Velvet drive transmission oil cooler

Hoses must be at least 1332 in. Items 1 - 9 of 18.

Body length 12 Hose diameter 1 oil fitting diameter 375 38 NPT.

Velvet drive transmission oil cooler. I changed lately the oil coolers of a similar system Perkins 4108 and BW Velvet Drive 71CR and these are the parts I used. Oil Sump cooler Bowman EC80. Transmission cooler Bowman DC60.

They are available with different hose terminals so. I have a similar setup in my coronado 41 perkins 4108 attached to borg warner 71C velvet drive. On mine at least there is only one oil cooler which is for the transmission oil.

There is a bowman combo heat exchangerheader tankwater cooled exhaust manifold that takes care of cooling the engines freshwater cooling circuit. Velvet Drive Transmission Notes 2. Oil coolingThe oil exits from a plug in front of the breather andReturns through the cooler Return per the drawing above.

Cooling the oil coolerThe water divides after leaving the water pump. When using an oil cooler one line from the pump goes to one of the manifoldsthe other leads to. Circumstances Velvet-Drive suggest using oils meeting Allison C3 or Caterpillar TO-2 specifications.

In addition it may be necessary to experiment with the fluid level in these applications. Do not mix different brands or types of oil. If the transmission oil temperature has exceeded 190 degrees Fahrenheit or if the.

Borg Warner Velvet Drive transmission issues trans cooler. New here but been working on this boat for years. - 86 kevlar classic comp.

As many of you have learned Im sure the older supras were prone to cancer in the floors and stringers. The 71 C and 72C transmissions consist of a planetary gear set and multiple disc clutches. The input and output shafts are in line.

An internal regulator valve controls system pressure. Oil dis charged by the regulator valve is sent to the oil cooler. Always use specified oil cooler hoses and fit-tings.

Hoses must be at least 1332 in. Oil cooler hoses and fittings must be suffi-cient size to maintain transmission fluid in sump at 140-190F 60-88C. Propeller Propeller rotation is described when observed from the rear of the boat stern looking forward bow end.

These transmissions do not hold all that much fluid. Maybe 2 quarts in the trans and possibly another pint in the cooling hoses and cooler. Unless the cooler is above the level of the trans sump you usually wont get to whats in it during a single change.

Check the transmission oil level prior to starting and running the engine. Pull the dipstick and wipe the probe end with a rag. Insert the probe and pull it to read the level.

Low or no transmission fluid oil will cause an overheating condition due to low pressure and inadequate lubrication. Keep your inboard boats transmission running smoothly with a premium marine oil cooler or oil hose. We carry a range of top-quality OEM oil coolers and transmission feed lines.

Sometimes if you bend the end of your oil cooler you can straighten it. Check out our video on it. View as Grid List.

Items 1 - 9 of 18. This manual covers all Velvet Drive transmissions. Data is given to assist you in selecting the proper transmission cooler damper drive and propeller shaft coupling.

Proper installation is a requirement for a valid warranty. Instructions formaking a proper installation are included. Cooler Marine Transmission or Power Steering 12 X 1 X 38.

Body length 12 Hose diameter 1 oil fitting diameter 375 38 NPT. These oil coolers can be used for power steering. You need to flush out the gearJust take the oil lines off the cooler and attach them together by-passing the cooler and do a couple of oil changesUse SAE 10 or 20 wt to flush at the dock.

Be sure you bump it in gear both FWD Rev for flushing out all of the old oil from the clutch packs. The picture above shows that the Velvet Drive oil cooler was installed improperly. The ports for the oil lines to and from the transmission must be on top not on the side.

If oil cooler is not aligned with the ports on top the oil will drain back into the transmission sump giving a false indication of the oil level. On 20072012 at 1231 Bloomsberry said. Ive had my boat for over a year now and the gearbox is a Borg Warner Velvet Drive - 71C.

According to the manual the oil has to be changed every year and the procedure just mentions draining down the sump and the external cooler tank. This is what I call defensive engineering. With coolers in the pressure region the impeller will last longer and mud build-up is less probable if partial blockage occurs flow velocity increases when it happens in the pressure-side.

If occurring in a suction-side cooler it will cause cavitation and. The Velvet Drive Marine Installation Manual states that better cooling efficiency will be obtained when oil and cooling water flow in opposite directions. It also says that a larger sized cooler may be required where oil and water flow in the same direction through the cooler.

Velvet Drive Marine Transmission Service Manual Models 70C 71C Warner Gear. SERVICE MANUAL PRICE 250 vezecr 0Rvc. HYDRAULIC TRANSMISSION DIRECT MODEL Spreparedl and illustrated ar ASI70C and.

I e also con in tions wh be the other igr 71B Denit Warner Gear. The reason I ask is the only things that will normally make those transmissions blow oil out of the vent is if they are. Overheating for any reason.

This includes but is not limited to bad clutch packs bad bearings clogged trans oil cooler. Welcome to Thermaco marine Transmissions. We can LIVE BENCH TEST your marine transmission to check for proper operation oil pressure oil flow to cooler as well as for any possible oil leaks.

Rebuilt Borg Warner Velvet Drive. Model 10-17-000-004 New Style 1 to 1 Ratio Direct Drive. Found out the hard way that the transmission fluid lines hooked up to the transmission cooler are required to go a certain way.

Fortunately shut it down before I did any major damage. The transmission fluid shoud run opposite the water flow. Or bottom fitting on the tranny.

I discussed this with an engineer at. Velvet drive and he says. 87 1191 behind 454 Crusaders.

New raw water pump. One year old heat exchanger. Risers and elbows guessing about 3 seasons but very little rust from the nipple when I replaced water hoses last week.

Rebuilt other trans about 4-5 years ago due to loss of forward reverse. I am at the point where I am going to pull the trans and put in a spare since I can. I have a Ford Leyman Super 90HP engine with a Borg-Warner Velvet Drive Transmission.

Recently I have had to top up the transmission with about a quarter of a pint of ATF every 30 hours of running. There are no external leaks visible or any ATF in the bilges. I have tested the gearbox oil cooler to 7 bars and am confident that its OK.

If your oil is light pinkwhite milky and thick then you may have a water problem. When red ATF transmission oil is mixed with water and churns through the gears of a transmission it gains a milk-shake consistency and turns light pink or white. This is very bad for the transmission and the oil should be flushed immediately.