question eager beaver transport pins

[enginewizard1969]

Hi I am helping a local museum and we have a eager beaver which has a few problems One is a hydrolic leak which shouldn't be to hard to sort.!!! The main question is does it have any pins in the hydrolic system to stop the lifting gear moving when being transported the reason is that the lifting gear moves in all directions but not not tilt back or forward many thanks

 

Graeme

[antarmike]

Hi I am helping a local museum and we have a eager beaver which has a few problems One is a hydrolic leak which shouldn't be to hard to sort.!!! The main question is does it have any pins in the hydrolic system to stop the lifting gear moving when being transported the reason is that the lifting gear moves in all directions but not not tilt back or forward many thanks

 

Graeme

 

There is no mention of any such pins in the manual, nor, as far as I can see, is there anywhere that they would be fitted.

 

THe whole carraige and the way it fits to the mast is very loose. Driving down the road, or cross country, the forks, the carraige they are on and everything wobblles and crashes allover the place. It might not have done from new.

 

Unlike modern hydraulics, there are no Pilot operated check valves, fitted to the cyinders, so any tendency for the pistons to move is resisted only by the spool valve, consequently the flexible hose between the cylinders and the spool valve is under fluctuating pressure every time you hit a bumb, and this causes the pipes to flex, and expand, allowing some movement of the cylinder.

 

It is just the result of a primative design compared to modern design practice.

 

When air transported the mast would be folded right back, so it rests on the fully closed ram, at an angle of 60 degrees, so there is quite a lot of weight holding it in place.

 

Where exactly do you get the movement, and are you talking about the FLT moving on its own, or when it is carraied on a vehicle?