shock horror

[Talbot]

The main engine on my boat is a diesel outboard. It has a hydraulic lift system, which has failed.

Easy I thought get the local yanmar agent to refit a new piston and seals £100 and the jobs done - wrong Yanmar dont supply a re-fit kit. I have to buy a complete new piston assembly and cylinder at a small charge of £650 + VAT and then get it fitted back to the pump at another small fortune.

Not a happy bunny /forums/images/graemlins/mad.gif

 

[Vagabond]

Mark, see if you can remove it and take it to a hydraulic specialist, search for hydraulic hose and equipment.

They should be able to replace the seals for you. It should be standard..... worth a try.

 

[WayneS]

Worth talking to ARS

Used them a lot in the past with our Hydraulics and were always helpful.

Wayne

 

[Talbot]

[ QUOTE ]
Mark, see if you can remove it and take it to a hydraulic specialist, search for hydraulic hose and equipment.

They should be able to replace the seals for you. It should be standard..... worth a try.

[/ QUOTE ]

I would if I could, but dont have the time now - fly out to norway on Sunday

 

[Sans Bateau]

Mark

Give these guys try, they work on site.

http://www.pirtek.co.uk/

Have a good trip to hurdy girdy land /forums/images/graemlins/smile.gif

 

[Talbot]

[ QUOTE ]
Mark

Give these guys try, they work on site.

http://www.pirtek.co.uk/

Have a good trip to hurdy girdy land /forums/images/graemlins/smile.gif

[/ QUOTE ]
Unfortunately its the piston and the shaft that are kaput, and that company only deals with hoses.

 

[Bunny]

Try a local hire shop for info. They are always having to get rams straightened, piston and seals fitted on their diggers etc.

Bob.

 

[tangomoon]

Give Mr Skewes a ring at:


Cellar Marine, Porthallow, Helston, Cornwall, TR12 6PP

Telephone: 01326 280214

He has been working on Yanmar engines for 40 + years. A very genuine, knowledgeable man.

 

[Talbot]

I have been dealing directly with EP Barrus and also with Marine Power at Bursledon, so dont think anything else could have been done.

 

[Boathook]

Hydraulic specialist is the way Mark. As said else where the bits are likely to be standard or even able to modify a new one to fit. Dealers etc are good but sometimes it pays to think outside the box .....

 

[Talbot]

[ QUOTE ]
Hydraulic specialist is the way Mark. As said else where the bits are likely to be standard or even able to modify a new one to fit. Dealers etc are good but sometimes it pays to think outside the box .....

[/ QUOTE ]

Unfortunately there are special valves in the piston which would not be standard, enabling the hydraulics to hold the engine in position when going astern, yet give if something solid is hit.

 

[Boathook]

[ QUOTE ]


Unfortunately there are special valves in the piston which would not be standard, enabling the hydraulics to hold the engine in position when going astern, yet give if something solid is hit.

[/ QUOTE ]

Must be standard relief valve stuff. Doesn't have to be in the cylinder. All diigers, hydraulic winches, etc must have it fitted somewhere in the system for protection. Possibly just a case of linking 2 pipes with a relief valve

 

[boatmike]

I think I would tend to agree. If it were me I would try analysing the function and reverse engineer a new solution.
Mark, Peter is quite right, it sounds a bit over complicated. A replacement cylinder, double acting, with remote flow valves fitted in the line should work. Enabling it to lift if you hit something could be achieved with a simple pressure relief valve.