135/165 Vapourmatic Bankable Valves

[Tentman]

Hello Guys

I'm installing the Vapoumatic Massey selector valve that has the bankable spool vales that bank directly onto the selector - 4511 series. Its going onto a 165, I had a pile of parts from two different systems and I am picking out the "best bits"

The end (or last) plate for the bank has a "T" outlet, this I assume goes back to "tank" on top of the gearbox ??

Whats a bit confusing is I have a spare "end plate" with a loop of hose from "T" to the left hand upper hole - if I use this one does it do away with the necessity to go back to the top of the gearbox.

Man am I a hydraulic dunce - I can't even figure out if I understand the post now !!

Cheers - Foster

 

[DavidP, South Wales]

Hello Foster, how you doin?
Ok, I'll confuse things a little more now perhaps!
I'm not familiar with this Vapormatic part so I'll give a general answer which hopefully will help. The normal setup for a valve block is to have the oil supply into the block at the 'P' end and then out through the 'T' end or port back to the reservoir. If your block is part of the isolating valve then you will not have an external supply line or return line. What I suspect that you may have a what in the UK is known a a 'carry-over' line. If you connect a block at the 'P' port as normal and then connect a second block from the 'T' port on the first block to the 'P' port on the second and then back to the reservoir, neither will work properly. When the levers on the second block are moved you may have the levers on the first block moving on their own back and forth. This is because the standard block is not designed to have any pressure in what is effectively the return line. With the 'carry-over' type oil is sent through the first block where it can be used to operate things and then the oil flow is sent to the 'CO' port of the second block where it will also work things if required and then to the reservoir.
Perhaps the easiest description is that the standard block MUST not have any pressure in the return line on its way to the reservoir but the 'CO' block will allow pressure in the 'return' line which can be used in the second block. Oil is then returned to the reservoir.
Hope this might help a little.
DavidP

 

[Tentman]

Things are pretty good, spring is here and the first lambs are dropping (into a wicked cold wet Sou-Easter but thats life)

Thanks for that David, I have that part of it sussed now I think.

Where on the transmission is it best to put the return (on a 165 ??) I thought the filler cap could be replaced with a standard pipe fitting but it taint so on my 165 at least !!

Thanks

Foster

 

[DavidP, South Wales]

Hi Foster,
The oil filler plug is the best place but as you have found the threads are different. The filler cap can be drilled out and tapped to 1/2" BSP or JIC or Metric depending on whichever system you are using. Alternatively tapped plugs are available.
DavidP