Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-22-2017, 03:15 PM   #1
Senior Member
 
City: Houma, Louisiana
Country: USA
Vessel Name: M/V LUNASEA
Vessel Model: 45ft Bluewater Coastal
Join Date: Aug 2014
Posts: 496
Velvet Drive

When do you check the fluid in the transmission, when the unit is cold or after running and hot.
__________________
Advertisement

kartracer is offline   Reply With Quote
Old 10-22-2017, 03:34 PM   #2
Guru
 
Donna's Avatar
 
City: Palm Coast
Country: United States
Vessel Name: Southerly
Vessel Model: 1986 Marine Trader 36' Sundeck
Join Date: Aug 2016
Posts: 1,097
Hot
__________________

Donna is offline   Reply With Quote
Old 10-22-2017, 03:42 PM   #3
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 3,461
BW Velvet drive question

See the above thread, it was just discussed a few days ago and will answer your question and some you haven't thought of asking.
__________________
Jay Leonard
Attitude Adjustment
40 Albin
Mystic,Ct. /New Port Richey,Fl
jleonard is offline   Reply With Quote
Old 10-22-2017, 07:21 PM   #4
Guru
 
City: Boston
Country: US
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 609
Quote:
Originally Posted by jleonard View Post
BW Velvet drive question
See the above thread, it was just discussed a few days ago and will answer your question and some you haven't thought of asking.
Prior thread is full of good info.

In practice, I check my fluids before starting so everything is cold.
You can take a file and put min/max marks on the dip stick if needed.
SoWhat is offline   Reply With Quote
Old 10-25-2017, 12:51 PM   #5
Guru
 
Edelweiss's Avatar
 
City: PNW
Country: USA
Vessel Model: 1976 Californian Tricabin LRC
Join Date: May 2011
Posts: 1,860
Quote:
Originally Posted by kartracer View Post
When do you check the fluid in the transmission, when the unit is cold or after running and hot.
There is a Velvet Drive operators manual in this Forums Library (Tab in the upper right corner of this page, manuals, page 2) which you can download and carry with you for your reference. Be sure and read page 13 in the manual about oil bleed down from the oil cooler.
__________________
Larry B
Careful . . .I Have a Generator and I'm not afraid to use it !
Edelweiss is offline   Reply With Quote
Old 10-25-2017, 01:12 PM   #6
Guru
 
City: Fairport
Country: United States
Join Date: Jan 2017
Posts: 1,634
http://www.hyvair.com/pdf/hydraulicfluid.pdf

Looks to be around a 4 to 5% volume change over 100 degrees. So, for a simple rectangular container, that would be a 5% increase from the bottom of the pan (not the end of the dipstick).
diver dave is online now   Reply With Quote
Old 10-25-2017, 02:29 PM   #7
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 7,817
Quote:
Originally Posted by Edelweiss View Post
There is a Velvet Drive operators manual in this Forums Library (Tab in the upper right corner of this page, manuals, page 2) which you can download and carry with you for your reference. Be sure and read page 13 in the manual about oil bleed down from the oil cooler.
Thanks for the reminder. Thatís a good manual.
Larry M is online now   Reply With Quote
Old 10-25-2017, 02:54 PM   #8
Guru
 
City: Boston
Country: US
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 609
Quote:
Originally Posted by diver dave View Post
http://www.hyvair.com/pdf/hydraulicfluid.pdf

Looks to be around a 4 to 5% volume change over 100 degrees. So, for a simple rectangular container, that would be a 5% increase from the bottom of the pan (not the end of the dipstick).
Wouldn't it be closer to 10%? 4 quarts in transmission and reduction gear, with temp rising from 70F to 190F (temp range is 140-190)
SoWhat is offline   Reply With Quote
Old 10-25-2017, 03:09 PM   #9
Guru
 
City: Fairport
Country: United States
Join Date: Jan 2017
Posts: 1,634
I'm using a hydraulic fluid coefficient of volume change per degree figure of 0.0005 / deg.

Moved the decimal over two places (100 deg delta) to get .05. Convert to %, two more decimals. Now its 5% total volume change over temperature. Still not a dipstick change yet. I assumed a straight wall volume, so a 5% change in volume must equal a 5% change in height. A few assumptions made in there, but should be fairly close to a BW VD. Also, my VD never got too hot to place a hand on it.
__________________

diver dave is online now   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 11:34 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×