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Old 21 September 2015, 12:59   #1
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Trim and tilt

Dear forum,
I managed to blow the cylinder wall in my trim cylinder unit leaving a gaping hole - please don't ask me how... but it involved playing. However I replaced the whole trim cylinder unit as well as the axel connecting them both with the tilt cylinder in between. It all seems to be working and holds pressure - BUT - upon refilling with ATF oil I cannot get the hydraulic pump to "grip" the oil and start lifting or lowering the motor. I've tried to air the motor by lifting it manually, even tried filling the oil straight in the cylinders by removing the top nothing - I'm out of ideas. Pump broken even if it sounds ok? Taking any small hint!

The Engine is a Suzuki DF300 2008.

Thanks
Matt
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Old 21 September 2015, 13:13   #2
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Is the manual release valve closed?
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Old 21 September 2015, 13:20   #3
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Yep, sure is!
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Old 21 September 2015, 13:38   #4
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Sounds like the pump could be airlocked then. Try running the pump with the manual release open & then slowly close the manual release whilst the pump is running.
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Old 02 November 2015, 03:04   #5
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Hi again, tried your last tips as well whithout any luck. Next (Cold) step is to take the Engine off and look inside the pump... Thanks for your tips!
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Old 02 November 2015, 03:47   #6
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Quote:
Originally Posted by mattiasb View Post
Hi again, tried your last tips as well whithout any luck. Next (Cold) step is to take the Engine off and look inside the pump... Thanks for your tips!
Sorry I couldn't be more use. I hope you get it sorted.
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Old 03 November 2015, 09:45   #7
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Assume you had it in bits - there is (well, on the Yam unit, but I have a wee theroy they all buy them from the same supplier!) a non return / releif valve which is very easy to loose or unseat the tiny ball bearing that operates it if the unit is in pieces.

Also from memory there should be an over pressure releif valve somewhere i nthe system to stop it blowing up when the piston (s) hit top. I rebuilt mine with that valve wrong way round first time!

Does it sound like it's churning fluid? (i.e it's pumping round in circles rather than not seeing fluid?)
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Old 03 November 2015, 17:18   #8
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If it's air locked you need to bleed it. If you raise the engine so it's off the Rams take the filler cap off and top with atf. Engine down, back up and repeat. You may have to do this a lot of cycles, eventually atf fluid will come out of the filler, but with bubbles keep going til it's just fluid


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