8430 hydraulic question

[Moline_guy]

Brother bought a 8430, just wondering what the hydraulic pumps are rated at for gallons per minute? Northern hydraulics catalog has a flow meter, but they want 300 for it, is there any way to make a flow meter for less than that? He plans to use it to pull a 787 cart and 42' 1850. Neigbor has pulled same set up with a 4850, so hp wise should be ok, just wondering about hydraulics. Thanks for any replies.

 

[HeyPigFarmer]

According to the John Deere parts website (jdparts.com) the 8430 uses the same hydraulic pump as the 4850, which flows 29.5gpm, replacement number AR94661.

 

[rexhellwig]

I'm wondering if your brother bought an 8430 row crop tractor which is still a current production tractor or if you are talking about a late 1970's articulated 4WD 8430.

If it's a late model row crop, it'll have plenty of hydraulic capability.

But if we are talking about an old 4WD 8430, IF everything is in spec, {that's a pretty big IF} it should do everything the 4850 did. If you were to plug in a flow meter at the couplers, you would get about 10 GPM at idle and the flow would increase to 20 GPM with the engine revved up.

 

[Moline_guy]

Thanks for the replies, yes it is the old 8430 4wd, has what apppears to be a 50 series engine and is in overall good condition, heard a lot of negatives on them but for 10 grand it seems like a descent machine, it has pto,3pt and came with a dozer and good tires and duals. He was looking at an 8640 earlier but learned the 84 series with the 466 were a little more reliable. He got a good deal on the seeder and its in good condition, we have run the older versatiles for a lot of years on tillage equipmetn but from the people we have talked to does not sound like their hydraulics will keep up the fan speed, so will either buy a flowmeter or find someone who has one to make sure pump on the deer is close to specs, thanks again.

 

[rexhellwig]

If you don't have a flowmeter, there is a "poor man's" way to get in the ballpark.

Set the RPM at half throttle. With warm oil, raise and lower the three-point several times as fast as it will go. There should be no "chattering". Now check the time it takes to raise the hitch from full down to full up. If it will do it in around three seconds, you're in pretty good shape.

 

[Anonymous-0]

We used to run a JD 8440 articulated on a 787/1850/36 foot. You should be good for hydraulic capacity as long as the pump is in good shape. Power and lack of power shift will be a bigger issue if you have hills.

 

[buickanddeere]

Are any of the hydraulic loads motors or is it all hydraulic cylinders? Are the hydraulic cylinders all double acting?
There is a flow control valve often hidden under years of dirt & slobbered oil. Depending where they are set it can cause some mystery low flow problems.

 

[Anonymous-0]

Good point about flow control valves! There are none on the air cart or the toolbar but make sure the ones on the tractor are set to the rabbit. They are probably buried under dirt and grease and it's a little lever located just above each hydraulic outlet. I always used to set all three on rabbit (ie. markers, toolbar, and fan motor). There will probably be another line that is a drain line from the fan motor that you will have to plumb into the back of the transmission sump. There is plug that you can remove and you will have to attach a female coupler to a pipe to attach it too.
The fan motor is what takes hydraulic capacity. Other than that everything else is just double acting cylinders.

 

[buickanddeere]

AR114664 KIT for the return line from the hydraulic motor to the transmission.
Power Beyond RE231706 FIELD INSTALLATION KIT is a full flow uninterupted direct oil supply from the main pump.
If there are separate hydraulic controls for the fan on the planter. The best operation of the fan with the coolest, highest pressure oil that uses the least engine HP and heating of the transmission/hydrailic system. Is to take fan hydraulic supply from the Power Beyond. And return the fan oil with the tranmission kit.
Once you install the kits you will wonder why anybody trys to get by without them.
These two kits will also free up a hydraulic remote selector valve for others uses.

 

[Moline_guy]

Thanks again for all the input and part numbers, it does not have the power beyond but his 4450 does so i think he is planning to do the same to the 8430. I run a 8 row 800 cyclo planter and plumbed the fan return like was mentioned into my 1466 and never had any problems, but those carts are running a lot more air than my little planter. 42' is a big load for 200hp, but most of the land around here is flat, maybe next year he will be able to get a bigger tractor, this is his 3rd year farming and first year for his own planting equipment. He does not have internet, so i have been trying to help him out a bit, he has talked to a mechanic at the JD dealer and got some input from him also, thanks again.