M670 super hydraulic problem

[manitobafarmer12]

Got a 670 super trying to lift deep tiller moves it about a inch then stops can hear pump working and the opposite hose gets rock hard. Have a blade on it and the cylinder cycles fine

 

[Harry in Ky]

Sounds like a coupler not working right. "Opposite hose" is building pressure because return oil isn't making it back into the system. Maybe just a bad male tip. Not all that uncommon.

 

[molinegb]

Put a pressure gauge on outlets. Should be 1200 psi plus.

 

[manitobafarmer12]

Sounds like a coupler not working right. "Opposite hose" is building pressure because return oil isn't making it back into the system. Maybe just a bad male tip. Not all that uncommon.

Tried different couplers samething. It's 4 hydraulic cylinders it's gotta lift

 

[manitobafarmer12]

Put a pressure gauge on outlets. Should be 1200 psi plus.

1350 psi

 

[molinegb]

1350 psi?

On all 4 outlets? If it is your problem external.

 

[manitobafarmer12]

On all 4 outlets? If it is your problem external.

Only have 2 outlets

 

[molinegb]

Only have 2 outlets

Two pair? Two positions on each. Type E?

 

[manitobafarmer12]

Two pair? Two positions on each. Type E?

Yes 2 pairs so 4 outlets but only have tips on one set. Forward neutral and back

 

[molinegb]

Yes 2 pairs so 4 outlets but only have tips on one set. Forward neutral and back

Have 1350 in both directons?

 

[MMDEL]

Do you have 3pt ????? show a closeup of the couplers on the back of the tractor.

 

[manitobafarmer12]

Do you have 3pt ????? show a closeup of the couplers on the back of the tractor.

No 3pt. They're a case coupler and I'm running converters to pioneer tips

 

[molinegb]

You said you have a blade on it also. Are you using same remotes and couplers for blade? Try another implement or cylinder with same dimensions as deep tiller.

 

[Alan K]

No 3pt. They're a case coupler and I'm running converters to pioneer tips

I would check the hydraulic couplers and also check the hydraulic lines from the valve to make sure you aren't going against the valves, meaning working against each other in a single or double acting cylinder.

 

[manitobafarmer12]

You said you have a blade on it also. Are you using same remotes and couplers for blade? Try another implement or cylinder with same dimensions as deep tiller.

Yes using those couplers. I've tried a single cylinder and it works fine just on the ones with more than 1 cylinder it won't lift etc

 

[Jim.ME]

Just another thought. You say you have 2 sets of 2 couplers. Have you followed the hoses from the valve to the couplers to be sure you are pairing the two on the same valve? It has happened before that a coupler for each valve got connected, and what you see will happen. Some manufacturers paired the couplers horizontally and some used vertical pairing.

Some valves can be set to operate single acting cylinders or double acting. I don't know what MM used. Is there such a setting on your valve?

 

[molinegb]

You seem to have pressure and not enough volume. Is your filter clean?

 

[Jim.ME]

In your first post you said the tiller moves about an inch, you here the pump working and the opposite hose gets rock hard. As Harry said in post #2 that sounds like a coupler issue not allowing oil to return to the reservoir. I added in post #16 that being in the wrong coupler or a valve set up for single acting might do it as well.

You can take the coupler end off of the hose that gets rock hard, get the hose end anchored in a bucket to catch the oil and try lifting it. If it lifts and oil goes in the bucket your problem is a blockage from that coupler back to the valve and tractor.

 

[manitobafarmer12]

In your first post you said the tiller moves about an inch, you here the pump working and the opposite hose gets rock hard. As Harry said in post #2 that sounds like a coupler issue not allowing oil to return to the reservoir. I added in post #16 that being in the wrong coupler or a valve set up for single acting might do it as well.

You can take the coupler end off of the hose that gets rock hard, get the hose end anchored in a bucket to catch the oil and try lifting it. If it lifts and oil goes in the bucket your problem is a blockage from that coupler back to the valve and tractor.

That's what I'm thinking. Might switch couplers around to new ones instead of running adapters

 

[Jim.ME]

That's what I'm thinking. Might switch couplers around to new ones instead of running adapters

Much better idea, it eliminates one possible blockage point in each hose run.