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Converting the 73 PK to a dual spool hyd valve


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#1 MNGB ONLINE  

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Posted February 07, 2017 - 09:39 PM

Hi, well today I started to convert the 73 PK from a single spool hyd control valve to a dual spool valve, that provides an easy way to have hyd angling on the plow blade  power angling on the mid mount grader blade,  hyd lift on the tow behind tiller and other implements.

Anyway I bought a dual spool valve off e bay and started fabricating the mount to install it on the PK.

If there is interest in the dimensions parts needed etc I would document them here if not I'll just show how it ends up.

HPIM1411.JPG   HPIM1415.JPG


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#2 ducky OFFLINE  

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Posted February 07, 2017 - 09:46 PM

That will be a nice addition.


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#3 Alc ONLINE  

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Posted February 08, 2017 - 06:32 AM

The one end cap looks different , is that for a "float"  feature ?


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#4 KennyP ONLINE  

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Posted February 08, 2017 - 06:36 AM

Nice looking mount! So the fittings will be on top?

Add all the info you can, someone down the road may find that helpful.


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#5 MNGB ONLINE  

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Posted February 08, 2017 - 01:31 PM

The one end cap looks different , is that for a "float"  feature ?

Hi Alc, yes that's the spring assy for the float detent  are

Hi Kenny yes the fittings are on top with the PK installation, & Ill post the numbers and more picture as it goes.


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#6 MNGB ONLINE  

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Posted February 08, 2017 - 10:38 PM

Hi, did some work on the hydraulic valve conversion started the conversion by purchasing a dual spool valve from a seller on e bay this valve came from a 300 series John Deere GT, the valves on the JD's are remote mounted so there are no levers and this valve uses 1/4" 'O' ring Boss fittings. Next I got a piece of 1/4" flat stock 4.5" X 6"  used some 1.25" angle 1" long to make the hinges for the levers, the valve body has to be 5/8" above the base plate for the levers to work so I got 2 5/8" spacers to raise the valve. Next I removed the single spool valve from the PK removing the seat makes it much easier but leaving the flat mount in place the new base is bolted to the original mount using the same bolts and holes then its a matter of reconnecting the hoses.

 

HPIM1411.JPG HPIM1412.JPG HPIM1414.JPG HPIM1415.JPG HPIM1416.JPG HPIM1417.JPG


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#7 KennyP ONLINE  

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Posted February 09, 2017 - 06:07 AM

Cool! I have most of a JD140 H3 out back. Trying to decide if I want to strip it or what. Nice 3 spool valve on it.


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#8 classic ONLINE  

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Posted February 09, 2017 - 08:21 AM

That should work out great GB. I'm planning on doing something similar to my PK when the weather breaks. Thanks for posting this!
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#9 MNGB ONLINE  

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Posted February 09, 2017 - 09:16 PM

Hi worked on the hydraulic valve install some today, did finally get it on the tractor, wasn't paying close enough attention and set the base plated to far back and the valve body was up against the hyd tank so had to relocate it then things progressed from the it is installed but I discovered I don't have any -4 'O' ring boss fittings went to town and checked at Fleet Farm and all they had were some 45* ones  I didn't think the hoses would reach and they didn't stopped at a hydraulic shop they were out and had just reordered and it will be a week or so so no hose cylinder hose connections did get the pressure and return hoses hooked up.

HPIM1418.JPG HPIM1429.JPG HPIM1430.JPG HPIM1431.JPG


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#10 MNGB ONLINE  

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Posted February 16, 2017 - 09:21 PM

Hi all, have not updated this as I was waiting to get hydraulic fitting for the control valve to connect the hoses to the cylinder well after watching the fitting  come into St. Paul MN and then promptly leave for Kansas City and reside there for a couple of days they finally got back to MN, and wouldn't you know it the -4 fitting are to small I had not paid close attention and they are really -5's (this must be a John Deere thing) in all my years I've never used a -5 fitting so I had to reorder so now its to see when they get here.


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#11 KennyP ONLINE  

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Posted February 17, 2017 - 07:18 AM

Most valves I have messed with so far have been -6.


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#12 MNGB ONLINE  

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Posted February 17, 2017 - 08:26 AM

Hi Kenny yes I have 4 other valves all are -6 this is a new one on me, I think its a JD thing to get you to go to them for parts.


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#13 KennyP ONLINE  

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Posted February 17, 2017 - 08:28 AM

Nice info to know!



#14 MNGB ONLINE  

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Posted February 23, 2017 - 08:55 PM

Hi, well finally got the fittings needed to finish this project up, ordered 4 90 degree swivel -5 fitting wouldn't you know it the ports are to close together to get 90 degree fitting in side by side so ended up using 2 90's and 2 45 degree JIC fittings that meant that I had to fabricate a couple of hoses for the remote, not a big deal since I have Aeroquip hose and fitting. Got it all installed started the engine and gave the valve a try lift hitch worked perfect and the hydraulic cylinder attached to the remote worked the same so its a done deal.

After all the minor problems I had with this install I would not recommend a valve from a John Deere 300 series GT, the valve works good but finding fitting was a hassle, last year I had a valve from a Bolens HT series and it installed much easier it came with levers and used -6 fittings easy to get most anywhere. Added every thing up and I have about $133.00 in to this conversion.

If any are looking for hydraulic fittings hose parts etc heres a couple of companies that I dealt with the products were good and service was good

http://www.hoseandfittings.com/

http://www.discounth...com/default.asp

HPIM1444.JPG HPIM1446.JPG HPIM1447.JPG HPIM1449.JPG


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#15 KennyP ONLINE  

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Posted February 24, 2017 - 05:51 AM

I use Surplus Center for most of my fittings.


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