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10-22-2017, 03:15 PM
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#1
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Guru
City: Houma, Louisiana
Vessel Name: M/V LUNASEA
Vessel Model: 45ft Bluewater Coastal
Join Date: Aug 2014
Posts: 529
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Velvet Drive
When do you check the fluid in the transmission, when the unit is cold or after running and hot.
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10-22-2017, 03:34 PM
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#2
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Guru
City: Palm Coast
Vessel Name: Southerly
Vessel Model: 1986 Marine Trader 36' Sundeck
Join Date: Aug 2016
Posts: 1,231
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Hot
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10-22-2017, 03:42 PM
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#3
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Guru
Join Date: Jun 2008
Posts: 5,036
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http://www.trawlerforum.com/forums/s...ion-35105.html
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
Ex boats: 1983 40 Albin trunk cabin, 1978 Mainship 34 Model 1
New Port Richey, Fl
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10-22-2017, 07:21 PM
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#4
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,609
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Quote:
Originally Posted by jleonard
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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.
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10-25-2017, 12:51 PM
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#5
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Guru
City: PNW
Vessel Model: 1976 Californian Tricabin LRC
Join Date: May 2011
Posts: 1,860
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Quote:
Originally Posted by kartracer
When do you check the fluid in the transmission, when the unit is cold or after running and hot.
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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 !
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10-25-2017, 01:12 PM
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#6
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Guru
City: Palm Coast, FL
Vessel Name: Coquina
Vessel Model: Lagoon 380
Join Date: Jan 2017
Posts: 2,570
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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).
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10-25-2017, 02:29 PM
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#7
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TF Site Team
City: Jacksonville
Join Date: Nov 2008
Posts: 11,681
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Quote:
Originally Posted by Edelweiss
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.
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Thanks for the reminder. That’s a good manual.
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10-25-2017, 02:54 PM
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#8
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,609
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Quote:
Originally Posted by diver dave
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).
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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)
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10-25-2017, 03:09 PM
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#9
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Guru
City: Palm Coast, FL
Vessel Name: Coquina
Vessel Model: Lagoon 380
Join Date: Jan 2017
Posts: 2,570
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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.
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