How do you bleed a drive trim cylinder after removing and rebuilding one? Do you simply cycle the pump up and down several times to remove the air? Also, the pump still contains the original fluid which I assume to be Merc's Power Steering and Trim Pump fluid. I have never had to add any fluid but on past boats I have used 10W30 motor oil to top the pumps off. Should I just use motor oil to replace the fluid I lose or should I change over to ATF at this time? If I do switch to ATF, how would I flush out all the old fluid? Suck out the reservoir, add ATF, cycle several times, suck out fluid, repeat? TIA!
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02-16-2010 10:50 AM
Last edited by Knot 4 Me; 02-16-2010 at 11:05 AM.
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02-16-2010 05:10 PM
Thanks DD! What about fluid? Stay with oil or go ATF?
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02-17-2010 08:40 AM
I've got 10w30 in mine, but only because that is what came in it. If I had the system clean I would use ATF....
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02-18-2010 12:17 PM
How can you tell whats in it? Just by the color?
I just added some Merc drive oil last summer to top it off, but didnt realize it could have been regular oil. I am going to drain both & put fresh Merc stuff in before summer anyway so i guess it wont matter.
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02-20-2010 10:04 AMI use the Napa clear power steering fluid. When bleeding after rebuild, of course you want to fill reserivor, cap the down fittings on the trim line manifold block, tap the up button until clear fuild comes out of the lines, then connect up lines to cylinders, trim up keeping the tank full. Once up to the stop, remove plugs from down manifold ports and tap down button until clear fluid, connect lines and top off fliud level and run down. That should take care of it.
www.merperformancemarine.com
843-399-8785
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02-20-2010 10:08 AMI just usually take the rear ram ends loose and tip them down toward the ground ( make sure you brace them so they don't hit anything) then run them in and out a bunch of times. You will hear when all of the air is out.