFN |
Replies:
Posted By: 8122pbrainard
Date Posted: March-02-2016 at 12:35pm
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Stu, Think about the automatic in your car. They typically have a screen and no filter just like the Velvets. I don't feel a filter would extend the life as there are Velvets out there with LOTS of hours on them. Then there's the restrictive pressure drop across a filter. Think about that. It's my opinion that you do not want to install a filter. Pull the screen on the ATF return line and check it out. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Warpman89
Date Posted: March-02-2016 at 1:15pm
Good point! I had thought about the added restriction but its hard to say how much there would be. I rebuilt my transmission last year and cleaned that screen at the same time, which is what got me thinking about this. The guy that rebuilt my transmission a couple years ago said I could run tractor hydraulic fluid in these transmission, is that true? ------------- Stu 1982 BareFoot Nautique PCM 454 *Under Repair* http://www.correctcraftfan.com/diaries/details.asp?ID=8077&sort=&pagenum=2" rel="nofollow - '82 BFN |
8122pbrainard wrote:Posted By: Gary S
Date Posted: March-02-2016 at 1:45pm
Whats the deal with rebuilding every few years? Tractor oil? is that what BW the ones who designed and built it recommends? ATF is cheap and should just be replaced every year ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: 8122pbrainard
Date Posted: March-02-2016 at 4:12pm
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Stu, If you are rebuilding every couple of years somethings wrong. First off, what do you consider a rebuild? A clutch pack and a seal? That's not a rebuild!! Second, who's the guy who "rebuilt" the trans, If he did a proper job, you shouldn't need to even look at it for YEARS!!! I've got a Velvet that hasn't been touched in 52 years. It sounds like you found a back yard hack to "rebuild" the trans two years ago. What was wrong with it that needed repair? What did this guy do? BTW, running hydraulic in it isn't the greatest idea even if it's the proper weight. It doesn't contain the high detergents like ATF does. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: GottaSki
Date Posted: March-02-2016 at 6:18pm
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I added an FL1A to mine after putting in fresh clutches, seals, and shimming the forward pack. Should be good for another 28 years. May need a fresh pump prior, we'll see. Monitored line pressure after the filter, no delta.. That said, Im not predicting any tangible extended life till the next repack. Just wanted to do it. Like Pete sez, put effort into frequent fluid changes after a quaility build, about the best one can do. If the forward pack is too loose and isn't shimmed right, the forward piston only had so much throw, so runs out of clamping pressure ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: GottaSki
Date Posted: March-02-2016 at 6:25pm
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I suspect 'the guy' saw BW's come in from old mini bulldozers and such, hence the tractor oil friendly advice. Stu these have been slightly modified for high rpm marine use. The atf has been the preferred and prescribed goto juice for decades. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: 8122pbrainard
Date Posted: March-03-2016 at 8:38am
Tom, It's good you used a large filter so the delta P isn't an issue. When you pulled your Velvet apart, was there any debris in the screen? Stu, So we can try to help, tell us more about the two "rebuilds". What was the Velvet doing? What was done to the Velvet? As Tom mentioned, did the clutch pack need to be shimmed to spec ether of the two times? ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: GottaSki
Date Posted: March-03-2016 at 11:37am
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Pete, there was no hard debri, bit it wasn't entirely clear. Basically a slurry on the bottom and on the screen of the accumulation of fiber from the forward pack, it was almost down to the steel when it began to slip, yanked it apart after the first slip. The trans had a hard 15 years before I got it (then put another 13 on) When i put it together with the bronze plates, thats what likely prompted me to add the remote filer. ------------- "There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing." River Rat to Mole |
Posted By: Hollywood
Date Posted: March-03-2016 at 11:42am
| Pete, he never said he had a Velvet. |
Posted By: TRBenj
Date Posted: March-03-2016 at 11:52am
Check the thead title. Recommend more coffee before posting. |
Posted By: 8122pbrainard
Date Posted: March-03-2016 at 12:11pm
 Kevin, I actually did a double take on the Velvet in the title before posting.  ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: Hollywood
Date Posted: March-03-2016 at 1:44pm
| More coffee. On it. I also thought he said it was an 89. That could be an entirely different thread... Wait, name says 89. More coffee |
Posted By: Warpman89
Date Posted: March-03-2016 at 2:00pm
Sorry for the late reply. When I bought the boat 5 years ago or so the transmission was functional but would slip under acceleration. I pulled it after that summer and had a transmission shop go through it. It was not a backyard mechanic or anything like that. He was one of those old guys that has had his hands in every kind of tranny and used to ski himself and it was a legit shop. I know, not all transmission shops are boat transmission shops but this guy had done work for my company and was very well rounded and had worked on velvet drives before. After I put the transmission back in, it ran well for a few days but then got stuck in forward, the clutches fused together. Maybe I didn't break it in properly or the clutch packs weren't soaked before installation? The next spring I pulled the tranny again and replaced the clutches and seals myself. So far so good. I guess neither of these repairs are technically rebuilds. This boat has about 1100 hours on it so I'm sure there are deeper issues. ------------- Stu 1982 BareFoot Nautique PCM 454 *Under Repair* http://www.correctcraftfan.com/diaries/details.asp?ID=8077&sort=&pagenum=2" rel="nofollow - '82 BFN |
Posted By: Warpman89
Date Posted: March-03-2016 at 2:04pm
That makes sense to me, the guy that mentioned hydraulic oil was an old school type. I'm guessing he wasn't completely up to date.! ------------- Stu 1982 BareFoot Nautique PCM 454 *Under Repair* http://www.correctcraftfan.com/diaries/details.asp?ID=8077&sort=&pagenum=2" rel="nofollow - '82 BFN |
Posted By: 8122pbrainard
Date Posted: March-03-2016 at 9:45pm
Stu, Sorry you had the issue with the "tractor oil expert"! Your experience confirms that he didn't know what he was doing. Like previously mentioned:
No, there isn't a break in and no, the clutch pack doesn't need to be soaked. Sounds like you did a better job that a guy that's "has had his hands in every kind of tranny"! BTW, just because someone skis, doesn't mean he's a good mechanic. A good example would be are very our and highly respected Jbear! ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |