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I recently bought a Massey 550 and noticed while sitting on the seat a lever to the left towards the floor with the words ext 1 and ext 2 on it.
The lever is in
between these to settings. Could you please shine any light on what this lever is for?
Also would it be hard to add a second spool valve to the tractor so i could tip the trailer without the hydraulics going up or down.
The lever is a 3 way valve. When it is in the middle position the rear linkage will work using the square and round levers.
Both the 1 and 2 positions are for external hydraulic services. One of the services has a single outlet and the other has a double outlet. One of the external
outlets is independent of the lift, so if you put the 3 way valve to one of the positions it will lock the arms where they are and only works the external hydraulics (eg. a tipping trailer), to operate the trailer you would use the constant pumping and down positions on the square lever (with the round lever in the fully up position). The other external service always lifts the linkage arms to the top and holds them there before lifting the external service (for example front end loader), on lowering the loader the rear linkage arms will remain in the raised position – this is extremely useful for using a counterbalance weight on the back of the tractor when using a front loader.
You say a second spool valve, does this mean that you already have one spool valve? On a 550 there isn’t normally a second hydraulic pump to power the spool valves, therefore it is necessary to shift the ext lever to the correct position and then put the square lever to constant pumping so that the spool valve is supplied with oil. If the tractor has the original type (Kontack) spool valve then it is possible to simply add another valve slice
using longer bolts.
Hope that helps,
Hi on kontac spool valve ,you mentioned it was convertable,what do you mean by this, as valves I have fitted are kontac valves,also there are screw in screw out stems on them ,how do these work,and will it solve my oil return problem with thanks paul
Anyone out there,I recently bought a 1978 Massey 550.
The rear hydrolics are stuck at up position permanently.
I have been advised it is a stuck valve
Is it a major operation to remove the stuck valve and replace
with a new one. Thanks Bill
regarding the Massey 550 Hydraulic Selector valve…. i broke mine on Saturday – the lever came off in my hands, does anyone know where to get one.. i have seached for one online but cannot seem to find one. Any help much appreciated
Are you trying to operate a single acting ram with a double acting spool? If so you will need to connect the spare outlet from the spool valve to the outlet from the spool block that goes back to the reservoir.
Alternatively you would need a valve with float position or a convertable valve like the original MF Kontac valves that were fitted to the 500 series tractors.
Hi have just piped up a spool block on a massey 550 and beam goes down moaning due to poor oil return,when i pull lever back ,would i be pressurising blanking plug port ,or should slice be modified to let oil go back with thanks paul
The hydraulics control lever is down by the right hand side of the seat.
The TE 20’s only had a single clutch, so the hydraulic pump only works when the clutch is released (either in or out of a transmission gear). Therefore, the hydraulics will only work when either the tractor is travelling (forwards or backwards) or when the tractor is stationary, out of gear and the clutch pedal is released.
Which levers do you use to raise gear on the back of the of a Massey Ferguson TE20. Ia m trying raise up a grass cutter. Thanks in advance