PCM 1.23 Leak
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=36831
Printed Date: November-17-2024 at 1:39am
Topic: PCM 1.23 Leak
Posted By: NAUTIQUEjunky
Subject: PCM 1.23 Leak
Date Posted: July-22-2015 at 9:54pm
So the 1999 Sport Nautique project boat has started puking trans fluid quite often now and out it comes. A experienced mechanic can have it out in about 30 minutes for those of you who want to tackle the job yourself, other wise give your buddy some beer and expect a hour or so.. I would like to post pics of the front pump seal because I haven't seen a picture posted recently.. http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/20150722_191947.jpg.html" rel="nofollow"> [/IMG] http://s1114.photobucket.com/user/862001/media/Mobile%20Uploads/20150722_192902.jpg.html" rel="nofollow"> [/IMG]------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Replies:
Posted By: SNobsessed
Date Posted: July-23-2015 at 10:38am
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Do you know why the seal failed yet? ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: NAUTIQUEjunky
Date Posted: July-23-2015 at 5:14pm
My guess Chris is 800hrs on it lol.. I have it at work now and took the seal out and there is just a very slight wear groove on shaft were the seal rides.. I was able to smooth it with emery cloth.. ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
SNobsessed wrote:Posted By: 8122pbrainard
Date Posted: July-23-2015 at 7:55pm
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Joey, I sure would consider a speedy sleeve on the shaft. Good luck with the seal. I hope the pump isn't worn past tolerance pressurizing the area behind the seal. ------------- /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: NAUTIQUEjunky
Date Posted: July-24-2015 at 11:22am
After closer inspection Pete the shaft had more of a crud ring around it from the longtime leak more than a groove.. I measured the old seal verses new one from Ski Dim and it had expanded almost 1mm do to its age.. And yes I hope the pump isn't worn either after all the Engine issues and interior work trans parts are not in the budget 😔 ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: NAUTIQUEjunky
Date Posted: July-27-2015 at 10:10am
Well here is a update for all who's interested, took the boat out Sunday rode 10min to our anchor spot sat for over 2hrs no leak fired the boat up, rode around for about 20min still no trans leak trailered boat home 20min and lifted motor box at home and trans was dripping off same spot on the bell housing.😠. Makes no sense to me as to y no leaks at the Lake.. I guess my pump is suspected now as you mentioned Pete.. Any ideas of pump clearance specs Eric? I'm gonna pull it back out and check it..  ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: NAUTIQUEjunky
Date Posted: July-31-2015 at 5:24pm
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Ok so apparently the leak is still there but slowed down alot.. I noticed my Damper plate has so movement to it, and the input shaft on the trans has very slight movement as well.. so the front pump seal technically doesn't have a true turning shaft to ride on the the damper is worn..Correct me if I'm wrong Eric.. Looks like it will be coming back out for a new damper plate.. Shame on me for not replacing it while I had the trans out the first time. 😩 ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: SNobsessed
Date Posted: July-31-2015 at 11:43pm
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I haven't heard anyone bring this up lately, but when I replaced the damper in mine, there was some clearance in the shoulder screws. Eric-the-tranny-guy recommended to final tighten those shoulder screws after the tranny was in. He had a way to reach them thru the starter hole, I actually drilled an access hole in the bell housing (hey it's my boat, I can mutilate it). There was at about .010 possible runout if I had randomly tightened it up. I wonder if that could contribute to seal leakage. Hope this info helps. ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: NAUTIQUEjunky
Date Posted: August-01-2015 at 12:20am
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Chris, yeah that makes since to do a final torque of the bolts once trans is installed.. like a auto clutch pressure plate where u have a alignment tool.. we have no such thing with our boats unless u make your own from a junk trans case and shaft somehow.. As far as I can tell it was the original front pump seal that I replaced. And the damper plate appears to be original too with 800hrs on it.. So with it having the play that I observed that's gotta be causing movement on the trans shaft causing the slight leak.. It would be the same senario as a engine crankshaft wobbling on the front engine cover seal in my mind.. it's gonna leak oil.. I just can't stand having anything other than a little water in my bildge so I gotta get this fixed.. ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: KRoundy
Date Posted: August-01-2015 at 6:49pm
I think this should be a CCF rule.  I believe that the preferred damper plate is a Sachs (somebody here can help confirm). I've seen other threads where this is the one people are told to buy: https://bpi.ebasicpower.com/pc/ALTDA-106A/DAMPERS" rel="nofollow - Damper Plate Although I always wonder about the fact that this puppy is held on by three bolts apparently? I'm sure Pete will tell me why that is OK compared to the circular flywheels available from SkiDim. ------------- Previous: 1993 Electric Blue/Charcoal Ski Nautique Current: 2016 Ski Nautique 200 Open Bow |
Posted By: 8122pbrainard
Date Posted: August-01-2015 at 8:04pm
It's all about the shear strength of the 3 shoulder bolts. With a tensile of around 150,000 psi, they can easily handle engine torque. ------------- /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: 8122pbrainard
Date Posted: August-01-2015 at 8:08pm
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Joey, The damper adds no support to the trans input shaft. In fact, it's made sloppy and spring loaded and the reason a common name is a "flex" plate. It's there so engine vibrations aren't transmitted to the trans. All the support of the input shaft comes from the trans itself. What happens with a worn damper is it will put a radial load on the shaft in one spot say if it has a broken spring)s). ------------- /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: NAUTIQUEjunky
Date Posted: August-17-2015 at 7:02pm
Pete understand what you are saying, but my thinking being if the input shaft going into the damper plate has slight play.. and my damper has some play then the shaft has no consistent surface and if it does vibrate any at all fluid is gonna go right past the seal.. Vince at Ski Dim was telling me the damper was suppose to be rock solid on the springs.. no back and forth movement by hand he actually pulled a new one off the shelf while we were on the phone and said the center hub on the damper had no play in it.. ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: Orlando76
Date Posted: August-17-2015 at 7:25pm
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Joey, From looks of your first picture, you didn't loosen your front engine mounts and tilt the engine with bottle jacks method did you? I ask because I'm fixing to pull my transmission to check damper. ------------- Please support The Cystic Fibrosis Foundation 1976 Ski Nautique 351 Escort 1993 Ski Nautique purple and black 351 HO PCM |
Posted By: 8122pbrainard
Date Posted: August-17-2015 at 8:00pm
"Rock solid on the springs" Wow, I want whatever Vince is smoking!  ------------- /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: NAUTIQUEjunky
Date Posted: August-17-2015 at 8:52pm
Todd.. No I did not use the bottle jack method.. I used tie down straps attached to the Frame on my shed.. I would lift the trans coupler by hand and then pull my tie down strap and repeated that until my height was reached I wanted.. It took some muscle but I had no help.. I will.do it that way again if ever needed. ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: NAUTIQUEjunky
Date Posted: August-17-2015 at 8:55pm
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And Pete I have no experience with damper plates.. After all the inboards I've owned I've never had one go bad or had to pull a trany.. I'm just going by what Vince said.. I personally would think a brand new Damper would have little to no movement on the hub if you tried to twist it back and forth by hand. ------------- 1977 MasterCraft Stars&Stripes 1994 Ski Nautique 2000 Super Air Nautique 1986 Ski Nautique 2001 1999 Sport Nautique gt40 current |
Posted By: Orlando76
Date Posted: August-17-2015 at 8:55pm
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Gotcha. ------------- Please support The Cystic Fibrosis Foundation 1976 Ski Nautique 351 Escort 1993 Ski Nautique purple and black 351 HO PCM |