Velvet Drive 71C rebuilt testing. Selector Valve issue
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- เผยแพร่เมื่อ 25 ส.ค. 2024
- Even minor scratches in the surface of the selector valve can cause a clutch pack failure ..........................................................................................................Velvet Drive and ZF Marine Service Center. I offer free advise on many marine transmissions. Feel free to call me at 804-333-3677 or email at sales@halemarine.com. I am a second generation transmission specialist with over years forty years experience repairing Velvet Drive, ZF, Paragon, and Hurth transmissions.........................................................
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Its unbelievable how such fine scratches can make such a difference to performance. Thanks for posting video.
Wooow im impressed about all your videos velvet drives! Hear you soon, since im overhauling mine soon
I have a 71c. What would cause my Trans to build enough pressure to blow the dipstick out? Mine blew out tonight so hard that it sounded like a gunshot when it hit the dog box. Rebuilt it last summer and until this happened it hasn't gave me any trouble.
The vent or an overheating issue. Maybe fluid level is possibility?
@@halemarine5991 is there anyway I could send you a picture of the Trans fluid? I don't see any metal shavings in it, but it looks like may have water in it. So maybe Trans cooler is cracked? Not sure how it would have got cracked it's brand new and I drained it when I winterized the boat
If the transmission fluid is pink it has water in it
@@halemarine5991 it's not really pink but it's not exactly red either. It's almost like a purple color. Ive seen water in Trans fluid before but never seen it look like this. Possibly burnt?
Overheating will cause a darkness to the red transmission fluid
How much do you charge for rebuild on these? Recent lost reverse in the middle of our last lake day
www.halemarine.com/index.php?main_page=product_info&cPath=1_18&products_id=2364
Hello i just bought a 1992 ski nautique with 351 and pcm-40 transmission 1:23/1 ratio. Transmission seems to be engaged in gear and cant get it to go i to neutral. I haven't had the boat in the water yet doing work to it and it sat for a long time vut tranny dip stick has clean fluid and doesnt smell burnt. Any clue what the deal is or and pointers would be great thanks
Could these scratches cause the shifter to be stiff when moving between F-N-R?
Yes especially when the transmission heats up
Hi im from Ireland i have two borg warner boxes .I dont have tags near gear leaver but model numbers on the bottom side of each .10-05-065-901 this has a 15 degree v box attached .Can you tell from that number what the ratio is .The second box has no tag either and the number is 10-04-065-905 and im hoping you can tell me the ratios of each by the details shown.Happy Xmas to all and stay safe .
The casing numbers mean nothing to me. The only way to check the ratio is toddler the Vdrive from the transmission section and spin the input shaft, counting how times the output turns.
@@halemarine5991 Thank you .Im a shipwright and not a mechanical engineer .Could i ask you if i turn it by hand will it be good enough or do i need to get it up to 40 cycles ? minute as some guy mentioned to me .But no one is sure.Again Have a peaceful and joyus christmas to you and all of your family and friends .Keep safe and we will see this thing off soon .
@@brotherdom1 Hello again. Use a large electric drill. Thid will give you the RPM needed to apply the clutch plates. The cooling lines need to be connected and fluid in the transmission. Merry Christmas to you as well!
@@halemarine5991Last call ..In your first message you mention toddler ..I assume that means split from transmission.Cheers
@@brotherdom1 Yes seperate the V-drive from the transmission section
I have a 10-17-004 with low pressure at all times. (75psi neutral, 60psi reverse, 60psi forward) at idle. I have slight scratching on my selector valve just like this one. Could that cause a loss of pressure? Thanks for your time!
If you have scratches on the Selector Valve the bore will scratches also. Hone out the bore and replace the the Selector Valve. If the bore doesn't smooth out than it's time for a replacement transmission.
HaleMarine could scratches between the two ports like in your videos cause low pressure in neutral as well? I only have scratches between the two ports just like this video.
The other place that might cause low pressure is where the output shaft goes through the Case housing. Sealing rings or the case itself could be wore
Hey! I have a 1017 004. What should pressure be in neutral, forward, and reverse? Thank you
150 PSI in all postions
Thank you! At what rpm?
@@danmartin6523 Our tesat stand only turns up 537 so all RPMs
Thank you!
What is the spec on pressure for forward and neutral and reverse ? How much does it cost to get some answers on the phone ? I can paypal you .
150 psi is main line pressure
call anytime between 9AM and 3PM
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@@halemarine5991 alright man thank you
Here a link:www.halemarine.com/index.php?zenid=mjk3bp9kdd822jf20mqij9bfh0&main_page=advanced_search_result&keyword=71-a244a&search_in_description=1&categories_id=&manufacturers_id=&pfrom=&pto=&dfrom=&dto=&x=0&y=0