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290A Leg Vibration

Discussion Forum at MarineEngine.com » Volvo Penta Diesel » Archive through December 27, 2007 » 290A Leg Vibration « Previous Next »

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Phillip Davy
New member
Username: philorden

Post Number: 1
Registered: 12-2007
Posted on Monday, December 10, 2007 - 05:18 am:   Edit Post Delete Post View Post/Check IP

Following 6-8weeks of no use started up my AQAD31A and brought up to temp, pushed off my mooring and noticed lots of vibration on the steering, checked prop etc all ok but the leg is vibrating badly. Topped up hydraulics to no avail. I have a draining tidal mooring and can only assume that the boat has come down awkwardly and done some damage as it was fine last time out - any ideas..?
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Dwight Brooker
Member
Username: sailmaster

Post Number: 64
Registered: 05-2006


Posted on Monday, December 10, 2007 - 07:01 am:   Edit Post Delete Post View Post/Check IP

You may have bent the prop shaft or the prop may be out of wack. Take the prop off and send it to a prop shop to check it and check the run out on shaft.
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Morten Ringvold
Senior Member
Username: haffiman37

Post Number: 2303
Registered: 04-2006


Posted on Monday, December 10, 2007 - 07:15 am:   Edit Post Delete Post View Post/Check IP

If the drive is 'shaking' it might be the actuator valve on the power steering. On the older version there is a grease fitting that most people forget.
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Phillip Davy
New member
Username: philorden

Post Number: 2
Registered: 12-2007
Posted on Monday, December 10, 2007 - 07:19 am:   Edit Post Delete Post View Post/Check IP

Thanks for the prompt replies gentlemen, I have checked the prop and it's as new.

I will get the maintenance manual out and check the 'actuator valve' - is this part of the trim n tilt mechanism..?
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Morten Ringvold
Senior Member
Username: haffiman37

Post Number: 2304
Registered: 04-2006


Posted on Monday, December 10, 2007 - 07:29 am:   Edit Post Delete Post View Post/Check IP

The valve is in the power steering cylinder.
Take off the pump belt and start. If vibrations stop, that is where the problem is. It might even be a sticking steering cable that does not let the valve find its 'neutral' position.
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Phillip Davy
New member
Username: philorden

Post Number: 3
Registered: 12-2007
Posted on Monday, December 10, 2007 - 08:14 am:   Edit Post Delete Post View Post/Check IP

Thanks Morten, I'll give that a go and let you know how I get on.

Kind Regards,
Phil.

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