6th scv for 4-in1 added to 4520

   / 6th scv for 4-in1 added to 4520 #1  

Cidertom

Gold Member
Joined
Dec 14, 2005
Messages
478
Location
Benton Co Oregon
Tractor
JD 4520, 2305 Aktive snow-trac ST4
After several requests for details and pix, here is my modification to add an electric valve as a 6th scv to my 4520 to enable a hand control. Basic concept: Using the power beyond I placed a solenoid valve in line to drive the 4-in-1 with a hand control on the main scv joystick.

I used a larger than needed valve to limit the pressure loss through the valve. It is a DO5 series with two solenoids providing push/pull/hold. The hold position links the P and T ports. The control handle is from Deere and is a part for the 110 TLB (pricey). The handle drives two relays, which fires the control valve.

Installing the valve: Made mount with strut. It would be prettier with a custom made weldment, but... The Mount is held up with 1" aluminum pipe segments 5" long and a fitting bolted to the connector mounts. I measured and cut the power beyond hydraulic line from the scv block, then brazed a fitting on. Wouldn't do it again. If I were doing it again, I would use a 5/8" hose with #10 JIC ends (adapt as required) . Remove the short end by removing the snapring from the coupler mount. Remove the steel tube and FF to O ring adapter. Install a hose from that coupler to the T port on the valve. Reinstall the snapring. Using a sweep elbow and a 90 deg hook the power beyond line to the P port. Currently I am using the couplers for the 4-in-1 lines. The 90 fittings on the end of the hoses are welded and I didn't want to fish them out to have them re-coupled (will happen this summer).

I replaced the short cord from the TLB handle with a longer one. I wouldn't do that unless you are used to circuit board re-work with thick conformal coatings. Instead just do a neat job of splicing an extension or find the matching connectors. Make certain you place snubber diodes on both the relays and the solenoids (total of 4) . I placed the relays in the RH fender compartment. I pulled a #10 wire with a 30 amp fuse from the battery terminal on the starter to the fender for this project and future lighting circuits.

It is not as smooth as a manual or porportional valve. For me it works OK. I have considered a restrictor or needle valve in line. The "book" would have a relief valve between the A-B ports.

Not suggesting this modification, if you do it: It's all on you.

Have fun

CT
 

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   / 6th scv for 4-in1 added to 4520 #2  
I'm not trying to be rude or anything but who needs 6 sets of scvs...
 
   / 6th scv for 4-in1 added to 4520
  • Thread Starter
#3  
I'm not trying to be rude or anything but who needs 6 sets of scvs...

I frequently have my rear blade on: it uses 3 circuits. Tilt, offset and angle.

The frontloader uses 3: boom, bucket, 4-in1

total 6
 
   / 6th scv for 4-in1 added to 4520 #4  
Nice job CT:thumbsup:
 
   / 6th scv for 4-in1 added to 4520 #5  
I'm not trying to be rude or anything but who needs 6 sets of scvs...

My 2030 has 4, 2 mid for the loader an 2 rear, one of which I plug the grapple into.

The 6415 has 5, 3 mid and 2 rear. I plan to add a third rear with parts (all JD) bought off ebay and from the dealer.

Never know what you may want to hook up or build ;)

Can't have too much HP or SCVs :D
 
   / 6th scv for 4-in1 added to 4520 #6  
Maximum I have is 3 on my 6420... :p
 
   / 6th scv for 4-in1 added to 4520 #7  
Ya'll consider yourselves lucky, I have two. I also have a FEL that uses them and so need to unplug the FEL to run anything out back. I am working on seperating the buckets off the rear controls and adding a extra stick for a grapple. 5 minimum six is best I think:thumbsup::thumbsup:
 
   / 6th scv for 4-in1 added to 4520 #9  
I'm not trying to be rude or anything but who needs 6 sets of scvs...

I wondered the same thing, but the answers here (front, rear, not having to plug/unplug) have convinced me it's a good idea.

Luxurious *for me* but that's cause I don't use it enough to ju$tify the expen$e.

Enjoy seeing member's ingenuity.
 

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