Do I need a spool valve on my MF135?

Hello!

I have a standard MF135 from around 1966. It has the hydraulics for the three point linkage which are all working well, but I only ever use them for occasionally lifting and moving the odd piece of equipment.

I'd like to buy and use a post rammer, the hydraulics of which nearly all consist of a single ram with single feed pipe. Therefore the hydraulic control requires that I can pressurise the ram to lift a weight, and then release all pressure as quickly as possible.

Is this possible of the existing hydraulic controls, or do I need a spool valve - e.g.

http://cgi.ebay.co.uk/MF-1457052M94-LASER-2-SPOOL-VALVE-BLOCK-/150477995480?pt=UK_CarsParts_Vehicles_CommercialVehicleParts_SM&hash=item23092ffdd8

As I said before, I only use the rear linkage for lifting, which is the outside lever on the standard hydraulic controls. I've never used the inside lever.

I think what's confused me is that I have another 135 that has a front loader. That seems to be tapped off a lug on the gearbox and is controlled from the standard hydraulic levers, so I'm not really sure how it all works.

I do lots of car mechanics and am competent mechanically, but tractors aren't my thing.

Thanks!

If it's only a single acting cylinder you can set up your draft control to run it without needing a another valve. An MF manual would be your best friend. Dave

Hi,
To echo largely what Dave has said;
Depending on the type of knocker that you are planning to buy there should not be a problem in connecting it to the internal hydraulic system but...
It will depend on whethet the hydraulic pressure to raise the hammer is greater than that required to lift the knocker on the 3-pt linkage.
If the knocker is 'lighter' then that will move first. If this should happen you will need to fit an isolating valve onto the front of the hydraulic cover so that you can seperate the flows.
The outer DRAFT lever should not really be used for normal 3-pt linkage work. The inner POSITION control lever will give you more control rather than 'all or nothing' for the lift.
DavidP, South Wales

Thanks both,

I have a manual CD on order, so hopefully that will enlighten me. Thanks for the draft/position tip too!

Gary.