600 hydraulic question

andyinct

Member
On my 640 there is the plate under the seat where a remote valve would be. There are some pipe plugs in this plate. Are one of these plugs pressure and one return? I would like to run a single acting cylinder for a snowplow - I have a valve already. Can this be done? Which is the pressure port and which is return?
Thanks
 
The cover below is typical of what you should have on your 600. Do you have something different?
Maybe have a photo?

100_2016.jpg
 
There are 5 bolts that hold the cover on. 4 around the perimeter and the smaller one in the middle.
The larger hole in the middle is 1/2" NF threaded bolt with a teflon washer.
I believe you can use a hollow bolt and banjo fitting there and chain your lift arms down then use the lift handle to raise and lower a one way cylinder on your snow plow.
When you use a typical remote valve you do not use the center bolt. And you do not lose your 3 point function like you would if you chain your lift arms down.
You can buy a "banjo fitting" with hollow bolt to adapt a hose to the center hole. Uses the same 1/2" NF thread. Available from any dealer or hydraulic shop.
You can see the banjo fittings in the photo below.

100_1868.jpg
 
I am thinking that oil plug is a 3/8s pipe thread. I believe all NAAs and 100 series plates are 3/8s pipes plug with oil from this opening in balance with the lift arms.
 
(quoted from post at 23:32:51 03/02/15) I am thinking that oil plug is a 3/8s pipe thread. I believe all NAAs and 100 series plates are 3/8s pipes plug with oil from this opening in balance with the lift arms.
f course you are correct Wayne. The other guy gave an answer for a later model tractor. Not uncommon at all, see it all the time where the assumption is, "whatever I have must be like what everyone else has".
 
If the 3/8 pipe plug has pressure that will work a single acting cylinder with the lift arms? Am I understanding that correctly?
 
(quoted from post at 20:32:51 03/02/15) I am thinking that oil plug is a 3/8s pipe thread. I believe all NAAs and 100 series plates are 3/8s pipes plug with oil from this opening in balance with the lift arms.
 
new to this, I have a ford 600 2 years ago hydraulic worked good. I park for 2 years when to used and the lift would not work pump is working good, fool around all day with it and got lift to come up slow if I pick up lift with hand. took top plate off and check O-rings were flat some what clean and put visline on I have to run r.p.m.s. hight to make it move at all, thanks
 
(quoted from post at 08:56:05 03/03/15) new to this, I have a ford 600 2 years ago hydraulic worked good. I park for 2 years when to used and the lift would not work pump is working good, fool around all day with it and got lift to come up slow if I pick up lift with hand. took top plate off and check O-rings were flat some what clean and put visline on I have to run r.p.m.s. hight to make it move at all, thanks
he o-rings under that plate are simple seals, as a gasket would be. They seal fluid in or let it leak out. If not leaking out, then they have nothing to do with performance of the lift. The one o-ring in the system that is performance related & gets all the attention is the one on the unloader valve. To access it, you have to remove the top cover & dig into the valve body/lift ram casting/assembly.
 
(quoted from post at 06:23:33 03/03/15) If the 3/8 pipe plug has pressure that will work a single acting cylinder with the lift arms? Am I understanding that correctly?
hat plug is as if you had a control valve between the pump and a cylinder and you stuck a tee in that hose to the cylinder. The plug is your "tee" where the 3 point lift arm ram is concerned. So if you wish to have an external hyd cylinder operate by tapping this point, then you need to restrict the 3-point ram from moving, so that all flow will be to & from your added external cylinder and this is done by chaining the lift arms down such that they can not move.
 
Thanks Wayne. You may be correct.
I guess for some, the fact that I refered to a different type of thread in that cover makes everything I posted suspect or incorrect.
 
o.k I change O-rings in pump still no go, went I had pump off I blew out suc line could hear air coming out in tank. also took off plug on top of pump good flow. took plug off under seat low flow. can kick r.p.m.s up hight and lift will work a littie not much could pump need rebuith
 
(quoted from post at 13:34:46 03/04/15) o.k I change O-rings in pump still no go, went I had pump off I blew out suc line could hear air coming out in tank. also took off plug on top of pump good flow. took plug off under seat low flow. can kick r.p.m.s up hight and lift will work a littie not much could pump need rebuith
here is a check valve, unloader valve, & control valve that all need to function correctly to get full flow to the plug under seat, which is the flow to the lift ram.
 
(quoted from post at 17:57:03 03/04/15) how would I check unloader and control valve do I take the top off, thanks for your help
es, must remove top cover (lift arms, touch control, seat, etc. are attached to this top cover) in order to get access to these valves..
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top