Decoding hydraulic hose date codes

[Discount Hydraulic Hose]

This is a new John Deere tractor, correct?

The hoses in your photo are from Manuli, an Italian manufacturer. In today's global economy, I wouldn't read too much into it, but I am a little surprised to see that particular brand of hose as original equipment on an American made tractor. You might want to look at some other new John Deere equipment to see if any of it has the same hose.

 

[Dutch445]

I think these hoses are on an attachment the OP
purchased, a Frontier Branded snowblower which
was made by Rad Technologies.
another post here:
http://www.tractorbynet.com/forums/new-member-introductions/197659-frontier-snowblower.html

 

[JohnNewYork]

The dealer called today and saidI was right about the age of the snow blower they confirmed that the snowblower was infact a 2009 unit.

they offered to extend the warrenty for a full year - that was very nice of them wasn't it

the dealer sold a ~ 2 year old piece of equipment at full price and neglected to verify the built date of the unit(s) power pak and snowblower.


I have used this machine twice. each time the discharge chute fails to rotate the discharge direction. The Dealer had to service the unit each time, they put 5 hours on the tractors hour meter fixing the problem. I used the machine 18 minutes the first time, the second about 35 minutes. I am very discouraged

 

[kennyd]

I have used this machine twice. each time the discharge chute fails to rotate the discharge direction. The Dealer had to service the unit each time, they put 5 hours on the tractors hour meter fixing the problem. I used the machine 18 minutes the first time, the second about 35 minutes. I am very discouraged

That my friend is a function of the "regen" or "regenerative" function of the joystick valve. The short answer is to not push the joystick so far to the right...

Here is a copy of a little article I wrote for the DT site explaining it a little:

Regen is a "feature" of most modern FEL (Front End Loader) valves, it's on the Dump (joystick far right) circuit, and is also referred to as "Fast Dump". The reason it is nice to have is that without it, the weight of a filled bucket can actually "pull" the bucket down faster then the fluid can enter the other side of the cylinder, this will create a air pocket and give the bucket a "floppy" feeling until the joystick is held in the dump mode a few seconds to refill the cylinder pushing the air past the seals. So we add "regen" or "regenerative" function to the valve.

Regen solves this problem by actually filling both sides of the cylinder at the same time with hydraulic fluid. But how will that work you might ask? Well, because there is more volume on the side of the cylinder that extends it since the rod is taking up space in the other side, it "overpowers" the rod side and lets the cylinder extend-thereby dumping the bucket. So since now both sides of the cylinder are "pressurized", the air pocket can not develop, eliminating the "floppy" bucket syndrome. One other added bonus is that the bucket actually dumps faster due to the higher flow rate required to do all this, that's why it's referred to as "fast dump" sometimes.

So, now you may be asking hey, this is cool and all that, but why do I need to know about it?? The answer to that is simple, if you ever try to run a snow plow with two SA (single acting) cylinders, or a cylinder that drives a chute rotator on a snowblower you will soon find out that they won't work if you push the joystick to far right in the regen mode. The plow won't work because since both lines are pressurized-both cylinders will be trying to extend at the same time binding everything up. The rotator won't work because there is no weight pushing the cylinder closed like there is on the loader.

On most, if not all John Deere tractors there is a lockout that the limits how far the joystick travels to the right to keep it out of the regen mode.

If you search the term "regen" there is lots more reading also.

 

[JohnNewYork]

Thanks for the post: I don't know if I agree with your assement of this issue. My snowblower is controlled by the electric solenoids and simple on-off rocker switches the tractor has no control over the regen of the snow blower hydrolic.
just so everybody knows: The snow blower has a seperate PTO driven hydrolic pump called the "power pack" which produces oil pressure to allow the movement of the snowblower, direction of the discharge chute and the angle of discharge. Once the PTO is engage the power pack make pressure to run the blower. you then can now use rocker switches to control the direction and angle of discharge. Once the problem starts ( rotation in one direction only) ( can't control both directions of the discharge chute ) it does not resolve itself, ever. however in this state the snowblower works ok and the chute angle control work( both directions)

thanks

john

 

[J_J]

Are you sure the reverse solenoid is activating. Install a gage in the motor circuit. Is there a manual activation on the solenoid, if so try that.

 

[JohnNewYork]

thanks

When the problem started I asked if there were a manual overide. The service tech said no ( their solution was to swap the hoses).
I see a small fitting ( for lack of a better word) on the mainfold that looks like I could depress the center pin and trip the solenoid. Is this correct?

 

[kennyd]

Thanks for the post: I don't know if I agree with your assement of this issue. My snowblower is controlled by the electric solenoids and simple on-off rocker switches the tractor has no control over the regen of the snow blower hydrolic.
just so everybody knows: The snow blower has a seperate PTO driven hydrolic pump called the "power pack" which produces oil pressure to allow the movement of the snowblower, direction of the discharge chute and the angle of discharge. Once the PTO is engage the power pack make pressure to run the blower. you then can now use rocker switches to control the direction and angle of discharge. Once the problem starts ( rotation in one direction only) ( can't control both directions of the discharge chute ) it does not resolve itself, ever. however in this state the snowblower works ok and the chute angle control work( both directions)

thanks

john

OK, John...I thought just the motor was powered from the "power pack" and the chute control was done with the joystick...I have never seen one of these monsters up close so I was only ASSuming

Sounds like an electrical problem then.

 

[J_J]

thanks

When the problem started I asked if there were a manual overide. The service tech said no ( their solution was to swap the hoses).
I see a small fitting ( for lack of a better word) on the mainfold that looks like I could depress the center pin and trip the solenoid. Is this correct?

Some solenoid have a manual override option. It may be under the cap of the solenoid. It could be a push pin, or turn and lock feature, etc.You might be able to clean the plunger if it is sticking.

What is the brand name of the solenoid valve?

 

[JohnNewYork]

Good News. The Dealer conceded to get me a NEW snowblower unit.

( then the problems start all over again) I'll know what to look for this time:thumbsup:.