Custom hydraulic backhoe thumb

[dfkrug]

This little valve is intriguing, but for most applications you would need to switch both lines for complete control, and that
one does not do that from what I can see.

Sorry, I thought you had used the 2-solenoid manifold-type valves before. HydraForce calls those "sandwich valves".

I am a proponent of the simplest and/or most economic solution, so I like this HydraForce valve if someone wants
to switch 2 hydraulic circuits simultaneously. It is a simple 2-position valve that requires only one solenoid
to control it. I have posted the hydraulic schematic here to show how simple it is.

The large 2-solenoid valves sold by SurplusCenter, WRLong, and others have 3 positions with an open
center at neutral. One solenoid pushes the spool, and the other pulls it.

This HydraForce valve is bidirectional so needs only 2 positions and DOES switch two lines
for complete control.

At the risk of getting into the weeds here, these solenoid valves can only push or pull, not both,
and generally don't care about polarity.

 

[avc8130]

Sorry, I thought you had used the 2-solenoid manifold-type valves before. HydraForce calls those "sandwich valves".

I am a proponent of the simplest and/or most economic solution, so I like this HydraForce valve if someone wants
to switch 2 hydraulic circuits simultaneously. It is a simple 2-position valve that requires only one solenoid
to control it. I have posted the hydraulic schematic here to show how simple it is.

The large 2-solenoid valves sold by SurplusCenter, WRLong, and others have 3 positions with an open
center at neutral. One solenoid pushes the spool, and the other pulls it.

This HydraForce valve is bidirectional so needs only 2 positions and DOES switch two lines
for complete control.

At the risk of getting into the weeds here, these solenoid valves can only push or pull, not both,
and generally don't care about polarity.

So is that basically a diverter?

 

[dfkrug]

So is that basically a diverter?

In the sense that it diverts flow from 2 circuits to 2 others, yes.

Here is a schematic of a typical Vickers 2-solenoid manifold-type valve, often seen on FELs,
used to divert flow from existing circuits to a grapple, 4-in-one, blower, etc. Note the
usually unnecessary center position.

BTW, one of the reasons I tend to buy valves from HydraForce and motors from White is
the docs seem easier to access and more infomative.

I had to get this JPG off of a valve for sale on eBay, as I could not find it on the Eaton/
Vickers site.

 

[IslandTractor]

She wasn't the instructor, she just slept in a Holiday Inn.:laughing:

 

[dfkrug]

Here is another nice 6-way monoblock valve, this one is in cast steel and setup for higher
flow. Only $121 on eBay now, shipped (item#201196713523).

 

[kennyd]

Sorry, I thought you had used the 2-solenoid manifold-type valves before. HydraForce calls those "sandwich valves".

I am a proponent of the simplest and/or most economic solution, so I like this HydraForce valve if someone wants
to switch 2 hydraulic circuits simultaneously. It is a simple 2-position valve that requires only one solenoid
to control it. I have posted the hydraulic schematic here to show how simple it is.

The large 2-solenoid valves sold by SurplusCenter, WRLong, and others have 3 positions with an open
center at neutral. One solenoid pushes the spool, and the other pulls it.

This HydraForce valve is bidirectional so needs only 2 positions and DOES switch two lines
for complete control.

At the risk of getting into the weeds here, these solenoid valves can only push or pull, not both,
and generally don't care about polarity.

D, I think you are confusing a "diverter" and "valve" in this discussion, diverters do not have a center position, they are either switched one way or the other to direct flow from a valve. What you see from WR and SC mounted on a subplate are NOT diverter's, but rather solenoid operated control valves plumbed in to the PB lines-that's why they have two opposing solenoids that move the spool one way other the other to operate a function.

 

[kennyd]

So....consider this valve, from the HydraForce catalog. One solenoid, six-way:
SV12-60 Spool-Type 2-Position, 6-Way Hydraulic Cartridge Valve

Not small in size, and I do not know what it would cost. You have to ask a disti.

I hope someone gets a quotation. It should be way less than the usual 2-solenoid spool-type diverter/
selector sold by the likes of WRLong. That's the type that requires the purchase of a manifold, too. The
HydraForce unit is a monoblock that does not.

$140 each. Not too bad. Takes a few weeks to get.

I don't quite understand the six port configuration and operation but that certainly is quite a bit less expensive than the WR Long diverter valve. Not sure what the relative benefits/pros/cons are of this valve vs the more standard diverter valve set up though. I have a diverter valve from WR Long that runs my grapple from the FEL circuit.

Not bad at all. Did you use the MFGR quotation request form on the HydraForce website? If so,
you then have to go to a disti to sell/ship it to you. Maybe adds $35-50.

I see no downside to using this valve over the manifold-mounted valves. It is SOOOOO much less, too.

I just talked to my supplier about this, that $140 is the spool alone, no solenoid coil or body. Your looking at over $300 complete with a DIN or Deutsch coil, and SAE ports.

 

[avc8130]

I just talked to my supplier about this, that $140 is the spool alone, no solenoid coil or body. Your looking at over $300 complete with a DIN or Deutsch coil, and SAE ports.

Which actually puts it more expensive than the diverters you offer.

ac

 

[kennyd]

Which actually puts it more expensive than the diverters you offer.

ac

Correct, and with no electric's either, and its harder to mount as the ports are on three sides, it's also over 9" tall.

 

[avc8130]

Correct, and with no electric's either, and its harder to mount as the ports are on three sides, it's also over 9" tall.

I'm pretty excited about just paralleling the curl and installing the one valve. The plumbing is easy, the electrical easy. Yes, I lose 100% total control of the thumb, but the installation and cost advantages are significant.

A full-on diverter is going at the front of the machine to steal curl for a future grapple.

ac